[ONOS-6248] VPLS refactoring

Change-Id: I8ffb2199ca108ad8dfe271681068636fc4af2a40
diff --git a/apps/vpls/src/test/java/org/onosproject/vpls/VplsConfigServiceAdapter.java b/apps/vpls/src/test/java/org/onosproject/vpls/VplsConfigServiceAdapter.java
deleted file mode 100644
index e5844fb..0000000
--- a/apps/vpls/src/test/java/org/onosproject/vpls/VplsConfigServiceAdapter.java
+++ /dev/null
@@ -1,99 +0,0 @@
-/*
- * Copyright 2016-present Open Networking Laboratory
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package org.onosproject.vpls;
-
-import com.google.common.collect.SetMultimap;
-import org.onlab.packet.VlanId;
-import org.onosproject.incubator.net.intf.Interface;
-import org.onosproject.net.ConnectPoint;
-import org.onosproject.net.EncapsulationType;
-import org.onosproject.vpls.config.VplsConfigService;
-
-import java.util.Map;
-import java.util.Set;
-
-/**
- * Test adapter for VPLS configuration service.
- */
-public class VplsConfigServiceAdapter implements VplsConfigService {
-    @Override
-    public void addVpls(String vplsName, Set<String> ifaces, String encap) {}
-
-    @Override
-    public void removeVpls(String vplsName) {}
-
-    @Override
-    public void addIface(String vplsName, String iface) {}
-
-    @Override
-    public void setEncap(String vplsName, String encap) {}
-
-    @Override
-    public EncapsulationType encap(String vplsName) {
-        return null;
-    }
-
-    @Override
-    public void removeIface(String iface) {}
-
-    @Override
-    public void cleanVplsConfig() {}
-
-    @Override
-    public Set<String> vplsAffectedByApi() {
-        return null;
-    }
-
-    @Override
-    public Set<Interface> allIfaces() {
-        return null;
-    }
-
-    @Override
-    public Set<Interface> ifaces() {
-        return null;
-    }
-
-    @Override
-    public Set<Interface> ifaces(String vplsName) {
-        return null;
-    }
-
-    @Override
-    public Set<String> vplsNames() {
-        return null;
-    }
-
-    @Override
-    public Set<String> vplsNamesOld() {
-        return null;
-    }
-
-    @Override
-    public SetMultimap<String, Interface> ifacesByVplsName() {
-        return null;
-    }
-
-    @Override
-    public SetMultimap<String, Interface> ifacesByVplsName(VlanId vlan, ConnectPoint connectPoint) {
-        return null;
-    }
-
-    @Override
-    public Map<String, EncapsulationType> encapByVplsName() {
-        return null;
-    }
-}
diff --git a/apps/vpls/src/test/java/org/onosproject/vpls/VplsIntentTest.java b/apps/vpls/src/test/java/org/onosproject/vpls/VplsIntentTest.java
new file mode 100644
index 0000000..7ee9292
--- /dev/null
+++ b/apps/vpls/src/test/java/org/onosproject/vpls/VplsIntentTest.java
@@ -0,0 +1,537 @@
+/*
+ * Copyright 2016-present Open Networking Laboratory
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.onosproject.vpls;
+
+import com.google.common.collect.ImmutableSet;
+import com.google.common.collect.Lists;
+import com.google.common.collect.Maps;
+import com.google.common.collect.Sets;
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+import org.onlab.packet.MacAddress;
+import org.onlab.packet.VlanId;
+import org.onosproject.incubator.net.intf.Interface;
+import org.onosproject.incubator.net.intf.InterfaceListener;
+import org.onosproject.incubator.net.intf.InterfaceService;
+import org.onosproject.net.ConnectPoint;
+import org.onosproject.net.EncapsulationType;
+import org.onosproject.net.FilteredConnectPoint;
+import org.onosproject.net.Host;
+import org.onosproject.net.flow.DefaultTrafficSelector;
+import org.onosproject.net.flow.TrafficSelector;
+import org.onosproject.net.flow.criteria.Criterion;
+import org.onosproject.net.flow.criteria.VlanIdCriterion;
+import org.onosproject.net.intent.Intent;
+import org.onosproject.net.intent.IntentService;
+import org.onosproject.net.intent.IntentServiceAdapter;
+import org.onosproject.net.intent.IntentUtils;
+import org.onosproject.net.intent.Key;
+import org.onosproject.net.intent.MultiPointToSinglePointIntent;
+import org.onosproject.net.intent.SinglePointToMultiPointIntent;
+import org.onosproject.vpls.api.VplsData;
+import org.onosproject.vpls.intent.VplsIntentUtility;
+
+import java.util.Collection;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+import java.util.stream.Collectors;
+
+import static java.lang.String.format;
+import static org.easymock.EasyMock.anyObject;
+import static org.easymock.EasyMock.createMock;
+import static org.easymock.EasyMock.expect;
+import static org.easymock.EasyMock.expectLastCall;
+import static org.easymock.EasyMock.replay;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
+import static org.onosproject.net.EncapsulationType.NONE;
+import static org.onosproject.net.EncapsulationType.VLAN;
+
+/**
+ * Tests for {@link VplsIntentUtility}.
+ */
+public class VplsIntentTest extends VplsTest {
+
+    private Set<Host> hostsAvailable;
+    private IntentService intentService;
+    private InterfaceService interfaceService;
+
+    @Before
+    public void setUp() throws Exception {
+        idGenerator = new TestIdGenerator();
+        Intent.unbindIdGenerator(idGenerator);
+        Intent.bindIdGenerator(idGenerator);
+        hostsAvailable = Sets.newHashSet();
+        intentService = new TestIntentService();
+        interfaceService = createMock(InterfaceService.class);
+        interfaceService.addListener(anyObject(InterfaceListener.class));
+        expectLastCall().anyTimes();
+        addIfaceConfig();
+    }
+
+    @After
+    public void tearDown() {
+        Intent.unbindIdGenerator(idGenerator);
+    }
+
+    /**
+     * Creates the interface configuration:
+     *  On devices 1 and 2 is configured an interface on port 1 with vlan 100.
+     *  On device 3 is configured an interface on port 3 with no vlan.
+     *  On devices 3 and 4 is configured an interface on port 1 with vlan 200.
+     *  On device 4 is an interface configured on port 2 with vlan 400.
+     *  On device 5 are configured two interfaces on port 1 and 2 with no vlan.
+     *  On device 5 and 6 is configured an interface on port 1 with vlan 300.
+     */
+    private void addIfaceConfig() {
+        Set<Interface> interfaces = ImmutableSet.copyOf(AVAILABLE_INTERFACES);
+        Set<Interface> vlanOneSet = ImmutableSet.of(V100H1, V100H2);
+        Set<Interface> vlanTwoSet = ImmutableSet.of(V200H1, V200H2);
+        Set<Interface> vlanThreeSet = ImmutableSet.of(VNONEH1, VNONEH2);
+        Set<Interface> vlanFourSet = ImmutableSet.of(V400H1, VNONEH3);
+
+        AVAILABLE_INTERFACES.forEach(intf -> {
+            expect(interfaceService.getInterfacesByPort(intf.connectPoint()))
+                    .andReturn(Sets.newHashSet(intf)).anyTimes();
+        });
+        expect(interfaceService.getInterfacesByVlan(VLAN100))
+                .andReturn(vlanOneSet).anyTimes();
+        expect(interfaceService.getInterfacesByVlan(VLAN200))
+                .andReturn(vlanTwoSet).anyTimes();
+        expect(interfaceService.getInterfacesByVlan(VLAN300))
+                .andReturn(vlanThreeSet).anyTimes();
+        expect(interfaceService.getInterfacesByVlan(VLAN400))
+                .andReturn(vlanFourSet).anyTimes();
+        expect(interfaceService.getInterfacesByVlan(VlanId.NONE))
+                .andReturn(vlanFourSet).anyTimes();
+        expect(interfaceService.getInterfaces()).andReturn(interfaces).anyTimes();
+
+        replay(interfaceService);
+    }
+
+    /**
+     * Seven ports are configured with VLANs, while three ports are not. No hosts are
+     * registered by the HostService.
+     *
+     * The first three ports have an interface configured on VPLS 1,
+     * the other three on VPLS 2. Two ports are defined for VPLS 3, while
+     * the two remaining ports are configured on VPLS 4.
+     *
+     * The number of intents expected is 10: three for VPLS 1, three for VPLS 2,
+     * two for VPLS 3, two for VPLS 4. Eight MP2SP intents.
+     * Checks if the number of intents submitted to the intent framework is
+     * equal to the number of intents expected and if all intents are equivalent.
+     */
+    @Test
+    public void activateNoHosts() {
+        List<Intent> expectedIntents = Lists.newArrayList();
+        Set<FilteredConnectPoint> fcPoints;
+        Set<Interface> interfaces;
+
+        interfaces = ImmutableSet.of(V100H1, V200H1, V300H1);
+        VplsData vplsData = createVplsData(VPLS1, VLAN, interfaces);
+        Set<Intent> brcIntents = VplsIntentUtility.buildBrcIntents(vplsData, APPID);
+        brcIntents.forEach(intentService::submit);
+        fcPoints = buildFCPoints(interfaces);
+        expectedIntents.addAll(generateVplsBrc(fcPoints, VPLS1, VLAN));
+
+        checkIntents(expectedIntents);
+
+        interfaces = ImmutableSet.of(V100H2, V200H2, V300H2);
+        vplsData = createVplsData(VPLS2, NONE, interfaces);
+        brcIntents = VplsIntentUtility.buildBrcIntents(vplsData, APPID);
+        brcIntents.forEach(intentService::submit);
+        fcPoints = buildFCPoints(interfaces);
+        expectedIntents.addAll(generateVplsBrc(fcPoints, VPLS2, NONE));
+
+        checkIntents(expectedIntents);
+
+        interfaces = ImmutableSet.of(VNONEH1, VNONEH2);
+        vplsData = createVplsData(VPLS3, NONE, interfaces);
+        brcIntents = VplsIntentUtility.buildBrcIntents(vplsData, APPID);
+        brcIntents.forEach(intentService::submit);
+        fcPoints = buildFCPoints(interfaces);
+        expectedIntents.addAll(generateVplsBrc(fcPoints, VPLS3, NONE));
+
+        checkIntents(expectedIntents);
+
+        interfaces = ImmutableSet.of(V400H1, VNONEH3);
+        vplsData = createVplsData(VPLS4, NONE, interfaces);
+        brcIntents = VplsIntentUtility.buildBrcIntents(vplsData, APPID);
+        brcIntents.forEach(intentService::submit);
+        fcPoints = buildFCPoints(interfaces);
+        expectedIntents.addAll(generateVplsBrc(fcPoints, VPLS4, NONE));
+
+        checkIntents(expectedIntents);
+    }
+
+
+
+    /**
+     * Ten ports are configured with VLANs and ten hosts are registered by the
+     * HostService.
+     *
+     * The first three ports have an interface configured on VPLS 1,
+     * the other three on VPLS 2, two on VPLS3 and two on VPLS4.
+     *
+     * The number of intents expected is twenty: six
+     * for VPLS 1, six for VPLS 2. four for VPLS 3, four for VPLS 4.
+     * That is ten sp2mp intents, ten mp2sp intents. For VPLS 1
+     * IPs are added to demonstrate this doesn't influence the number of intents
+     * created. Checks if the number of intents submitted to the intent
+     * framework is equal to the number of intents expected and if all intents
+     * are equivalent.
+     */
+    @Test
+    public void tenInterfacesConfiguredHostsPresent() {
+        hostsAvailable.addAll(AVAILABLE_HOSTS);
+
+        List<Intent> expectedIntents = Lists.newArrayList();
+        Set<FilteredConnectPoint> fcPoints;
+        Set<Host> hosts;
+        Set<Interface> interfaces;
+        VplsData vplsData;
+        Set<Intent> brcIntents;
+        Set<Intent> uniIntents;
+
+        interfaces = ImmutableSet.of(V100H1, V200H1, V300H1);
+        fcPoints = buildFCPoints(interfaces);
+        hosts = ImmutableSet.of(V100HOST1, V200HOST1, V300HOST1);
+        vplsData = createVplsData(VPLS1, VLAN, interfaces);
+        brcIntents = VplsIntentUtility.buildBrcIntents(vplsData, APPID);
+        uniIntents = VplsIntentUtility.buildUniIntents(vplsData, hosts, APPID);
+        brcIntents.forEach(intentService::submit);
+        uniIntents.forEach(intentService::submit);
+        expectedIntents.addAll(generateVplsBrc(fcPoints, VPLS1, VLAN));
+        expectedIntents.addAll(generateVplsUni(fcPoints, hosts, VPLS1, VLAN));
+
+        interfaces = ImmutableSet.of(V100H2, V200H2, V300H2);
+        fcPoints = buildFCPoints(interfaces);
+        hosts = ImmutableSet.of(V100HOST2, V200HOST2, V300HOST2);
+        vplsData = createVplsData(VPLS2, NONE, interfaces);
+        brcIntents = VplsIntentUtility.buildBrcIntents(vplsData, APPID);
+        uniIntents = VplsIntentUtility.buildUniIntents(vplsData, hosts, APPID);
+        brcIntents.forEach(intentService::submit);
+        uniIntents.forEach(intentService::submit);
+        expectedIntents.addAll(generateVplsBrc(fcPoints, VPLS2, NONE));
+        expectedIntents.addAll(generateVplsUni(fcPoints, hosts, VPLS2, NONE));
+
+        interfaces = ImmutableSet.of(VNONEH1, VNONEH2);
+        fcPoints = buildFCPoints(interfaces);
+        hosts = ImmutableSet.of(VNONEHOST1, VNONEHOST2);
+        vplsData = createVplsData(VPLS3, NONE, interfaces);
+        brcIntents = VplsIntentUtility.buildBrcIntents(vplsData, APPID);
+        uniIntents = VplsIntentUtility.buildUniIntents(vplsData, hosts, APPID);
+        brcIntents.forEach(intentService::submit);
+        uniIntents.forEach(intentService::submit);
+        expectedIntents.addAll(generateVplsBrc(fcPoints, VPLS3, NONE));
+        expectedIntents.addAll(generateVplsUni(fcPoints, hosts, VPLS3, NONE));
+
+        interfaces = ImmutableSet.of(V400H1, VNONEH3);
+        fcPoints = buildFCPoints(interfaces);
+        hosts = ImmutableSet.of(V400HOST1, VNONEHOST3);
+        vplsData = createVplsData(VPLS4, NONE, interfaces);
+        brcIntents = VplsIntentUtility.buildBrcIntents(vplsData, APPID);
+        uniIntents = VplsIntentUtility.buildUniIntents(vplsData, hosts, APPID);
+        brcIntents.forEach(intentService::submit);
+        uniIntents.forEach(intentService::submit);
+        expectedIntents.addAll(generateVplsBrc(fcPoints, VPLS4, NONE));
+        expectedIntents.addAll(generateVplsUni(fcPoints, hosts, VPLS4, NONE));
+
+        checkIntents(expectedIntents);
+    }
+
+    /**
+     * Generates a list of the expected sp2mp intents for a VPLS.
+     *
+     * @param fcPoints the filtered connect point
+     * @param name the name of the VPLS
+     * @param encap the encapsulation type
+     * @return the list of expected sp2mp intents for the given VPLS
+     */
+    private List<SinglePointToMultiPointIntent>
+    generateVplsBrc(Set<FilteredConnectPoint> fcPoints, String name, EncapsulationType encap) {
+        List<SinglePointToMultiPointIntent> intents = Lists.newArrayList();
+
+        fcPoints.forEach(point -> {
+            Set<FilteredConnectPoint> otherPoints =
+                    fcPoints.stream()
+                            .filter(fcp -> !fcp.equals(point))
+                            .collect(Collectors.toSet());
+
+            Key brckey = buildKey(VplsIntentUtility.PREFIX_BROADCAST,
+                                  point.connectPoint(),
+                                  name,
+                                  MacAddress.BROADCAST);
+
+            intents.add(buildBrcIntent(brckey, point, otherPoints, encap));
+        });
+
+        return intents;
+    }
+
+    /**
+     * Generates a list of expected mp2sp intents for a given VPLS.
+     *
+     * @param fcPoints the filtered connect point
+     * @param hosts the hosts
+     * @param name the name of the VPLS
+     * @param encap the encapsulation type
+     * @return the list of expected mp2sp intents for the given VPLS
+     */
+    private List<MultiPointToSinglePointIntent>
+    generateVplsUni(Set<FilteredConnectPoint> fcPoints, Set<Host> hosts,
+                    String name, EncapsulationType encap) {
+        List<MultiPointToSinglePointIntent> intents = Lists.newArrayList();
+
+        hosts.forEach(host -> {
+            FilteredConnectPoint hostPoint = getHostPoint(host, fcPoints);
+
+            Set<FilteredConnectPoint> otherPoints =
+                    fcPoints.stream()
+                            .filter(fcp -> !fcp.equals(hostPoint))
+                            .collect(Collectors.toSet());
+
+            Key uniKey = buildKey(VplsIntentUtility.PREFIX_UNICAST,
+                                  host.location(), name, host.mac());
+
+            intents.add(buildUniIntent(uniKey, otherPoints, hostPoint, host, encap));
+        });
+
+        return intents;
+    }
+
+    /**
+     * Checks if the number of intents submitted to the intent framework is equal
+     * to the number of intents expected and if all intents are equivalent.
+     *
+     * @param intents the list of intents expected
+     */
+    private void checkIntents(List<Intent> intents) {
+        assertEquals("The number of intents submitted differs from the number" +
+                             " of intents expected. ",
+                     intents.size(), intentService.getIntentCount());
+        for (Intent intentOne : intents) {
+            boolean found = false;
+            for (Intent intentTwo : intentService.getIntents()) {
+                if (intentOne.key().equals(intentTwo.key())) {
+                    found = true;
+                    assertTrue(format("The intent submitted is different from" +
+                                              " the intent expected. %s %s",
+                                      intentOne, intentTwo),
+                               IntentUtils.intentsAreEqual(intentOne, intentTwo));
+                    break;
+                }
+            }
+            assertTrue("The intent submitted is not equal to any of the expected" +
+                               " intents. ", found);
+        }
+    }
+
+    /**
+     * Builds a broadcast intent.
+     *
+     * @param key the key to identify the intent
+     * @param src the ingress connect point
+     * @param dsts the egress connect points
+     * @return the generated single-point to multi-point intent
+     */
+    private SinglePointToMultiPointIntent buildBrcIntent(Key key,
+                                                         FilteredConnectPoint src,
+                                                         Set<FilteredConnectPoint> dsts,
+                                                         EncapsulationType encap) {
+        SinglePointToMultiPointIntent.Builder intentBuilder;
+        TrafficSelector selector = DefaultTrafficSelector.builder()
+                .matchEthDst(MacAddress.BROADCAST)
+                .build();
+        intentBuilder = SinglePointToMultiPointIntent.builder()
+                .appId(APPID)
+                .key(key)
+                .selector(selector)
+                .filteredIngressPoint(src)
+                .filteredEgressPoints(dsts)
+                .constraints(VplsIntentUtility.PARTIAL_FAILURE_CONSTRAINT)
+                .priority(PRIORITY_OFFSET);
+        VplsIntentUtility.setEncap(intentBuilder,
+                                   VplsIntentUtility.PARTIAL_FAILURE_CONSTRAINT,
+                                   encap);
+
+        return intentBuilder.build();
+    }
+
+    /**
+     * Builds a unicast intent.
+     *
+     * @param key the key to identify the intent
+     * @param srcs the ingress connect points
+     * @param dst the egress connect point
+     * @param host the destination Host
+     * @return the generated multi-point to single-point intent
+     */
+    private MultiPointToSinglePointIntent buildUniIntent(Key key,
+                                                         Set<FilteredConnectPoint> srcs,
+                                                         FilteredConnectPoint dst,
+                                                         Host host,
+                                                         EncapsulationType encap) {
+        MultiPointToSinglePointIntent.Builder intentBuilder;
+        TrafficSelector selector = DefaultTrafficSelector.builder()
+                .matchEthDst(host.mac())
+                .build();
+        intentBuilder = MultiPointToSinglePointIntent.builder()
+                .appId(APPID)
+                .key(key)
+                .selector(selector)
+                .filteredIngressPoints(srcs)
+                .filteredEgressPoint(dst)
+                .constraints(VplsIntentUtility.PARTIAL_FAILURE_CONSTRAINT)
+                .priority(PRIORITY_OFFSET);
+        VplsIntentUtility.setEncap(intentBuilder,
+                                   VplsIntentUtility.PARTIAL_FAILURE_CONSTRAINT,
+                                   encap);
+
+        return intentBuilder.build();
+    }
+
+    /**
+     * Returns the filtered connect point associated to a given host.
+     *
+     * @param host the target host
+     * @param fcps the filtered connected points
+     * @return the filtered connect point associated to the given host; null
+     * otherwise
+     */
+    private FilteredConnectPoint getHostPoint(Host host,
+                                              Set<FilteredConnectPoint> fcps) {
+        return fcps.stream()
+                .filter(fcp -> fcp.connectPoint().equals(host.location()))
+                .filter(fcp -> {
+                    VlanIdCriterion vlanCriterion =
+                            (VlanIdCriterion) fcp.trafficSelector().
+                                    getCriterion(Criterion.Type.VLAN_VID);
+                    return vlanCriterion == null ||
+                            vlanCriterion.vlanId().equals(host.vlan());
+                })
+                .findFirst()
+                .orElse(null);
+    }
+
+    /**
+     * Computes a set of filtered connect points from a list of given interfaces.
+     *
+     * @param interfaces the interfaces to compute
+     * @return the set of filtered connect points
+     */
+    private Set<FilteredConnectPoint> buildFCPoints(Collection<Interface> interfaces) {
+        // Build all filtered connected points in the VPLS
+        return interfaces
+                .stream()
+                .map(intf -> {
+                    TrafficSelector.Builder selectorBuilder =
+                            DefaultTrafficSelector.builder();
+                    if (!intf.vlan().equals(VlanId.NONE)) {
+                        selectorBuilder.matchVlanId(intf.vlan());
+                    }
+                    return new FilteredConnectPoint(intf.connectPoint(),
+                                                    selectorBuilder.build());
+                })
+                .collect(Collectors.toSet());
+    }
+
+    /**
+     * Builds an intent Key either for a single-point to multi-point or
+     * multi-point to single-point intent, based on a prefix that defines
+     * the intent type, the connection point representing the source or the
+     * destination and the VLAN Id representing the VPLS.
+     *
+     * @param prefix the key prefix
+     * @param cPoint the ingress/egress connect point
+     * @param vplsName the VPLS name
+     * @param hostMac the ingress/egress MAC address
+     * @return the key to identify the intent
+     */
+    private Key buildKey(String prefix,
+                         ConnectPoint cPoint,
+                         String vplsName,
+                         MacAddress hostMac) {
+        String keyString = vplsName +
+                DASH +
+                prefix +
+                DASH +
+                cPoint.deviceId() +
+                DASH +
+                cPoint.port() +
+                DASH +
+                hostMac;
+
+        return Key.of(keyString, APPID);
+    }
+
+    /**
+     * Creates VPLS data by given name, encapsulation type and network
+     * interfaces.
+     *
+     * @param name the VPLS name
+     * @param encap the encapsulation type
+     * @param interfaces the network interfaces
+     * @return the VPLS data
+     */
+    private VplsData createVplsData(String name, EncapsulationType encap,
+                                    Set<Interface> interfaces) {
+        VplsData vplsData = VplsData.of(name, encap);
+        vplsData.addInterfaces(interfaces);
+        return vplsData;
+    }
+
+    /**
+     * Represents a fake IntentService class that allows to store and retrieve
+     * intents without implementing the IntentService logic.
+     */
+    private class TestIntentService extends IntentServiceAdapter {
+        private Map<Key, Intent> intents;
+
+        public TestIntentService() {
+            intents = Maps.newHashMap();
+        }
+
+        @Override
+        public void submit(Intent intent) {
+            intents.put(intent.key(), intent);
+        }
+
+        @Override
+        public long getIntentCount() {
+            return intents.size();
+        }
+
+        @Override
+        public Iterable<Intent> getIntents() {
+            return intents.values();
+        }
+
+        @Override
+        public Intent getIntent(Key intentKey) {
+            for (Intent intent : intents.values()) {
+                if (intent.key().equals(intentKey)) {
+                    return intent;
+                }
+            }
+            return null;
+        }
+    }
+
+}
diff --git a/apps/vpls/src/test/java/org/onosproject/vpls/VplsManagerTest.java b/apps/vpls/src/test/java/org/onosproject/vpls/VplsManagerTest.java
new file mode 100644
index 0000000..67128db
--- /dev/null
+++ b/apps/vpls/src/test/java/org/onosproject/vpls/VplsManagerTest.java
@@ -0,0 +1,339 @@
+/*
+ * Copyright 2017-present Open Networking Laboratory
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.onosproject.vpls;
+
+import com.google.common.collect.ImmutableSet;
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+import org.onosproject.net.EncapsulationType;
+import org.onosproject.net.host.HostEvent;
+import org.onosproject.vpls.api.VplsData;
+import org.onosproject.vpls.api.VplsOperation;
+import org.onosproject.vpls.api.VplsOperationService;
+import org.onosproject.vpls.store.VplsStoreEvent;
+
+import java.util.Collection;
+
+import static org.junit.Assert.*;
+import static org.onosproject.net.EncapsulationType.*;
+import static org.onosproject.vpls.api.VplsData.VplsState.*;
+
+/**
+ * Test for {@link VplsManager}
+ */
+public class VplsManagerTest extends VplsTest {
+    private VplsManager vplsManager;
+    private TestVplsStore vplsStore = new TestVplsStore();
+    private TestHostService hostService = new TestHostService();
+    private TestInterfaceService interfaceService = new TestInterfaceService();
+    private TestVplsOperationService vplsOperationService = new TestVplsOperationService();
+
+    @Before
+    public void setup() {
+        vplsManager = new VplsManager();
+        vplsManager.hostService = hostService;
+        vplsManager.vplsStore = vplsStore;
+        vplsManager.operationService = vplsOperationService;
+        vplsManager.interfaceService = interfaceService;
+        vplsStore.clear();
+        vplsOperationService.clear();
+        vplsManager.activate();
+    }
+
+    @After
+    public void tearDown() {
+        vplsManager.deactivate();
+    }
+
+    /**
+     * Creates VPLS by given name and encapsulation type.
+     */
+    @Test
+    public void testCreateVpls() {
+        VplsData vplsData = vplsManager.createVpls(VPLS1, NONE);
+        assertEquals(VPLS1, vplsData.name());
+        assertEquals(NONE, vplsData.encapsulationType());
+
+        vplsData = vplsStore.getVpls(VPLS1);
+        assertEquals(vplsData.state(), ADDING);
+    }
+
+    /**
+     * Gets VPLS by VPLS name.
+     */
+    @Test
+    public void testGetVpls() {
+        VplsData vplsData = VplsData.of(VPLS1);
+        vplsData.state(ADDED);
+        vplsStore.addVpls(vplsData);
+
+        VplsData result = vplsManager.getVpls(VPLS1);
+        assertEquals(vplsData, result);
+
+        result = vplsManager.getVpls(VPLS2);
+        assertNull(result);
+    }
+
+    /**
+     * Removes a VPLS.
+     */
+    @Test
+    public void testRemoveVpls() {
+        VplsData vplsData = vplsManager.createVpls(VPLS1, NONE);
+        vplsManager.removeVpls(vplsData);
+        assertEquals(vplsData.state(), REMOVING);
+        vplsData = vplsStore.getVpls(VPLS1);
+        assertNull(vplsData);
+        Collection<VplsData> allVpls = vplsStore.getAllVpls();
+        assertEquals(0, allVpls.size());
+    }
+
+    /**
+     * Removes all VPLS.
+     */
+    @Test
+    public void testRemoveAllVpls() {
+        VplsData vplsData = VplsData.of(VPLS1);
+        vplsData.state(ADDED);
+        vplsStore.addVpls(vplsData);
+
+        vplsData = VplsData.of(VPLS2, VLAN);
+        vplsData.state(ADDED);
+        vplsStore.addVpls(vplsData);
+
+        vplsManager.removeAllVpls();
+        assertEquals(0, vplsStore.getAllVpls().size());
+    }
+
+    /**
+     * Adds network interfaces one by one to a VPLS.
+     */
+    @Test
+    public void testAddInterface() {
+        VplsData vplsData = vplsManager.createVpls(VPLS1, NONE);
+        vplsManager.addInterface(vplsData, V100H1);
+        vplsManager.addInterface(vplsData, V100H2);
+        vplsData = vplsStore.getVpls(VPLS1);
+        assertNotNull(vplsData);
+        assertEquals(vplsData.state(), UPDATING);
+        assertEquals(2, vplsData.interfaces().size());
+        assertTrue(vplsData.interfaces().contains(V100H1));
+        assertTrue(vplsData.interfaces().contains(V100H2));
+    }
+
+    /**
+     * Adds network interfaces to a VPLS.
+     */
+    @Test
+    public void testAddInterfaces() {
+        VplsData vplsData = vplsManager.createVpls(VPLS1, NONE);
+        vplsManager.addInterfaces(vplsData, ImmutableSet.of(V100H1, V100H2));
+        vplsData = vplsStore.getVpls(VPLS1);
+        assertNotNull(vplsData);
+        assertEquals(vplsData.state(), UPDATING);
+        assertEquals(2, vplsData.interfaces().size());
+        assertTrue(vplsData.interfaces().contains(V100H1));
+        assertTrue(vplsData.interfaces().contains(V100H2));
+    }
+
+    /**
+     * Removes network interfaces one by one from a VPLS.
+     */
+    @Test
+    public void testRemoveInterface() {
+        VplsData vplsData = vplsManager.createVpls(VPLS1, NONE);
+        vplsManager.addInterface(vplsData, V100H1);
+        vplsManager.addInterface(vplsData, V100H2);
+        vplsManager.removeInterface(vplsData, V100H1);
+        vplsData = vplsStore.getVpls(VPLS1);
+        assertNotNull(vplsData);
+        assertEquals(vplsData.state(), UPDATING);
+        assertEquals(1, vplsData.interfaces().size());
+        assertTrue(vplsData.interfaces().contains(V100H2));
+    }
+
+    /**
+     * Removes network interfaces from a VPLS.
+     */
+    @Test
+    public void testRemoveInterfaces() {
+        VplsData vplsData = vplsManager.createVpls(VPLS1, NONE);
+        vplsManager.addInterface(vplsData, V100H1);
+        vplsManager.addInterface(vplsData, V100H2);
+        vplsManager.removeInterfaces(vplsData, ImmutableSet.of(V100H1, V100H2));
+        vplsData = vplsStore.getVpls(VPLS1);
+        assertNotNull(vplsData);
+        assertEquals(vplsData.state(), UPDATING);
+        assertEquals(0, vplsData.interfaces().size());
+    }
+
+    /**
+     * Sets encapsulation type for a VPLS.
+     */
+    @Test
+    public void testSetEncapsulationType() {
+        VplsData vplsData = vplsManager.createVpls(VPLS1, NONE);
+        vplsManager.setEncapsulationType(vplsData, EncapsulationType.VLAN);
+        vplsData = vplsStore.getVpls(VPLS1);
+        assertNotNull(vplsData);
+        assertEquals(vplsData.state(), UPDATING);
+        assertEquals(vplsData.encapsulationType(), EncapsulationType.VLAN);
+    }
+
+    /**
+     * Adds hosts to a VPLS.
+     */
+    @Test
+    public void testAddHost() {
+        VplsData vplsData  = VplsData.of(VPLS1, NONE);
+        vplsData.addInterface(V100H1);
+        vplsData.state(ADDED);
+        vplsStore.addVpls(vplsData);
+
+        HostEvent hostEvent = new HostEvent(HostEvent.Type.HOST_ADDED, V100HOST1);
+        hostService.postHostEvent(hostEvent);
+
+        vplsData = vplsStore.getVpls(VPLS1);
+        assertNotNull(vplsData);
+
+        assertEquals(vplsData.state(), UPDATING);
+    }
+
+    /**
+     * Removes hosts from a VPLS.
+     */
+    @Test
+    public void testRemoveHost() {
+        VplsData vplsData  = VplsData.of(VPLS1, NONE);
+        vplsData.addInterface(V100H1);
+        vplsData.state(ADDED);
+        vplsStore.addVpls(vplsData);
+
+        HostEvent hostEvent = new HostEvent(HostEvent.Type.HOST_REMOVED, V100HOST1);
+        hostService.postHostEvent(hostEvent);
+        vplsData = vplsStore.getVpls(VPLS1);
+        assertNotNull(vplsData);
+
+        assertEquals(vplsData.state(), UPDATING);
+    }
+
+    /**
+     * Pass different VPLS store event to store delegate.
+     * Include these cases:
+     * <ul>
+     *     <li>VPLS added</li>
+     *     <li>VPLS updated</li>
+     *     <li>VPLS state updated</li>
+     *     <li>VPLS removed</li>
+     * </ul>
+     */
+    @Test
+    public void testStoreDelegate() {
+        // Add
+        VplsData vplsData = vplsManager.createVpls(VPLS1, NONE);
+        VplsStoreEvent event = new VplsStoreEvent(VplsStoreEvent.Type.ADD, vplsData);
+        vplsStore.delegate().notify(event);
+
+        VplsOperation vplsOperation = vplsOperationService.operation();
+        assertEquals(vplsOperation.op(), VplsOperation.Operation.ADD);
+        assertEquals(vplsOperation.vpls(), vplsData);
+        vplsOperationService.clear();
+
+        // Update info
+        vplsData.encapsulationType(EncapsulationType.VLAN);
+        vplsData.state(UPDATING);
+        event = new VplsStoreEvent(VplsStoreEvent.Type.UPDATE, vplsData);
+        vplsStore.delegate().notify(event);
+        vplsOperation = vplsOperationService.operation();
+        assertEquals(vplsOperation.op(), VplsOperation.Operation.UPDATE);
+        assertEquals(vplsOperation.vpls(), vplsData);
+        vplsOperationService.clear();
+
+        // Update state (no operation)
+        vplsData.state(VplsData.VplsState.ADDED);
+        event = new VplsStoreEvent(VplsStoreEvent.Type.UPDATE, vplsData);
+        vplsStore.delegate().notify(event);
+        vplsOperation = vplsOperationService.operation();
+        assertNull(vplsOperation);
+        vplsOperationService.clear();
+
+        // Remove
+        event = new VplsStoreEvent(VplsStoreEvent.Type.REMOVE, vplsData);
+        vplsStore.delegate().notify(event);
+        vplsOperation = vplsOperationService.operation();
+        assertEquals(vplsOperation.op(), VplsOperation.Operation.REMOVE);
+        assertEquals(vplsOperation.vpls(), vplsData);
+        vplsOperationService.clear();
+    }
+
+    /**
+     * Trigger host event listener by HOST_ADDED event.
+     */
+    @Test
+    public void hostAddEventTest() {
+        VplsData vplsData = vplsManager.createVpls(VPLS1, NONE);
+        vplsManager.addInterface(vplsData, V100H1);
+        HostEvent hostEvent = new HostEvent(HostEvent.Type.HOST_ADDED, V100HOST1);
+        hostService.postHostEvent(hostEvent);
+
+        vplsData = vplsStore.getVpls(VPLS1);
+        assertEquals(UPDATING, vplsData.state());
+    }
+
+    /**
+     * Trigger host event listener by HOST_REMOVED event.
+     */
+    @Test
+    public void hostRemoveEventTest() {
+        VplsData vplsData = vplsManager.createVpls(VPLS1, NONE);
+        vplsManager.addInterface(vplsData, V100H1);
+        HostEvent hostEvent = new HostEvent(HostEvent.Type.HOST_REMOVED, V100HOST1);
+        hostService.postHostEvent(hostEvent);
+
+        vplsData = vplsStore.getVpls(VPLS1);
+        assertEquals(UPDATING, vplsData.state());
+    }
+
+    /**
+     * Test VPLS operation service.
+     * Stores last operation submitted by VPLS manager.
+     */
+    class TestVplsOperationService implements VplsOperationService {
+        VplsOperation operation;
+
+        @Override
+        public void submit(VplsOperation vplsOperation) {
+            this.operation = vplsOperation;
+        }
+
+        /**
+         * Clears the VPLS operation.
+         */
+        public void clear() {
+            operation = null;
+        }
+
+        /**
+         * Gets the latest VPLS operation.
+         * @return the latest VPLS operation.
+         */
+        public VplsOperation operation() {
+            return operation;
+        }
+    }
+
+}
diff --git a/apps/vpls/src/test/java/org/onosproject/vpls/VplsNeighbourHandlerTest.java b/apps/vpls/src/test/java/org/onosproject/vpls/VplsNeighbourHandlerTest.java
index 412e937..2acc871 100644
--- a/apps/vpls/src/test/java/org/onosproject/vpls/VplsNeighbourHandlerTest.java
+++ b/apps/vpls/src/test/java/org/onosproject/vpls/VplsNeighbourHandlerTest.java
@@ -17,8 +17,6 @@
 
 import com.google.common.collect.HashMultimap;
 import com.google.common.collect.ImmutableSet;
-import com.google.common.collect.ImmutableSetMultimap;
-import com.google.common.collect.Maps;
 import com.google.common.collect.SetMultimap;
 import com.google.common.collect.Sets;
 import org.junit.After;
@@ -30,8 +28,6 @@
 import org.onlab.packet.VlanId;
 import org.onosproject.core.ApplicationId;
 import org.onosproject.incubator.net.intf.Interface;
-import org.onosproject.incubator.net.intf.InterfaceListener;
-import org.onosproject.incubator.net.intf.InterfaceService;
 import org.onosproject.incubator.net.neighbour.NeighbourHandlerRegistration;
 import org.onosproject.incubator.net.neighbour.NeighbourMessageContext;
 import org.onosproject.incubator.net.neighbour.NeighbourMessageHandler;
@@ -39,122 +35,26 @@
 import org.onosproject.incubator.net.neighbour.NeighbourProtocol;
 import org.onosproject.incubator.net.neighbour.NeighbourResolutionService;
 import org.onosproject.net.ConnectPoint;
-import org.onosproject.net.DefaultHost;
-import org.onosproject.net.DeviceId;
-import org.onosproject.net.EncapsulationType;
 import org.onosproject.net.Host;
-import org.onosproject.net.HostId;
-import org.onosproject.net.HostLocation;
-import org.onosproject.net.PortNumber;
 import org.onosproject.net.host.HostService;
-import org.onosproject.net.host.HostServiceAdapter;
-import org.onosproject.net.provider.ProviderId;
+import org.onosproject.vpls.api.VplsData;
 
 import java.util.Collection;
-import java.util.HashMap;
 import java.util.Map;
 import java.util.Set;
-import java.util.stream.Collectors;
 
 import static junit.framework.TestCase.assertEquals;
+import static junit.framework.TestCase.assertTrue;
 
 /**
- * Tests the the {@link VplsNeighbourHandler} class.
+ * Tests the the {@link VplsNeighbourHandler}.
  */
-public class VplsNeighbourHandlerTest {
+public class VplsNeighbourHandlerTest extends VplsTest {
 
     private static final String IFACES_NOT_EXPECTED =
             "The interfaces reached by the packet are not equal to the " +
                     "interfaces expected.";
-
-    private static final DeviceId DID1 = getDeviceId(1);
-    private static final DeviceId DID2 = getDeviceId(2);
-    private static final DeviceId DID3 = getDeviceId(3);
-    private static final DeviceId DID4 = getDeviceId(4);
-    private static final DeviceId DID5 = getDeviceId(5);
-
-    private static final PortNumber P1 = PortNumber.portNumber(1);
-    private static final PortNumber P2 = PortNumber.portNumber(2);
-    private static final PortNumber P3 = PortNumber.portNumber(3);
-
-    private static final ConnectPoint OF1P1 = new ConnectPoint(DID1, P1);
-    private static final ConnectPoint OF2P1 = new ConnectPoint(DID2, P1);
-    private static final ConnectPoint OF3P1 = new ConnectPoint(DID3, P1);
-    private static final ConnectPoint OF4P1 = new ConnectPoint(DID4, P1);
-    private static final ConnectPoint OF4P2 = new ConnectPoint(DID4, P2);
-    private static final ConnectPoint OF4P3 = new ConnectPoint(DID4, P3);
-    private static final ConnectPoint OF5P1 = new ConnectPoint(DID5, P1);
-    private static final ConnectPoint OF5P2 = new ConnectPoint(DID5, P2);
-    private static final ConnectPoint OF5P3 = new ConnectPoint(DID5, P3);
-
-    private static final String VPLS1 = "vpls1";
-    private static final String VPLS2 = "vpls2";
-    private static final String VPLS3 = "vpls3";
-    private static final String VPLS4 = "vpls4";
-
-    private static final VlanId VLAN100 = VlanId.vlanId("100");
-    private static final VlanId VLAN200 = VlanId.vlanId("200");
-    private static final VlanId VLAN300 = VlanId.vlanId("300");
-    private static final VlanId VLAN400 = VlanId.vlanId("400");
-    private static final VlanId VLAN_NONE = VlanId.NONE;
-
-    private static final Interface V100H1 =
-            new Interface("v100h1", OF1P1, null, null, VLAN100);
-    private static final Interface V100H2 =
-            new Interface("v100h2", OF4P1, null, null, VLAN100);
-    private static final Interface V200H1 =
-            new Interface("v200h1", OF4P2, null, null, VLAN200);
-    private static final Interface V200H2 =
-            new Interface("v200h2", OF2P1, null, null, VLAN200);
-    private static final Interface V300H1 =
-            new Interface("v300h1", OF3P1, null, null, VLAN300);
-    private static final Interface V400H1 =
-            new Interface("v400h1", OF5P1, null, null, VLAN400);
-    private static final Interface VNONEH1 =
-            new Interface("vNoneh1", OF5P2, null, null, VLAN_NONE);
-    private static final Interface VNONEH2 =
-            new Interface("vNoneh2", OF5P3, null, null, VLAN_NONE);
-    private static final Interface VNONEH3 =
-            new Interface("vNoneh3", OF4P3, null, null, VLAN_NONE);
-
-    private static final MacAddress MAC1 = MacAddress.valueOf("00:00:00:00:00:01");
-    private static final MacAddress MAC2 = MacAddress.valueOf("00:00:00:00:00:02");
-    private static final MacAddress MAC3 = MacAddress.valueOf("00:00:00:00:00:03");
-    private static final MacAddress MAC4 = MacAddress.valueOf("00:00:00:00:00:04");
-    private static final MacAddress MAC5 = MacAddress.valueOf("00:00:00:00:00:05");
-    private static final MacAddress MAC6 = MacAddress.valueOf("00:00:00:00:00:06");
-    private static final MacAddress MAC7 = MacAddress.valueOf("00:00:00:00:00:07");
-    private static final MacAddress MAC8 = MacAddress.valueOf("00:00:00:00:00:08");
-    private static final MacAddress MAC9 = MacAddress.valueOf("00:00:00:00:00:09");
-
-    private static final ProviderId PID = new ProviderId("of", "foo");
-
-    private final Host v100Host1 = makeHost(MAC1, VLAN100, OF1P1);
-    private final Host v100Host2 = makeHost(MAC2, VLAN100, OF4P1);
-    private final Host v200Host1 = makeHost(MAC3, VLAN200, OF4P2);
-    private final Host v200Host2 = makeHost(MAC5, VLAN200, OF2P1);
-    private final Host v300Host1 = makeHost(MAC4, VLAN300, OF3P1);
-    private final Host v400Host1 = makeHost(MAC6, VLAN400, OF5P1);
-    private final Host vNoneHost1 = makeHost(MAC7, VLAN_NONE, OF5P2);
-    private final Host vNoneHost2 = makeHost(MAC8, VLAN_NONE, OF5P3);
-    private final Host vNoneHost3 = makeHost(MAC9, VLAN_NONE, OF4P3);
-
-    private final Set<Host> availableHosts = ImmutableSet.of(v100Host1,
-                                                             v100Host2,
-                                                             v200Host1,
-                                                             v300Host1,
-                                                             v200Host2,
-                                                             v400Host1,
-                                                             vNoneHost1,
-                                                             vNoneHost2,
-                                                             vNoneHost3);
-
-    private final Set<Interface> availableInterfaces =
-            ImmutableSet.of(V100H1, V100H2, V200H1, V200H2, V300H1,
-                            V400H1, VNONEH1, VNONEH2, VNONEH3);
-
     private VplsNeighbourHandler vplsNeighbourHandler;
-
     private HostService hostService;
 
     /**
@@ -167,29 +67,46 @@
     @Before
     public void setUp() {
         vplsNeighbourHandler = new VplsNeighbourHandler();
-        SetMultimap<String, Interface> ifacesByVpls =
-                HashMultimap.create();
-        ifacesByVpls.put(VPLS1, V100H1);
-        ifacesByVpls.put(VPLS1, V200H1);
-        ifacesByVpls.put(VPLS1, V300H1);
-        ifacesByVpls.put(VPLS2, V100H2);
-        ifacesByVpls.put(VPLS2, V200H2);
-        ifacesByVpls.put(VPLS3, VNONEH1);
-        ifacesByVpls.put(VPLS3, VNONEH2);
-        ifacesByVpls.put(VPLS4, V400H1);
-        ifacesByVpls.put(VPLS4, VNONEH3);
-        HashMap<String, EncapsulationType> encap = Maps.newHashMap();
-        vplsNeighbourHandler.vplsConfigService =
-                new TestVplsConfigService(ifacesByVpls, encap);
-        vplsNeighbourHandler.interfaceService =
-                new TestInterfaceService();
-        vplsNeighbourHandler.neighbourService =
-                new TestNeighbourService();
         hostService = new TestHostService();
+        vplsNeighbourHandler.vplsStore = new TestVplsStore();
+        vplsNeighbourHandler.interfaceService = new TestInterfaceService();
+        vplsNeighbourHandler.neighbourService = new TestNeighbourService();
+        vplsNeighbourHandler.coreService = new TestCoreService();
+        vplsNeighbourHandler.configService = new TestConfigService();
+
+        // Init VPLS store
+        VplsData vplsData = VplsData.of(VPLS1);
+        vplsData.addInterfaces(ImmutableSet.of(V100H1, V200H1, V300H1));
+        vplsNeighbourHandler.vplsStore.addVpls(vplsData);
+
+        vplsData = VplsData.of(VPLS2);
+        vplsData.addInterfaces(ImmutableSet.of(V100H2, V200H2));
+        vplsNeighbourHandler.vplsStore.addVpls(vplsData);
+
+        vplsData = VplsData.of(VPLS3);
+        vplsData.addInterfaces(ImmutableSet.of(VNONEH1, VNONEH2));
+        vplsNeighbourHandler.vplsStore.addVpls(vplsData);
+
+        vplsData = VplsData.of(VPLS4);
+        vplsData.addInterfaces(ImmutableSet.of(V400H1, VNONEH3));
+        vplsNeighbourHandler.vplsStore.addVpls(vplsData);
+
+        vplsNeighbourHandler.activate();
+
     }
 
     @After
     public void tearDown() {
+        vplsNeighbourHandler.deactivate();
+    }
+
+    /**
+     * Registers neighbour handler to all available interfaces.
+     */
+    @Test
+    public void testConfigNeighbourHandler() {
+        vplsNeighbourHandler.configNeighbourHandler();
+        assertEquals(9, vplsNeighbourHandler.neighbourService.getHandlerRegistrations().size());
     }
 
     /**
@@ -200,21 +117,21 @@
     public void vpls1RequestMessage() {
         // Request messages from v100h1 (VPLS 1) should be received by v200h1 and v300h1
         TestMessageContext requestMessage =
-                makeBroadcastRequestContext(v100Host1);
+                makeBroadcastRequestContext(V100HOST1);
         Set<Interface> expectInterfaces = ImmutableSet.of(V200H1, V300H1);
-        vplsNeighbourHandler.handleRequest(requestMessage);
+        ((TestNeighbourService) vplsNeighbourHandler.neighbourService).sendNeighourMessage(requestMessage);
         assertEquals(IFACES_NOT_EXPECTED, expectInterfaces, requestMessage.forwardResults);
 
         // Request messages from v200h1 (VPLS 1) should be received by v100h1 and v300h1
-        requestMessage = makeBroadcastRequestContext(v200Host1);
+        requestMessage = makeBroadcastRequestContext(V200HOST1);
         expectInterfaces = ImmutableSet.of(V100H1, V300H1);
-        vplsNeighbourHandler.handleRequest(requestMessage);
+        ((TestNeighbourService) vplsNeighbourHandler.neighbourService).sendNeighourMessage(requestMessage);
         assertEquals(IFACES_NOT_EXPECTED, expectInterfaces, requestMessage.forwardResults);
 
         // Request from v300h1 (VPLS 1) should be received by v100h1 and v200h1
-        requestMessage = makeBroadcastRequestContext(v300Host1);
+        requestMessage = makeBroadcastRequestContext(V300HOST1);
         expectInterfaces = ImmutableSet.of(V100H1, V200H1);
-        vplsNeighbourHandler.handleRequest(requestMessage);
+        ((TestNeighbourService) vplsNeighbourHandler.neighbourService).sendNeighourMessage(requestMessage);
         assertEquals(IFACES_NOT_EXPECTED, expectInterfaces, requestMessage.forwardResults);
     }
 
@@ -226,15 +143,15 @@
     public void vpls2RequestMessage() {
         // Request messages from v100h2 (VPLS 2) should be received by v200h2
         TestMessageContext requestMessage =
-                makeBroadcastRequestContext(v100Host2);
+                makeBroadcastRequestContext(V100HOST2);
         Set<Interface> expectInterfaces = ImmutableSet.of(V200H2);
-        vplsNeighbourHandler.handleRequest(requestMessage);
+        ((TestNeighbourService) vplsNeighbourHandler.neighbourService).sendNeighourMessage(requestMessage);
         assertEquals(IFACES_NOT_EXPECTED, expectInterfaces, requestMessage.forwardResults);
 
         // Request messages from v200h2 (VPLS 2) should be received by v100h2
-        requestMessage = makeBroadcastRequestContext(v200Host2);
+        requestMessage = makeBroadcastRequestContext(V200HOST2);
         expectInterfaces = ImmutableSet.of(V100H2);
-        vplsNeighbourHandler.handleRequest(requestMessage);
+        ((TestNeighbourService) vplsNeighbourHandler.neighbourService).sendNeighourMessage(requestMessage);
         assertEquals(IFACES_NOT_EXPECTED, expectInterfaces, requestMessage.forwardResults);
     }
 
@@ -246,17 +163,17 @@
      */
     @Test
     public void vpls3RequestMessage() {
-        // Request messages from vNoneHost1 (VPLS 3) should be received by vNoneHost2
+        // Request messages from VNONEHOST1 (VPLS 3) should be received by VNONEHOST2
         TestMessageContext requestMessage =
-                makeBroadcastRequestContext(vNoneHost1);
+                makeBroadcastRequestContext(VNONEHOST1);
         Set<Interface> expectInterfaces = ImmutableSet.of(VNONEH2);
-        vplsNeighbourHandler.handleRequest(requestMessage);
+        ((TestNeighbourService) vplsNeighbourHandler.neighbourService).sendNeighourMessage(requestMessage);
         assertEquals(IFACES_NOT_EXPECTED, expectInterfaces, requestMessage.forwardResults);
 
         // Request messages from vNoneh2 (VPLS 3) should be received by vNoneh1
-        requestMessage = makeBroadcastRequestContext(vNoneHost2);
+        requestMessage = makeBroadcastRequestContext(VNONEHOST2);
         expectInterfaces = ImmutableSet.of(VNONEH1);
-        vplsNeighbourHandler.handleRequest(requestMessage);
+        ((TestNeighbourService) vplsNeighbourHandler.neighbourService).sendNeighourMessage(requestMessage);
         assertEquals(IFACES_NOT_EXPECTED, expectInterfaces, requestMessage.forwardResults);
     }
 
@@ -268,17 +185,17 @@
      */
     @Test
     public void vpls4RequestMessage() {
-        // Request messages from v400Host1 (VPLS 4) should be received by vNoneHost3
+        // Request messages from V400HOST1 (VPLS 4) should be received by VNONEHOST3
         TestMessageContext requestMessage =
-                makeBroadcastRequestContext(v400Host1);
+                makeBroadcastRequestContext(V400HOST1);
         Set<Interface> expectInterfaces = ImmutableSet.of(VNONEH3);
-        vplsNeighbourHandler.handleRequest(requestMessage);
+        ((TestNeighbourService) vplsNeighbourHandler.neighbourService).sendNeighourMessage(requestMessage);
         assertEquals(IFACES_NOT_EXPECTED, expectInterfaces, requestMessage.forwardResults);
 
-        // Request messages from vNoneHost3 (VPLS 4) should be received by v400Host1
-        requestMessage = makeBroadcastRequestContext(vNoneHost3);
+        // Request messages from VNONEHOST3 (VPLS 4) should be received by V400HOST1
+        requestMessage = makeBroadcastRequestContext(VNONEHOST3);
         expectInterfaces = ImmutableSet.of(V400H1);
-        vplsNeighbourHandler.handleRequest(requestMessage);
+        ((TestNeighbourService) vplsNeighbourHandler.neighbourService).sendNeighourMessage(requestMessage);
         assertEquals(IFACES_NOT_EXPECTED, expectInterfaces, requestMessage.forwardResults);
     }
 
@@ -291,21 +208,21 @@
     public void vpls1ReplyMessage() {
         // Reply messages from v100h1 (VPLS 1) should be received by v200h1
         TestMessageContext replyMessage =
-                makeReplyContext(v100Host1, v200Host1);
+                makeReplyContext(V100HOST1, V200HOST1);
         Set<Interface> expectInterfaces = ImmutableSet.of(V200H1);
-        vplsNeighbourHandler.handleReply(replyMessage, hostService);
+        ((TestNeighbourService) vplsNeighbourHandler.neighbourService).sendNeighourMessage(replyMessage);
         assertEquals(IFACES_NOT_EXPECTED, expectInterfaces, replyMessage.forwardResults);
 
         // Reply messages from v200h1 (VPLS 1) should be received by v300h1
-        replyMessage = makeReplyContext(v200Host1, v300Host1);
+        replyMessage = makeReplyContext(V200HOST1, V300HOST1);
         expectInterfaces = ImmutableSet.of(V300H1);
-        vplsNeighbourHandler.handleReply(replyMessage, hostService);
+        ((TestNeighbourService) vplsNeighbourHandler.neighbourService).sendNeighourMessage(replyMessage);
         assertEquals(IFACES_NOT_EXPECTED, expectInterfaces, replyMessage.forwardResults);
 
         // Reply messages from v300h1 (VPLS 1) should be received by v100h1
-        replyMessage = makeReplyContext(v300Host1, v100Host1);
+        replyMessage = makeReplyContext(V300HOST1, V100HOST1);
         expectInterfaces = ImmutableSet.of(V100H1);
-        vplsNeighbourHandler.handleReply(replyMessage, hostService);
+        ((TestNeighbourService) vplsNeighbourHandler.neighbourService).sendNeighourMessage(replyMessage);
         assertEquals(IFACES_NOT_EXPECTED, expectInterfaces, replyMessage.forwardResults);
     }
 
@@ -318,15 +235,15 @@
     public void vpls2ReplyMessage() {
         // Reply messages from v100h2 (VPLS 2) should be received by v200h2
         TestMessageContext replyMessage =
-                makeReplyContext(v100Host2, v200Host2);
+                makeReplyContext(V100HOST2, V200HOST2);
         Set<Interface> expectInterfaces = ImmutableSet.of(V200H2);
-        vplsNeighbourHandler.handleReply(replyMessage, hostService);
+        ((TestNeighbourService) vplsNeighbourHandler.neighbourService).sendNeighourMessage(replyMessage);
         assertEquals(IFACES_NOT_EXPECTED, expectInterfaces, replyMessage.forwardResults);
 
         // Reply messages from v200h2 (VPLS 2) should be received by v100h2
-        replyMessage = makeReplyContext(v200Host2, v100Host2);
+        replyMessage = makeReplyContext(V200HOST2, V100HOST2);
         expectInterfaces = ImmutableSet.of(V100H2);
-        vplsNeighbourHandler.handleReply(replyMessage, hostService);
+        ((TestNeighbourService) vplsNeighbourHandler.neighbourService).sendNeighourMessage(replyMessage);
         assertEquals(IFACES_NOT_EXPECTED, expectInterfaces, replyMessage.forwardResults);
     }
 
@@ -339,15 +256,15 @@
     public void vpls3ReplyMessage() {
         // Reply messages from vNoneh1 (VPLS 3) should be received by vNoneh2
         TestMessageContext replyMessage =
-                makeReplyContext(vNoneHost1, vNoneHost2);
+                makeReplyContext(VNONEHOST1, VNONEHOST2);
         Set<Interface> expectInterfaces = ImmutableSet.of(VNONEH2);
-        vplsNeighbourHandler.handleReply(replyMessage, hostService);
+        ((TestNeighbourService) vplsNeighbourHandler.neighbourService).sendNeighourMessage(replyMessage);
         assertEquals(IFACES_NOT_EXPECTED, expectInterfaces, replyMessage.forwardResults);
 
         // Reply messages from vNoneh2 (VPLS 3) should be received by vNoneh1
-        replyMessage = makeReplyContext(vNoneHost2, vNoneHost1);
+        replyMessage = makeReplyContext(VNONEHOST2, VNONEHOST1);
         expectInterfaces = ImmutableSet.of(VNONEH1);
-        vplsNeighbourHandler.handleReply(replyMessage, hostService);
+        ((TestNeighbourService) vplsNeighbourHandler.neighbourService).sendNeighourMessage(replyMessage);
         assertEquals(IFACES_NOT_EXPECTED, expectInterfaces, replyMessage.forwardResults);
     }
 
@@ -360,15 +277,15 @@
     public void vpls4ReplyMessage() {
         // Reply messages from v400h1 (VPLS 4) should be received by vNoneh3
         TestMessageContext replyMessage =
-                makeReplyContext(v400Host1, vNoneHost3);
+                makeReplyContext(V400HOST1, VNONEHOST3);
         Set<Interface> expectInterfaces = ImmutableSet.of(VNONEH3);
-        vplsNeighbourHandler.handleReply(replyMessage, hostService);
+        ((TestNeighbourService) vplsNeighbourHandler.neighbourService).sendNeighourMessage(replyMessage);
         assertEquals(IFACES_NOT_EXPECTED, expectInterfaces, replyMessage.forwardResults);
 
         // Reply messages from vNoneh3 (VPLS 4) should be received by v400h1
-        replyMessage = makeReplyContext(vNoneHost3, v400Host1);
+        replyMessage = makeReplyContext(VNONEHOST3, V400HOST1);
         expectInterfaces = ImmutableSet.of(V400H1);
-        vplsNeighbourHandler.handleReply(replyMessage, hostService);
+        ((TestNeighbourService) vplsNeighbourHandler.neighbourService).sendNeighourMessage(replyMessage);
         assertEquals(IFACES_NOT_EXPECTED, expectInterfaces, replyMessage.forwardResults);
     }
 
@@ -381,52 +298,56 @@
     public void wrongReplyMessage() {
         // Reply message from v100h1 (VPLS 1) to v100h2 (VPLS 2).
         // Forward results should be empty
-        TestMessageContext replyMessage = makeReplyContext(v100Host1, v100Host2);
+        TestMessageContext replyMessage = makeReplyContext(V100HOST1, V100HOST2);
         Set<Interface> expectInterfaces = ImmutableSet.of();
-        vplsNeighbourHandler.handleReply(replyMessage, hostService);
+        ((TestNeighbourService) vplsNeighbourHandler.neighbourService).sendNeighourMessage(replyMessage);
         assertEquals(IFACES_NOT_EXPECTED, expectInterfaces, replyMessage.forwardResults);
 
         // Reply message from v200h2 (VPLS 2) to v300h1 (VPLS 1).
         // Forward results should be empty
-        replyMessage = makeReplyContext(v200Host2, v300Host1);
+        replyMessage = makeReplyContext(V200HOST2, V300HOST1);
         expectInterfaces = ImmutableSet.of();
-        vplsNeighbourHandler.handleReply(replyMessage, hostService);
+        ((TestNeighbourService) vplsNeighbourHandler.neighbourService).sendNeighourMessage(replyMessage);
         assertEquals(IFACES_NOT_EXPECTED, expectInterfaces, replyMessage.forwardResults);
 
         // Reply message from vNoneh1 (VPLS 3) to v400h1 (VPLS 4).
         // Forward results should be empty
-        replyMessage = makeReplyContext(vNoneHost1, v400Host1);
+        replyMessage = makeReplyContext(VNONEHOST1, V400HOST1);
         expectInterfaces = ImmutableSet.of();
-        vplsNeighbourHandler.handleReply(replyMessage, hostService);
+        ((TestNeighbourService) vplsNeighbourHandler.neighbourService).sendNeighourMessage(replyMessage);
         assertEquals(IFACES_NOT_EXPECTED, expectInterfaces, replyMessage.forwardResults);
 
         // Reply message from vNoneh3 (VPLS 4) to vNoneH2 (VPLS 3).
         // Forward results should be empty
-        replyMessage = makeReplyContext(vNoneHost3, vNoneHost2);
+        replyMessage = makeReplyContext(VNONEHOST3, VNONEHOST2);
         expectInterfaces = ImmutableSet.of();
-        vplsNeighbourHandler.handleReply(replyMessage, hostService);
+        ((TestNeighbourService) vplsNeighbourHandler.neighbourService).sendNeighourMessage(replyMessage);
         assertEquals(IFACES_NOT_EXPECTED, expectInterfaces, replyMessage.forwardResults);
     }
 
     /**
-     * Returns the device Id of the ith device.
-     *
-     * @param i the device to get the Id of
-     * @return the device Id
+     * Sends reply and request message from a host which not related to any VPLS.
      */
-    private static DeviceId getDeviceId(int i) {
-        return DeviceId.deviceId("" + i);
+    @Test
+    public void testVplsNotfound() {
+        TestMessageContext replyMessage = makeReplyContext(V300HOST2, V100HOST1);
+        Set<Interface> expectInterfaces = ImmutableSet.of();
+        ((TestNeighbourService) vplsNeighbourHandler.neighbourService).sendNeighourMessage(replyMessage);
+        assertEquals(IFACES_NOT_EXPECTED, expectInterfaces, replyMessage.forwardResults);
+        assertTrue(replyMessage.dropped());
+
+        TestMessageContext requestMessage = makeBroadcastRequestContext(V300HOST2);
+        ((TestNeighbourService) vplsNeighbourHandler.neighbourService).sendNeighourMessage(requestMessage);
+        assertEquals(IFACES_NOT_EXPECTED, expectInterfaces, requestMessage.forwardResults);
+        assertTrue(requestMessage.dropped());
     }
 
-    private Host makeHost(MacAddress mac, VlanId vlan, ConnectPoint cp) {
-        return new DefaultHost(PID,
-                               HostId.hostId(mac, vlan),
-                               mac,
-                               vlan,
-                               new HostLocation(cp, 0),
-                               Sets.newHashSet());
-    }
-
+    /**
+     * Generates broadcast request message context by given source host.
+     *
+     * @param host the source host
+     * @return the request message context
+     */
     private TestMessageContext makeBroadcastRequestContext(Host host) {
         return new TestMessageContext(host.location(),
                                       host.mac(),
@@ -435,6 +356,13 @@
                                       NeighbourMessageType.REQUEST);
     }
 
+    /**
+     * Generates reply message context by given source and destination host.
+     *
+     * @param src the source host
+     * @param dst the destination host
+     * @return the reply message context
+     */
     private TestMessageContext makeReplyContext(Host src, Host dst) {
         return new TestMessageContext(src.location(),
                                       src.mac(),
@@ -443,15 +371,16 @@
                                       NeighbourMessageType.REPLY);
     }
 
+    /**
+     * Test message context.
+     */
     private class TestMessageContext implements NeighbourMessageContext {
-
-
         private final NeighbourMessageType type;
         private final MacAddress srcMac;
         private final MacAddress dstMac;
         private final ConnectPoint inPort;
         private final VlanId vlanId;
-
+        private boolean dropped = false;
         public Set<Interface> forwardResults;
 
         /**
@@ -475,8 +404,8 @@
             this.dstMac = dstMac;
             this.vlanId = vlanId;
             this.type = type;
-
             this.forwardResults = Sets.newHashSet();
+            this.dropped = false;
         }
 
         @Override
@@ -518,6 +447,10 @@
         public void forward(ConnectPoint outPort) {
         }
 
+        /**
+         * Records all forward network interface information.
+         * @param outIntf output interface
+         */
         @Override
         public void forward(Interface outIntf) {
             forwardResults.add(outIntf);
@@ -533,6 +466,7 @@
 
         @Override
         public void drop() {
+            this.dropped = true;
         }
 
         @Override
@@ -544,141 +478,16 @@
         public NeighbourProtocol protocol() {
             return null;
         }
-    }
 
-    private class TestVplsConfigService extends VplsConfigServiceAdapter {
-
-        private final SetMultimap<String, Interface> ifacesByVplsName;
-
-        public TestVplsConfigService(SetMultimap<String, Interface> ifacesByVplsName,
-                                     HashMap<String, EncapsulationType> encapByVplsName) {
-            this.ifacesByVplsName = ifacesByVplsName;
-        }
-
-        @Override
-        public void addVpls(String vplsName, Set<String> ifaceNames, String encap) {
-            if (!ifacesByVplsName.containsKey(vplsName)) {
-                ifaceNames.forEach(ifaceName -> {
-                    availableInterfaces.forEach(iface -> {
-                        if (iface.name().equals(ifaceName)) {
-                            ifacesByVplsName.put(vplsName, iface);
-                        }
-                    });
-                });
-            }
-        }
-
-        @Override
-        public void removeVpls(String vplsName) {
-            if (ifacesByVplsName.containsKey(vplsName)) {
-                ifacesByVplsName.removeAll(vplsName);
-            }
-        }
-
-        @Override
-        public void addIface(String vplsName, String ifaceName) {
-            availableInterfaces.forEach(intf -> {
-                if (intf.name().equals(ifaceName)) {
-                    ifacesByVplsName.put(vplsName, intf);
-                }
-            });
-        }
-
-        @Override
-        public void removeIface(String ifaceName) {
-            SetMultimap<String, Interface> toBeRemoved = HashMultimap.create();
-            ifacesByVplsName.entries().forEach(e -> {
-                if (e.getValue().name().equals(ifaceName)) {
-                    toBeRemoved.put(e.getKey(), e.getValue());
-                }
-            });
-            toBeRemoved.entries()
-                    .forEach(e -> ifacesByVplsName.remove(e.getKey(),
-                                                          e.getValue()));
-        }
-
-        @Override
-        public void cleanVplsConfig() {
-            ifacesByVplsName.clear();
-        }
-
-        @Override
-        public Set<Interface> allIfaces() {
-            return ImmutableSet.copyOf(ifacesByVplsName.values());
-        }
-
-        @Override
-        public Set<Interface> ifaces(String name) {
-            return ifacesByVplsName.get(name)
-                    .stream()
-                    .collect(Collectors.toSet());
-        }
-
-        @Override
-        public Set<String> vplsNames() {
-            return ifacesByVplsName.keySet();
-        }
-
-        @Override
-        public SetMultimap<String, Interface> ifacesByVplsName() {
-            return ImmutableSetMultimap.copyOf(ifacesByVplsName);
-        }
-
-        @Override
-        public SetMultimap<String, Interface> ifacesByVplsName(VlanId vlan,
-                                                               ConnectPoint connectPoint) {
-            String vplsName =
-                    ifacesByVplsName.entries().stream()
-                            .filter(e -> e.getValue().connectPoint().equals(connectPoint))
-                            .filter(e -> e.getValue().vlan().equals(vlan))
-                            .map(Map.Entry::getKey)
-                            .findFirst()
-                            .orElse(null);
-            SetMultimap<String, Interface> result = HashMultimap.create();
-            if (vplsName != null &&
-                    ifacesByVplsName.containsKey(vplsName)) {
-                ifacesByVplsName.get(vplsName)
-                        .forEach(intf -> result.put(vplsName, intf));
-                return result;
-            }
-            return null;
+        public boolean dropped() {
+            return dropped;
         }
     }
 
-    class TestHostService extends HostServiceAdapter {
-        @Override
-        public Set<Host> getHostsByMac(MacAddress mac) {
-            return availableHosts.stream()
-                    .filter(host -> host.mac().equals(mac))
-                    .collect(Collectors.toSet());
-        }
-
-        @Override
-        public Iterable<Host> getHosts() {
-            return availableHosts;
-        }
-
-        @Override
-        public Set<Host> getHostsByVlan(VlanId vlanId) {
-            return availableHosts.stream()
-                    .filter(host -> host.vlan().equals(vlanId))
-                    .collect(Collectors.toSet());
-        }
-
-        @Override
-        public int getHostCount() {
-            return availableHosts.size();
-        }
-
-        @Override
-        public Host getHost(HostId hostId) {
-            return availableHosts.stream()
-                    .filter(host -> host.id().equals(hostId))
-                    .findFirst()
-                    .orElse(null);
-        }
-    }
-
+    /**
+     * Test neighbour service; records all registrations between neighbour
+     * message handler and interfaces.
+     */
     private class TestNeighbourService implements NeighbourResolutionService {
         private SetMultimap<ConnectPoint, NeighbourHandlerRegistration> handlerRegs;
 
@@ -732,6 +541,26 @@
             return handlerRegs.asMap();
         }
 
+        /**
+         * Sends neighbour message context to all handler which related to the
+         * context.
+         *
+         * @param context the neighbour message context
+         */
+        public void sendNeighourMessage(NeighbourMessageContext context) {
+            ConnectPoint connectPoint = context.inPort();
+            VlanId vlanId = context.vlan();
+            Collection<NeighbourHandlerRegistration> registrations = handlerRegs.get(connectPoint);
+            registrations.forEach(reg -> {
+                if (reg.intf().vlan().equals(vlanId)) {
+                    reg.handler().handleMessage(context, hostService);
+                }
+            });
+        }
+
+        /**
+         * Test handler registration.
+         */
         private class HandlerRegistration implements NeighbourHandlerRegistration {
             private final Interface intf;
             private final NeighbourMessageHandler handler;
@@ -767,65 +596,4 @@
             }
         }
     }
-
-    class TestInterfaceService implements InterfaceService {
-
-        @Override
-        public void addListener(InterfaceListener listener) {
-        }
-
-        @Override
-        public void removeListener(InterfaceListener listener) {
-        }
-
-        @Override
-        public Set<Interface> getInterfaces() {
-            return availableInterfaces;
-        }
-
-        @Override
-        public Interface getInterfaceByName(ConnectPoint connectPoint,
-                                            String name) {
-            return availableInterfaces.stream()
-                    .filter(intf -> intf.name().equals(name))
-                    .findFirst()
-                    .orElse(null);
-        }
-
-        @Override
-        public Set<Interface> getInterfacesByPort(ConnectPoint port) {
-            return availableInterfaces.stream()
-                    .filter(intf -> intf.connectPoint().equals(port))
-                    .collect(Collectors.toSet());
-        }
-
-        @Override
-        public Set<Interface> getInterfacesByIp(IpAddress ip) {
-            return availableInterfaces.stream()
-                    .filter(intf -> intf.ipAddressesList().contains(ip))
-                    .collect(Collectors.toSet());
-        }
-
-        @Override
-        public Set<Interface> getInterfacesByVlan(VlanId vlan) {
-            return availableInterfaces.stream()
-                    .filter(intf -> intf.vlan().equals(vlan))
-                    .collect(Collectors.toSet());
-        }
-
-        @Override
-        public Interface getMatchingInterface(IpAddress ip) {
-            return availableInterfaces.stream()
-                    .filter(intf -> intf.ipAddressesList().contains(ip))
-                    .findFirst()
-                    .orElse(null);
-        }
-
-        @Override
-        public Set<Interface> getMatchingInterfaces(IpAddress ip) {
-            return availableInterfaces.stream()
-                    .filter(intf -> intf.ipAddressesList().contains(ip))
-                    .collect(Collectors.toSet());
-        }
-    }
 }
diff --git a/apps/vpls/src/test/java/org/onosproject/vpls/VplsOperationManagerTest.java b/apps/vpls/src/test/java/org/onosproject/vpls/VplsOperationManagerTest.java
new file mode 100644
index 0000000..36ffda9
--- /dev/null
+++ b/apps/vpls/src/test/java/org/onosproject/vpls/VplsOperationManagerTest.java
@@ -0,0 +1,543 @@
+/*
+ * Copyright 2017-present Open Networking Laboratory
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onosproject.vpls;
+
+import com.google.common.collect.ImmutableList;
+import com.google.common.collect.ImmutableSet;
+import com.google.common.collect.Sets;
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+import org.onosproject.cluster.ClusterServiceAdapter;
+import org.onosproject.cluster.Leader;
+import org.onosproject.cluster.Leadership;
+import org.onosproject.cluster.LeadershipEvent;
+import org.onosproject.net.ConnectPoint;
+import org.onosproject.net.EncapsulationType;
+import org.onosproject.net.Host;
+import org.onosproject.net.host.HostServiceAdapter;
+import org.onosproject.net.intent.Intent;
+import org.onosproject.net.intent.IntentData;
+import org.onosproject.net.intent.IntentEvent;
+import org.onosproject.net.intent.IntentState;
+import org.onosproject.store.service.WallClockTimestamp;
+import org.onosproject.vpls.api.VplsData;
+import org.onosproject.vpls.api.VplsOperation;
+
+import java.util.ArrayDeque;
+import java.util.Collection;
+import java.util.Deque;
+import java.util.Set;
+
+import static org.junit.Assert.*;
+import static org.onlab.junit.TestTools.assertAfter;
+import static org.onlab.junit.TestTools.delay;
+
+/**
+ * Tests for {@link VplsOperationManager}.
+ */
+public class VplsOperationManagerTest extends VplsTest {
+
+    VplsOperationManager vplsOperationManager;
+    private static final int OPERATION_DELAY = 1000;
+    private static final int OPERATION_DURATION = 1500;
+
+    @Before
+    public void setup() {
+        if (idGenerator == null) {
+            idGenerator = new TestIdGenerator();
+        }
+        Intent.unbindIdGenerator(idGenerator);
+        Intent.bindIdGenerator(idGenerator);
+        vplsOperationManager = new VplsOperationManager();
+        vplsOperationManager.coreService = new TestCoreService();
+        vplsOperationManager.intentService = new TestIntentService();
+        vplsOperationManager.leadershipService = new TestLeadershipService();
+        vplsOperationManager.clusterService = new ClusterServiceAdapter();
+        vplsOperationManager.hostService = new TestHostService();
+        vplsOperationManager.vplsStore = new TestVplsStore();
+        vplsOperationManager.isLeader = true;
+        vplsOperationManager.activate();
+    }
+
+    @After
+    public void tearDown() {
+        vplsOperationManager.deactivate();
+    }
+
+    /**
+     * Sends leadership event to the manager and checks if the manager is
+     * leader or not.
+     */
+    @Test
+    public void testLeadershipEvent() {
+        vplsOperationManager.isLeader = false;
+        vplsOperationManager.localNodeId = NODE_ID_1;
+
+        // leader changed to self
+        Leader leader = new Leader(NODE_ID_1, 0, 0);
+        Leadership leadership = new Leadership(APP_NAME, leader, ImmutableList.of());
+        LeadershipEvent event = new LeadershipEvent(LeadershipEvent.Type.LEADER_CHANGED, leadership);
+        ((TestLeadershipService) vplsOperationManager.leadershipService).sendEvent(event);
+        assertTrue(vplsOperationManager.isLeader);
+
+        // leader changed to other
+        leader = new Leader(NODE_ID_2, 0, 0);
+        leadership = new Leadership(APP_NAME, leader, ImmutableList.of());
+        event = new LeadershipEvent(LeadershipEvent.Type.LEADER_CHANGED, leadership);
+        ((TestLeadershipService) vplsOperationManager.leadershipService).sendEvent(event);
+        assertFalse(vplsOperationManager.isLeader);
+    }
+
+    /**
+     * Submits an ADD operation to the operation manager; check if the VPLS
+     * store changed after a period.
+     */
+    @Test
+    public void testSubmitAddOperation() {
+        VplsData vplsData = VplsData.of(VPLS1);
+        vplsData.addInterfaces(ImmutableSet.of(V100H1, V100H2));
+
+        VplsOperation vplsOperation = VplsOperation.of(vplsData,
+                                                       VplsOperation.Operation.ADD);
+
+        vplsOperationManager.submit(vplsOperation);
+        assertAfter(OPERATION_DELAY, OPERATION_DURATION, () -> {
+            Collection<VplsData> vplss = vplsOperationManager.vplsStore.getAllVpls();
+            assertEquals(1, vplss.size());
+            VplsData result = vplss.iterator().next();
+
+            assertEquals(vplsData, result);
+            assertEquals(VplsData.VplsState.ADDED, result.state());
+
+            Set<Intent> intentsInstalled =
+                    Sets.newHashSet(vplsOperationManager.intentService.getIntents());
+            assertEquals(4, intentsInstalled.size());
+        });
+    }
+
+    /**
+     * Submits an ADD operation to the operation manager; check the VPLS state
+     * from store if Intent install failed.
+     */
+    @Test
+    public void testSubmitAddOperationFail() {
+        vplsOperationManager.intentService = new AlwaysFailureIntentService();
+        VplsData vplsData = VplsData.of(VPLS1);
+        vplsData.addInterfaces(ImmutableSet.of(V100H1, V100H2));
+
+        VplsOperation vplsOperation = VplsOperation.of(vplsData,
+                                                       VplsOperation.Operation.ADD);
+        vplsOperationManager.submit(vplsOperation);
+        assertAfter(OPERATION_DELAY, OPERATION_DURATION, () -> {
+            Collection<VplsData> vplss = vplsOperationManager.vplsStore.getAllVpls();
+            assertEquals(1, vplss.size());
+            VplsData result = vplss.iterator().next();
+
+            assertEquals(vplsData, result);
+            assertEquals(VplsData.VplsState.FAILED, result.state());
+        });
+    }
+
+    /**
+     * Submits an REMOVE operation to the operation manager; check if the VPLS
+     * store changed after a period.
+     */
+    @Test
+    public void testSubmitRemoveOperation() {
+        VplsData vplsData = VplsData.of(VPLS1);
+        vplsData.addInterfaces(ImmutableSet.of(V100H1, V100H2));
+        vplsData.state(VplsData.VplsState.REMOVING);
+
+        VplsOperation vplsOperation = VplsOperation.of(vplsData,
+                                                       VplsOperation.Operation.REMOVE);
+
+        vplsOperationManager.submit(vplsOperation);
+
+        assertAfter(OPERATION_DELAY, OPERATION_DURATION, () -> {
+            Collection<VplsData> vplss = vplsOperationManager.vplsStore.getAllVpls();
+            assertEquals(0, vplss.size());
+        });
+    }
+
+    /**
+     * Submits an UPDATE operation with VPLS interface update to the operation manager; check if the VPLS
+     * store changed after a period.
+     */
+    @Test
+    public void testSubmitUpdateOperation() {
+        VplsData vplsData = VplsData.of(VPLS1);
+        vplsData.addInterfaces(ImmutableSet.of(V100H1));
+        vplsData.state(VplsData.VplsState.ADDED);
+        vplsOperationManager.vplsStore.addVpls(vplsData);
+
+        vplsData = VplsData.of(VPLS1, EncapsulationType.VLAN);
+        vplsData.addInterfaces(ImmutableSet.of(V100H1, V100H2));
+        vplsData.state(VplsData.VplsState.UPDATING);
+
+        VplsOperation vplsOperation = VplsOperation.of(vplsData,
+                                                       VplsOperation.Operation.UPDATE);
+
+        vplsOperationManager.submit(vplsOperation);
+
+        assertAfter(OPERATION_DELAY, OPERATION_DURATION, () -> {
+            Collection<VplsData> vplss = vplsOperationManager.vplsStore.getAllVpls();
+            VplsData result = vplss.iterator().next();
+            VplsData expected = VplsData.of(VPLS1, EncapsulationType.VLAN);
+            expected.addInterfaces(ImmutableSet.of(V100H1, V100H2));
+            expected.state(VplsData.VplsState.ADDED);
+
+            assertEquals(1, vplss.size());
+            assertEquals(expected, result);
+
+            Set<Intent> intentsInstalled =
+                    Sets.newHashSet(vplsOperationManager.intentService.getIntents());
+            assertEquals(4, intentsInstalled.size());
+        });
+    }
+
+    /**
+     * Submits an UPDATE operation with VPLS host update to the operation manager; check if the VPLS
+     * store changed after a period.
+     */
+    @Test
+    public void testSubmitUpdateHostOperation() {
+        vplsOperationManager.hostService = new EmptyHostService();
+        VplsData vplsData = VplsData.of(VPLS1);
+        vplsData.addInterfaces(ImmutableSet.of(V100H1, V100H2));
+
+        VplsOperation vplsOperation = VplsOperation.of(vplsData,
+                                                       VplsOperation.Operation.ADD);
+        vplsOperationManager.submit(vplsOperation);
+        delay(1000);
+        vplsOperationManager.hostService = new TestHostService();
+
+        vplsData = VplsData.of(VPLS1);
+        vplsData.addInterfaces(ImmutableSet.of(V100H1, V100H2));
+        vplsData.state(VplsData.VplsState.UPDATING);
+
+        vplsOperation = VplsOperation.of(vplsData,
+                                                       VplsOperation.Operation.UPDATE);
+
+        vplsOperationManager.submit(vplsOperation);
+
+        assertAfter(OPERATION_DELAY, OPERATION_DURATION, () -> {
+            Collection<VplsData> vplss = vplsOperationManager.vplsStore.getAllVpls();
+            VplsData result = vplss.iterator().next();
+            VplsData expected = VplsData.of(VPLS1);
+            expected.addInterfaces(ImmutableSet.of(V100H1, V100H2));
+            expected.state(VplsData.VplsState.ADDED);
+            assertEquals(1, vplss.size());
+            assertEquals(expected, result);
+
+            assertEquals(4, vplsOperationManager.intentService.getIntentCount());
+        });
+    }
+
+    /**
+     * Submits same operation twice to the manager; the manager should ignore
+     * duplicated operation.
+     */
+    @Test
+    public void testDuplicateOperationInQueue() {
+        VplsData vplsData = VplsData.of(VPLS1);
+        vplsData.addInterfaces(ImmutableSet.of(V100H1, V100H2));
+
+        VplsOperation vplsOperation = VplsOperation.of(vplsData,
+                                                       VplsOperation.Operation.ADD);
+
+        vplsOperationManager.submit(vplsOperation);
+        vplsOperationManager.submit(vplsOperation);
+        Deque<VplsOperation> opQueue = vplsOperationManager.pendingVplsOperations.get(VPLS1);
+        assertEquals(1, opQueue.size());
+
+        // Clear operation queue before scheduler process it
+        opQueue.clear();
+    }
+
+    /**
+     * Submits REMOVE operation after submits ADD operation; there should be no
+     * pending or running operation in the manager.
+     */
+    @Test
+    public void testDoNothingOperation() {
+        VplsData vplsData = VplsData.of(VPLS1);
+        vplsData.addInterfaces(ImmutableSet.of(V100H1, V100H2));
+
+        VplsOperation vplsOperation = VplsOperation.of(vplsData,
+                                                       VplsOperation.Operation.ADD);
+        vplsOperationManager.submit(vplsOperation);
+        vplsOperation = VplsOperation.of(vplsData,
+                                         VplsOperation.Operation.REMOVE);
+        vplsOperationManager.submit(vplsOperation);
+        assertAfter(OPERATION_DELAY, OPERATION_DURATION, () -> {
+            assertEquals(0, vplsOperationManager.pendingVplsOperations.size());
+
+            // Should not have any running operation
+            assertEquals(0, vplsOperationManager.runningOperations.size());
+        });
+    }
+
+    /**
+     * Optimize operations which don't need to be optimized.
+     */
+    @Test
+    public void testOptimizeOperationsNoOptimize() {
+        // empty queue
+        Deque<VplsOperation> operations = new ArrayDeque<>();
+        VplsOperation vplsOperation =
+                VplsOperationManager.getOptimizedVplsOperation(operations);
+        assertNull(vplsOperation);
+
+        // one operation
+        VplsData vplsData = VplsData.of(VPLS1);
+        vplsOperation = VplsOperation.of(vplsData, VplsOperation.Operation.ADD);
+        operations.add(vplsOperation);
+        VplsOperation result =
+                VplsOperationManager.getOptimizedVplsOperation(operations);
+        assertEquals(vplsOperation, result);
+
+    }
+
+    /**
+     * Optimize operations with first is ADD operation and last is also ADD
+     * operation.
+     */
+    @Test
+    public void testOptimizeOperationsAToA() {
+        Deque<VplsOperation> operations = new ArrayDeque<>();
+        VplsData vplsData = VplsData.of(VPLS1);
+        vplsData.addInterfaces(ImmutableSet.of(V100H1));
+        VplsOperation vplsOperation = VplsOperation.of(vplsData,
+                                                       VplsOperation.Operation.ADD);
+        operations.add(vplsOperation);
+        vplsData = VplsData.of(VPLS1, EncapsulationType.VLAN);
+        vplsData.addInterfaces(ImmutableSet.of(V100H1, V100H2));
+        vplsOperation = VplsOperation.of(vplsData,
+                                         VplsOperation.Operation.ADD);
+        operations.add(vplsOperation);
+        vplsOperation = VplsOperationManager.getOptimizedVplsOperation(operations);
+        assertEquals(VplsOperation.of(vplsData, VplsOperation.Operation.ADD), vplsOperation);
+    }
+
+    /**
+     * Optimize operations with first is ADD operation and last is REMOVE
+     * operation.
+     */
+    @Test
+    public void testOptimizeOperationsAToR() {
+        Deque<VplsOperation> operations = new ArrayDeque<>();
+        VplsData vplsData = VplsData.of(VPLS1);
+        vplsData.addInterfaces(ImmutableSet.of(V100H1));
+        VplsOperation vplsOperation = VplsOperation.of(vplsData,
+                                                       VplsOperation.Operation.ADD);
+        operations.add(vplsOperation);
+        vplsOperation = VplsOperation.of(vplsData,
+                                         VplsOperation.Operation.REMOVE);
+        operations.add(vplsOperation);
+        vplsOperation = VplsOperationManager.getOptimizedVplsOperation(operations);
+        assertNull(vplsOperation);
+    }
+
+    /**
+     * Optimize operations with first is ADD operation and last is UPDATE
+     * operation.
+     */
+    @Test
+    public void testOptimizeOperationsAToU() {
+        Deque<VplsOperation> operations = new ArrayDeque<>();
+        VplsData vplsData = VplsData.of(VPLS1);
+        vplsData.addInterfaces(ImmutableSet.of(V100H1));
+        VplsOperation vplsOperation = VplsOperation.of(vplsData,
+                                                       VplsOperation.Operation.ADD);
+        operations.add(vplsOperation);
+        vplsData = VplsData.of(VPLS1, EncapsulationType.VLAN);
+        vplsData.addInterfaces(ImmutableSet.of(V100H1, V100H2));
+        vplsOperation = VplsOperation.of(vplsData,
+                                         VplsOperation.Operation.UPDATE);
+        operations.add(vplsOperation);
+        vplsOperation = VplsOperationManager.getOptimizedVplsOperation(operations);
+        assertEquals(VplsOperation.of(vplsData, VplsOperation.Operation.ADD), vplsOperation);
+    }
+
+    /**
+     * Optimize operations with first is REMOVE operation and last is ADD
+     * operation.
+     */
+    @Test
+    public void testOptimizeOperationsRToA() {
+        Deque<VplsOperation> operations = new ArrayDeque<>();
+        VplsData vplsData = VplsData.of(VPLS1);
+        vplsData.addInterfaces(ImmutableSet.of(V100H1));
+        VplsOperation vplsOperation = VplsOperation.of(vplsData,
+                                                       VplsOperation.Operation.REMOVE);
+        operations.add(vplsOperation);
+        vplsData = VplsData.of(VPLS1, EncapsulationType.VLAN);
+        vplsData.addInterfaces(ImmutableSet.of(V100H1, V100H2));
+        vplsOperation = VplsOperation.of(vplsData,
+                                         VplsOperation.Operation.ADD);
+        operations.add(vplsOperation);
+        vplsOperation = VplsOperationManager.getOptimizedVplsOperation(operations);
+        assertEquals(VplsOperation.of(vplsData, VplsOperation.Operation.UPDATE), vplsOperation);
+    }
+
+    /**
+     * Optimize operations with first is REMOVE operation and last is also
+     * REMOVE operation.
+     */
+    @Test
+    public void testOptimizeOperationsRToR() {
+        Deque<VplsOperation> operations = new ArrayDeque<>();
+        VplsData vplsData = VplsData.of(VPLS1);
+        vplsData.addInterfaces(ImmutableSet.of(V100H1));
+        VplsOperation vplsOperation = VplsOperation.of(vplsData,
+                                                       VplsOperation.Operation.REMOVE);
+        operations.add(vplsOperation);
+        vplsData = VplsData.of(VPLS1, EncapsulationType.VLAN);
+        vplsData.addInterfaces(ImmutableSet.of(V100H1, V100H2));
+        vplsOperation = VplsOperation.of(vplsData,
+                                         VplsOperation.Operation.REMOVE);
+        operations.add(vplsOperation);
+        vplsOperation = VplsOperationManager.getOptimizedVplsOperation(operations);
+        vplsData = VplsData.of(VPLS1);
+        vplsData.addInterfaces(ImmutableSet.of(V100H1));
+        assertEquals(VplsOperation.of(vplsData, VplsOperation.Operation.REMOVE), vplsOperation);
+    }
+
+    /**
+     * Optimize operations with first is REMOVE operation and last is UPDATE
+     * operation.
+     */
+    @Test
+    public void testOptimizeOperationsRToU() {
+        Deque<VplsOperation> operations = new ArrayDeque<>();
+        VplsData vplsData = VplsData.of(VPLS1);
+        vplsData.addInterfaces(ImmutableSet.of(V100H1));
+        VplsOperation vplsOperation = VplsOperation.of(vplsData,
+                                                       VplsOperation.Operation.REMOVE);
+        operations.add(vplsOperation);
+        vplsData = VplsData.of(VPLS1, EncapsulationType.VLAN);
+        vplsData.addInterfaces(ImmutableSet.of(V100H1, V100H2));
+        vplsOperation = VplsOperation.of(vplsData,
+                                         VplsOperation.Operation.UPDATE);
+        operations.add(vplsOperation);
+        vplsOperation = VplsOperationManager.getOptimizedVplsOperation(operations);
+        assertEquals(VplsOperation.of(vplsData, VplsOperation.Operation.UPDATE), vplsOperation);
+    }
+
+    /**
+     * Optimize operations with first is UPDATE operation and last is ADD
+     * operation.
+     */
+    @Test
+    public void testOptimizeOperationsUToA() {
+        Deque<VplsOperation> operations = new ArrayDeque<>();
+        VplsData vplsData = VplsData.of(VPLS1);
+        vplsData.addInterfaces(ImmutableSet.of(V100H1));
+        VplsOperation vplsOperation = VplsOperation.of(vplsData,
+                                                       VplsOperation.Operation.UPDATE);
+        operations.add(vplsOperation);
+        vplsData = VplsData.of(VPLS1, EncapsulationType.VLAN);
+        vplsData.addInterfaces(ImmutableSet.of(V100H1, V100H2));
+        vplsOperation = VplsOperation.of(vplsData,
+                                         VplsOperation.Operation.ADD);
+        operations.add(vplsOperation);
+        vplsOperation = VplsOperationManager.getOptimizedVplsOperation(operations);
+        assertEquals(VplsOperation.of(vplsData, VplsOperation.Operation.UPDATE), vplsOperation);
+    }
+
+    /**
+     * Optimize operations with first is UPDATE operation and last is REMOVE
+     * operation.
+     */
+    @Test
+    public void testOptimizeOperationsUToR() {
+        Deque<VplsOperation> operations = new ArrayDeque<>();
+        VplsData vplsData = VplsData.of(VPLS1);
+        vplsData.addInterfaces(ImmutableSet.of(V100H1));
+        VplsOperation vplsOperation = VplsOperation.of(vplsData,
+                                                       VplsOperation.Operation.UPDATE);
+        operations.add(vplsOperation);
+        vplsData = VplsData.of(VPLS1, EncapsulationType.VLAN);
+        vplsData.addInterfaces(ImmutableSet.of(V100H1, V100H2));
+        vplsOperation = VplsOperation.of(vplsData,
+                                         VplsOperation.Operation.REMOVE);
+        operations.add(vplsOperation);
+        vplsOperation = VplsOperationManager.getOptimizedVplsOperation(operations);
+        assertEquals(VplsOperation.of(vplsData, VplsOperation.Operation.REMOVE), vplsOperation);
+    }
+
+    /**
+     * Optimize operations with first is UPDATE operation and last is also
+     * UPDATE operation.
+     */
+    @Test
+    public void testOptimizeOperationsUToU() {
+        Deque<VplsOperation> operations = new ArrayDeque<>();
+        VplsData vplsData = VplsData.of(VPLS1);
+        vplsData.addInterfaces(ImmutableSet.of(V100H1));
+        VplsOperation vplsOperation = VplsOperation.of(vplsData,
+                                                       VplsOperation.Operation.UPDATE);
+        operations.add(vplsOperation);
+        vplsData = VplsData.of(VPLS1, EncapsulationType.VLAN);
+        vplsData.addInterfaces(ImmutableSet.of(V100H1, V100H2));
+        vplsOperation = VplsOperation.of(vplsData,
+                                         VplsOperation.Operation.UPDATE);
+        operations.add(vplsOperation);
+        vplsOperation = VplsOperationManager.getOptimizedVplsOperation(operations);
+        assertEquals(VplsOperation.of(vplsData, VplsOperation.Operation.UPDATE), vplsOperation);
+    }
+
+    /**
+     * Test Intent service which always fail when submit or withdraw Intents.
+     */
+    class AlwaysFailureIntentService extends TestIntentService {
+        @Override
+        public void submit(Intent intent) {
+            intents.add(new IntentData(intent, IntentState.FAILED, new WallClockTimestamp()));
+            if (listener != null) {
+                IntentEvent event = IntentEvent.getEvent(IntentState.FAILED, intent).get();
+                listener.event(event);
+            }
+        }
+
+        @Override
+        public void withdraw(Intent intent) {
+            intents.forEach(intentData -> {
+                if (intentData.intent().key().equals(intent.key())) {
+                    intentData.setState(IntentState.FAILED);
+
+                    if (listener != null) {
+                        IntentEvent event = IntentEvent.getEvent(IntentState.FAILED, intent).get();
+                        listener.event(event);
+                    }
+                }
+            });
+        }
+    }
+
+    /**
+     * Test host service without any hosts.
+     */
+    class EmptyHostService extends HostServiceAdapter {
+        @Override
+        public Set<Host> getConnectedHosts(ConnectPoint connectPoint) {
+            return ImmutableSet.of();
+        }
+    }
+
+}
diff --git a/apps/vpls/src/test/java/org/onosproject/vpls/VplsTest.java b/apps/vpls/src/test/java/org/onosproject/vpls/VplsTest.java
index 6dfcea5..716b331 100644
--- a/apps/vpls/src/test/java/org/onosproject/vpls/VplsTest.java
+++ b/apps/vpls/src/test/java/org/onosproject/vpls/VplsTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2016-present Open Networking Laboratory
+ * Copyright 2017-present Open Networking Laboratory
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -13,704 +13,213 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+
 package org.onosproject.vpls;
 
-import com.google.common.collect.HashMultimap;
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.ObjectMapper;
 import com.google.common.collect.ImmutableSet;
-import com.google.common.collect.ImmutableSetMultimap;
 import com.google.common.collect.Lists;
 import com.google.common.collect.Maps;
-import com.google.common.collect.SetMultimap;
 import com.google.common.collect.Sets;
-import org.junit.After;
-import org.junit.Before;
-import org.junit.Test;
 import org.onlab.packet.Ip4Address;
+import org.onlab.packet.IpAddress;
 import org.onlab.packet.MacAddress;
 import org.onlab.packet.VlanId;
 import org.onosproject.TestApplicationId;
-import org.onosproject.app.ApplicationService;
+import org.onosproject.cluster.LeadershipEvent;
+import org.onosproject.cluster.LeadershipEventListener;
+import org.onosproject.cluster.LeadershipServiceAdapter;
+import org.onosproject.cluster.NodeId;
 import org.onosproject.core.ApplicationId;
-import org.onosproject.core.CoreService;
+import org.onosproject.core.CoreServiceAdapter;
 import org.onosproject.core.IdGenerator;
 import org.onosproject.incubator.net.intf.Interface;
 import org.onosproject.incubator.net.intf.InterfaceListener;
 import org.onosproject.incubator.net.intf.InterfaceService;
-import org.onosproject.intentsync.IntentSynchronizationService;
 import org.onosproject.net.ConnectPoint;
 import org.onosproject.net.DefaultHost;
 import org.onosproject.net.DeviceId;
 import org.onosproject.net.EncapsulationType;
-import org.onosproject.net.FilteredConnectPoint;
 import org.onosproject.net.Host;
 import org.onosproject.net.HostId;
 import org.onosproject.net.HostLocation;
 import org.onosproject.net.PortNumber;
-import org.onosproject.net.config.NetworkConfigService;
-import org.onosproject.net.flow.DefaultTrafficSelector;
-import org.onosproject.net.flow.TrafficSelector;
-import org.onosproject.net.flow.criteria.Criterion;
-import org.onosproject.net.flow.criteria.VlanIdCriterion;
+import org.onosproject.net.config.Config;
+import org.onosproject.net.config.ConfigApplyDelegate;
+import org.onosproject.net.config.NetworkConfigEvent;
+import org.onosproject.net.config.NetworkConfigListener;
+import org.onosproject.net.config.NetworkConfigServiceAdapter;
 import org.onosproject.net.host.HostEvent;
 import org.onosproject.net.host.HostListener;
-import org.onosproject.net.host.HostService;
 import org.onosproject.net.host.HostServiceAdapter;
 import org.onosproject.net.intent.Intent;
-import org.onosproject.net.intent.IntentService;
+import org.onosproject.net.intent.IntentData;
+import org.onosproject.net.intent.IntentEvent;
+import org.onosproject.net.intent.IntentListener;
 import org.onosproject.net.intent.IntentServiceAdapter;
-import org.onosproject.net.intent.IntentUtils;
-import org.onosproject.net.intent.Key;
-import org.onosproject.net.intent.MultiPointToSinglePointIntent;
-import org.onosproject.net.intent.SinglePointToMultiPointIntent;
+import org.onosproject.net.intent.IntentState;
 import org.onosproject.net.provider.ProviderId;
-import org.onosproject.vpls.config.VplsConfigService;
+import org.onosproject.store.StoreDelegate;
+import org.onosproject.store.service.WallClockTimestamp;
+import org.onosproject.vpls.api.Vpls;
+import org.onosproject.vpls.api.VplsData;
+import org.onosproject.vpls.config.VplsAppConfig;
+import org.onosproject.vpls.config.VplsAppConfigTest;
+import org.onosproject.vpls.config.VplsConfig;
+import org.onosproject.vpls.store.VplsStoreAdapter;
+import org.onosproject.vpls.store.VplsStoreEvent;
 
+import java.io.IOException;
 import java.util.Collection;
 import java.util.Collections;
-import java.util.HashMap;
-import java.util.HashSet;
 import java.util.List;
 import java.util.Map;
 import java.util.Set;
 import java.util.concurrent.atomic.AtomicLong;
 import java.util.stream.Collectors;
 
-import static java.lang.String.format;
-import static org.easymock.EasyMock.anyObject;
-import static org.easymock.EasyMock.createMock;
-import static org.easymock.EasyMock.expect;
-import static org.easymock.EasyMock.expectLastCall;
-import static org.easymock.EasyMock.replay;
-import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertTrue;
-import static org.onosproject.net.EncapsulationType.NONE;
-import static org.onosproject.net.EncapsulationType.VLAN;
-import static org.onosproject.net.EncapsulationType.valueOf;
-import static org.onosproject.vpls.IntentInstaller.PARTIAL_FAILURE_CONSTRAINT;
-import static org.onosproject.vpls.IntentInstaller.PREFIX_BROADCAST;
-import static org.onosproject.vpls.IntentInstaller.PREFIX_UNICAST;
-import static org.onosproject.vpls.IntentInstaller.setEncap;
-
 /**
- * Tests for the {@link Vpls} class.
+ * Class provides data for VPLS testing.
  */
-public class VplsTest {
-    private static final String APP_NAME = "org.onosproject.vpls";
-    private static final ApplicationId APPID = TestApplicationId.create(APP_NAME);
-    private static final String DASH = "-";
-    private static final int PRIORITY_OFFSET = 1000;
-    private static final String VPLS1 = "vpls1";
-    private static final String VPLS2 = "vpls2";
-    private static final String VPLS3 = "vpls3";
-    private static final String VPLS4 = "vpls4";
+public abstract class VplsTest {
+    protected static final String APP_NAME = "org.onosproject.vpls";
+    protected static final ApplicationId APPID = TestApplicationId.create(APP_NAME);
+    protected static final String DASH = "-";
+    protected static final int PRIORITY_OFFSET = 1000;
+    protected static final String VPLS1 = "vpls1";
+    protected static final String VPLS2 = "vpls2";
+    protected static final String VPLS3 = "vpls3";
+    protected static final String VPLS4 = "vpls4";
 
-    private static final PortNumber P1 = PortNumber.portNumber(1);
-    private static final PortNumber P2 = PortNumber.portNumber(2);
+    protected static final PortNumber P1 = PortNumber.portNumber(1);
+    protected static final PortNumber P2 = PortNumber.portNumber(2);
 
-    private static final DeviceId DID1 = getDeviceId(1);
-    private static final DeviceId DID2 = getDeviceId(2);
-    private static final DeviceId DID3 = getDeviceId(3);
-    private static final DeviceId DID4 = getDeviceId(4);
-    private static final DeviceId DID5 = getDeviceId(5);
-    private static final DeviceId DID6 = getDeviceId(6);
+    protected static final DeviceId DID1 = getDeviceId(1);
+    protected static final DeviceId DID2 = getDeviceId(2);
+    protected static final DeviceId DID3 = getDeviceId(3);
+    protected static final DeviceId DID4 = getDeviceId(4);
+    protected static final DeviceId DID5 = getDeviceId(5);
+    protected static final DeviceId DID6 = getDeviceId(6);
 
-    private static final ConnectPoint CP1 = new ConnectPoint(DID1, P1);
-    private static final ConnectPoint CP2 = new ConnectPoint(DID2, P1);
-    private static final ConnectPoint CP3 = new ConnectPoint(DID3, P1);
-    private static final ConnectPoint CP4 = new ConnectPoint(DID4, P1);
-    private static final ConnectPoint CP5 = new ConnectPoint(DID5, P1);
-    private static final ConnectPoint CP6 = new ConnectPoint(DID6, P1);
-    private static final ConnectPoint CP7 = new ConnectPoint(DID4, P2);
-    private static final ConnectPoint CP8 = new ConnectPoint(DID3, P2);
-    private static final ConnectPoint CP9 = new ConnectPoint(DID5, P1);
-    private static final ConnectPoint CP10 = new ConnectPoint(DID5, P2);
+    protected static final ConnectPoint CP1 = new ConnectPoint(DID1, P1);
+    protected static final ConnectPoint CP2 = new ConnectPoint(DID2, P1);
+    protected static final ConnectPoint CP3 = new ConnectPoint(DID3, P1);
+    protected static final ConnectPoint CP4 = new ConnectPoint(DID4, P1);
+    protected static final ConnectPoint CP5 = new ConnectPoint(DID5, P1);
+    protected static final ConnectPoint CP6 = new ConnectPoint(DID6, P1);
+    protected static final ConnectPoint CP7 = new ConnectPoint(DID4, P2);
+    protected static final ConnectPoint CP8 = new ConnectPoint(DID3, P2);
+    protected static final ConnectPoint CP9 = new ConnectPoint(DID5, P1);
+    protected static final ConnectPoint CP10 = new ConnectPoint(DID5, P2);
 
-    private static final VlanId VLAN100 = VlanId.vlanId((short) 100);
-    private static final VlanId VLAN200 = VlanId.vlanId((short) 200);
-    private static final VlanId VLAN300 = VlanId.vlanId((short) 300);
-    private static final VlanId VLAN400 = VlanId.vlanId((short) 400);
-    private static final VlanId VLAN_NONE = VlanId.NONE;
+    protected static final VlanId VLAN100 = VlanId.vlanId((short) 100);
+    protected static final VlanId VLAN200 = VlanId.vlanId((short) 200);
+    protected static final VlanId VLAN300 = VlanId.vlanId((short) 300);
+    protected static final VlanId VLAN400 = VlanId.vlanId((short) 400);
+    protected static final VlanId VLAN_NONE = VlanId.NONE;
 
-    private static final MacAddress MAC1 = getMac(1);
-    private static final MacAddress MAC2 = getMac(2);
-    private static final MacAddress MAC3 = getMac(3);
-    private static final MacAddress MAC4 = getMac(4);
-    private static final MacAddress MAC5 = getMac(5);
-    private static final MacAddress MAC6 = getMac(6);
-    private static final MacAddress MAC7 = getMac(7);
-    private static final MacAddress MAC8 = getMac(8);
-    private static final MacAddress MAC9 = getMac(9);
-    private static final MacAddress MAC10 = getMac(10);
-    private static final MacAddress MAC11 = getMac(11);
+    protected static final MacAddress MAC1 = getMac(1);
+    protected static final MacAddress MAC2 = getMac(2);
+    protected static final MacAddress MAC3 = getMac(3);
+    protected static final MacAddress MAC4 = getMac(4);
+    protected static final MacAddress MAC5 = getMac(5);
+    protected static final MacAddress MAC6 = getMac(6);
+    protected static final MacAddress MAC7 = getMac(7);
+    protected static final MacAddress MAC8 = getMac(8);
+    protected static final MacAddress MAC9 = getMac(9);
+    protected static final MacAddress MAC10 = getMac(10);
+    protected static final MacAddress MAC11 = getMac(11);
 
-    private static final Ip4Address IP1 = Ip4Address.valueOf("192.168.1.1");
-    private static final Ip4Address IP2 = Ip4Address.valueOf("192.168.1.2");
+    protected static final Ip4Address IP1 = Ip4Address.valueOf("192.168.1.1");
+    protected static final Ip4Address IP2 = Ip4Address.valueOf("192.168.1.2");
 
-    private static final HostId HID1 = HostId.hostId(MAC1, VLAN100);
-    private static final HostId HID2 = HostId.hostId(MAC2, VLAN100);
-    private static final HostId HID3 = HostId.hostId(MAC3, VLAN200);
-    private static final HostId HID4 = HostId.hostId(MAC4, VLAN200);
-    private static final HostId HID5 = HostId.hostId(MAC5, VLAN300);
-    private static final HostId HID6 = HostId.hostId(MAC6, VLAN300);
-    private static final HostId HID7 = HostId.hostId(MAC7, VLAN300);
-    private static final HostId HID8 = HostId.hostId(MAC8, VLAN400);
-    private static final HostId HID9 = HostId.hostId(MAC9);
-    private static final HostId HID10 = HostId.hostId(MAC10);
-    private static final HostId HID11 = HostId.hostId(MAC11);
+    protected static final HostId HID1 = HostId.hostId(MAC1, VLAN100);
+    protected static final HostId HID2 = HostId.hostId(MAC2, VLAN100);
+    protected static final HostId HID3 = HostId.hostId(MAC3, VLAN200);
+    protected static final HostId HID4 = HostId.hostId(MAC4, VLAN200);
+    protected static final HostId HID5 = HostId.hostId(MAC5, VLAN300);
+    protected static final HostId HID6 = HostId.hostId(MAC6, VLAN300);
+    protected static final HostId HID7 = HostId.hostId(MAC7, VLAN300);
+    protected static final HostId HID8 = HostId.hostId(MAC8, VLAN400);
+    protected static final HostId HID9 = HostId.hostId(MAC9);
+    protected static final HostId HID10 = HostId.hostId(MAC10);
+    protected static final HostId HID11 = HostId.hostId(MAC11);
 
-    private static final ProviderId PID = new ProviderId("of", "foo");
+    protected static final ProviderId PID = new ProviderId("of", "foo");
 
-    private static IdGenerator idGenerator;
+    protected static final NodeId NODE_ID_1 = new NodeId("Node1");
+    protected static final NodeId NODE_ID_2 = new NodeId("Node2");
 
-    private static final Interface V100H1 =
+    protected static IdGenerator idGenerator;
+
+    protected static final Interface V100H1 =
             new Interface("v100h1", CP1, null, null, VLAN100);
-    private static final Interface V100H2 =
+    protected static final Interface V100H2 =
             new Interface("v100h2", CP2, null, null, VLAN100);
-    private static final Interface V200H1 =
+    protected static final Interface V200H1 =
             new Interface("v200h1", CP3, null, null, VLAN200);
-    private static final Interface V200H2 =
+    protected static final Interface V200H2 =
             new Interface("v200h2", CP4, null, null, VLAN200);
-    private static final Interface V300H1 =
+    protected static final Interface V300H1 =
             new Interface("v300h1", CP5, null, null, VLAN300);
-    private static final Interface V300H2 =
+    protected static final Interface V300H2 =
             new Interface("v300h2", CP6, null, null, VLAN300);
-    private static final Interface V400H1 =
+    protected static final Interface V400H1 =
             new Interface("v400h1", CP7, null, null, VLAN400);
 
-    private static final Interface VNONEH1 =
+    protected static final Interface VNONEH1 =
             new Interface("vNoneh1", CP8, null, null, VLAN_NONE);
-    private static final Interface VNONEH2 =
+    protected static final Interface VNONEH2 =
             new Interface("vNoneh2", CP9, null, null, VLAN_NONE);
-    private static final Interface VNONEH3 =
+    protected static final Interface VNONEH3 =
             new Interface("vNoneh3", CP10, null, null, VLAN_NONE);
 
-    private static final Host V100HOST1 =
+    protected static final Host V100HOST1 =
             new DefaultHost(PID, HID1, MAC1, VLAN100,
                             getLocation(1), Collections.singleton(IP1));
-    private static final Host V100HOST2 =
+    protected static final Host V100HOST2 =
             new DefaultHost(PID, HID2, MAC2, VLAN100,
                             getLocation(2), Sets.newHashSet());
-    private static final Host V200HOST1 =
+    protected static final Host V200HOST1 =
             new DefaultHost(PID, HID3, MAC3, VLAN200,
                             getLocation(3), Collections.singleton(IP2));
-    private static final Host V200HOST2 =
+    protected static final Host V200HOST2 =
             new DefaultHost(PID, HID4, MAC4, VLAN200,
                             getLocation(4), Sets.newHashSet());
-    private static final Host V300HOST1 =
+    protected static final Host V300HOST1 =
             new DefaultHost(PID, HID5, MAC5, VLAN300,
                             getLocation(5), Sets.newHashSet());
-    private static final Host V300HOST2 =
+    protected static final Host V300HOST2 =
             new DefaultHost(PID, HID6, MAC6, VLAN300,
                             getLocation(6), Sets.newHashSet());
-    private static final Host V300HOST3 =
+    protected static final Host V300HOST3 =
             new DefaultHost(PID, HID7, MAC7, VLAN300,
                             getLocation(7), Sets.newHashSet());
-    private static final Host V400HOST1 =
+    protected static final Host V400HOST1 =
             new DefaultHost(PID, HID8, MAC8, VLAN400,
                             getLocation(4, 2), Sets.newHashSet());
 
-    private static final Host VNONEHOST1 =
+    protected static final Host VNONEHOST1 =
             new DefaultHost(PID, HID9, MAC9, VlanId.NONE,
                             getLocation(3, 2), Sets.newHashSet());
-    private static final Host VNONEHOST2 =
+    protected static final Host VNONEHOST2 =
             new DefaultHost(PID, HID10, MAC10, VlanId.NONE,
                             getLocation(5, 1), Sets.newHashSet());
-    private static final Host VNONEHOST3 =
+    protected static final Host VNONEHOST3 =
             new DefaultHost(PID, HID11, MAC11, VlanId.NONE,
                             getLocation(5, 2), Sets.newHashSet());
 
-    private static final Set<Interface> AVAILABLE_INTERFACES =
+    protected static final Set<Interface> AVAILABLE_INTERFACES =
             ImmutableSet.of(V100H1, V100H2, V200H1, V200H2, V300H1, V300H2,
-                            V400H1, VNONEH1, VNONEH2);
+                            V400H1, VNONEH1, VNONEH2, VNONEH3);
 
-    private static final Set<Host> AVAILABLE_HOSTS =
+    protected static final Set<Host> AVAILABLE_HOSTS =
             ImmutableSet.of(V100HOST1, V100HOST2, V200HOST1,
                             V200HOST2, V300HOST1, V300HOST2, V300HOST3,
                             VNONEHOST1, VNONEHOST2,
                             V400HOST1, VNONEHOST3);
 
-    private SetMultimap<String, Interface> interfacesByVpls = HashMultimap.create();
-
-    private ApplicationService applicationService;
-    private CoreService coreService;
-    private HostListener hostListener;
-    private NetworkConfigService configService;
-    private Set<Host> hostsAvailable;
-    private HostService hostService;
-    private IntentService intentService;
-    private InterfaceService interfaceService;
-    private VplsConfigService vplsConfigService;
-    private Vpls vpls;
-
-    @Before
-    public void setUp() throws Exception {
-        idGenerator = new TestIdGenerator();
-        Intent.unbindIdGenerator(idGenerator);
-        Intent.bindIdGenerator(idGenerator);
-
-        applicationService = createMock(ApplicationService.class);
-
-        configService = createMock(NetworkConfigService.class);
-
-        coreService = createMock(CoreService.class);
-        expect(coreService.registerApplication(APP_NAME))
-                .andReturn(APPID);
-        replay(coreService);
-
-        hostsAvailable = Sets.newHashSet();
-        hostService = new TestHostService(hostsAvailable);
-
-        intentService = new TestIntentService();
-
-        TestIntentSynchronizer intentSynchronizer =
-                new TestIntentSynchronizer(intentService);
-
-        interfaceService = createMock(InterfaceService.class);
-        interfaceService.addListener(anyObject(InterfaceListener.class));
-        expectLastCall().anyTimes();
-        addIfaceConfig();
-
-        interfacesByVpls.put(VPLS1, V100H1);
-        interfacesByVpls.put(VPLS1, V200H1);
-        interfacesByVpls.put(VPLS1, V300H1);
-        interfacesByVpls.put(VPLS2, V100H2);
-        interfacesByVpls.put(VPLS2, V200H2);
-        interfacesByVpls.put(VPLS2, V300H2);
-        interfacesByVpls.put(VPLS3, VNONEH1);
-        interfacesByVpls.put(VPLS3, VNONEH2);
-        interfacesByVpls.put(VPLS4, V400H1);
-        interfacesByVpls.put(VPLS4, VNONEH3);
-
-        Map<String, EncapsulationType> encapByVpls = new HashMap<>();
-        encapByVpls.put(VPLS1, VLAN);
-        encapByVpls.put(VPLS2, NONE);
-        encapByVpls.put(VPLS3, NONE);
-        encapByVpls.put(VPLS4, NONE);
-
-        vplsConfigService = new TestVplsConfigService(interfacesByVpls, encapByVpls);
-
-        vpls = new Vpls();
-        vpls.applicationService = applicationService;
-        vpls.coreService = coreService;
-        vpls.hostService = hostService;
-        vpls.vplsConfigService = vplsConfigService;
-        vpls.intentService = intentService;
-        vpls.interfaceService = interfaceService;
-        vpls.configService = configService;
-        vpls.intentSynchronizer = intentSynchronizer;
-
-    }
-
-    @After
-    public void tearDown() {
-        Intent.unbindIdGenerator(idGenerator);
-    }
-
-    /**
-     * Creates the interface configuration:
-     *  On devices 1 and 2 is configured an interface on port 1 with vlan 100.
-     *  On device 3 is configured an interface on port 3 with no vlan.
-     *  On devices 3 and 4 is configured an interface on port 1 with vlan 200.
-     *  On device 4 is an interface configured on port 2 with vlan 400.
-     *  On device 5 are configured two interfaces on port 1 and 2 with no vlan.
-     *  On device 5 and 6 is configured an interface on port 1 with vlan 300.
-     */
-    private void addIfaceConfig() {
-        Set<Interface> interfaces = ImmutableSet.copyOf(AVAILABLE_INTERFACES);
-        Set<Interface> vlanOneSet = ImmutableSet.of(V100H1, V100H2);
-        Set<Interface> vlanTwoSet = ImmutableSet.of(V200H1, V200H2);
-        Set<Interface> vlanThreeSet = ImmutableSet.of(VNONEH1, VNONEH2);
-        Set<Interface> vlanFourSet = ImmutableSet.of(V400H1, VNONEH3);
-
-        AVAILABLE_INTERFACES.forEach(intf -> {
-            expect(interfaceService.getInterfacesByPort(intf.connectPoint()))
-                    .andReturn(Sets.newHashSet(intf)).anyTimes();
-        });
-        expect(interfaceService.getInterfacesByVlan(VLAN100))
-                .andReturn(vlanOneSet).anyTimes();
-        expect(interfaceService.getInterfacesByVlan(VLAN200))
-                .andReturn(vlanTwoSet).anyTimes();
-        expect(interfaceService.getInterfacesByVlan(VLAN300))
-                .andReturn(vlanThreeSet).anyTimes();
-        expect(interfaceService.getInterfacesByVlan(VLAN400))
-                .andReturn(vlanFourSet).anyTimes();
-        expect(interfaceService.getInterfacesByVlan(VlanId.NONE))
-                .andReturn(vlanFourSet).anyTimes();
-        expect(interfaceService.getInterfaces()).andReturn(interfaces).anyTimes();
-
-        replay(interfaceService);
-    }
-
-    /**
-     * Seven ports are configured with VLANs, while three ports are not. No hosts are
-     * registered by the HostService.
-     *
-     * The first three ports have an interface configured on VPLS 1,
-     * the other three on VPLS 2. Two ports are defined for VPLS 3, while
-     * the two remaining ports are configured on VPLS 4.
-     *
-     * The number of intents expected is 10: three for VPLS 1, three for VPLS 2,
-     * two for VPLS 3, two for VPLS 4. Eight MP2SP intents.
-     * Checks if the number of intents submitted to the intent framework is
-     * equal to the number of intents expected and if all intents are equivalent.
-     */
-    @Test
-    public void activateNoHosts() {
-        vpls.activate();
-
-        List<Intent> expectedIntents = Lists.newArrayList();
-        Set<FilteredConnectPoint> fcPoints;
-
-        fcPoints = buildFCPoints(ImmutableSet.of(V100H1, V200H1, V300H1));
-        expectedIntents.addAll(generateVplsBrc(fcPoints, VPLS1, VLAN));
-
-        fcPoints = buildFCPoints(ImmutableSet.of(V100H2, V200H2, V300H2));
-        expectedIntents.addAll(generateVplsBrc(fcPoints, VPLS2, NONE));
-
-        fcPoints = buildFCPoints(ImmutableSet.of(VNONEH1, VNONEH2));
-        expectedIntents.addAll(generateVplsBrc(fcPoints, VPLS3, NONE));
-
-        fcPoints = buildFCPoints(ImmutableSet.of(V400H1, VNONEH3));
-        expectedIntents.addAll(generateVplsBrc(fcPoints, VPLS4, NONE));
-
-        checkIntents(expectedIntents);
-    }
-
-    /**
-     * Ten ports are configured with VLANs and ten hosts are registered by the
-     * HostService.
-     *
-     * The first three ports have an interface configured on VPLS 1,
-     * the other three on VPLS 2, two on VPLS3 and two on VPLS4.
-     *
-     * The number of intents expected is twenty: six
-     * for VPLS 1, six for VPLS 2. four for VPLS 3, four for VPLS 4.
-     * That is ten sp2mp intents, ten mp2sp intents. For VPLS 1
-     * IPs are added to demonstrate this doesn't influence the number of intents
-     * created. Checks if the number of intents submitted to the intent
-     * framework is equal to the number of intents expected and if all intents
-     * are equivalent.
-     */
-    @Test
-    public void tenInterfacesConfiguredHostsPresent() {
-        hostsAvailable.addAll(AVAILABLE_HOSTS);
-
-        vpls.activate();
-
-        List<Intent> expectedIntents = Lists.newArrayList();
-        Set<FilteredConnectPoint> fcPoints;
-        Set<Host> hosts;
-
-        fcPoints = buildFCPoints(ImmutableSet.of(V100H1, V200H1, V300H1));
-        hosts = ImmutableSet.of(V100HOST1, V200HOST1, V300HOST1);
-        expectedIntents.addAll(generateVplsBrc(fcPoints, VPLS1, VLAN));
-        expectedIntents.addAll(generateVplsUni(fcPoints, hosts, VPLS1, VLAN));
-
-        fcPoints = buildFCPoints(ImmutableSet.of(V100H2, V200H2, V300H2));
-        hosts = ImmutableSet.of(V100HOST2, V200HOST2, V300HOST2);
-        expectedIntents.addAll(generateVplsBrc(fcPoints, VPLS2, NONE));
-        expectedIntents.addAll(generateVplsUni(fcPoints, hosts, VPLS2, NONE));
-
-        fcPoints = buildFCPoints(ImmutableSet.of(VNONEH1, VNONEH2));
-        hosts = ImmutableSet.of(VNONEHOST1, VNONEHOST2);
-        expectedIntents.addAll(generateVplsBrc(fcPoints, VPLS3, NONE));
-        expectedIntents.addAll(generateVplsUni(fcPoints, hosts, VPLS3, NONE));
-
-        fcPoints = buildFCPoints(ImmutableSet.of(V400H1, VNONEH3));
-        hosts = ImmutableSet.of(V400HOST1, VNONEHOST3);
-        expectedIntents.addAll(generateVplsBrc(fcPoints, VPLS4, NONE));
-        expectedIntents.addAll(generateVplsUni(fcPoints, hosts, VPLS4, NONE));
-
-        checkIntents(expectedIntents);
-    }
-
-    /**
-     * Ten ports are configured; seven have VLANs and three do not.
-     * Initially, no hosts are registered by the HostService.
-     *
-     * The first three ports have an interface configured on
-     * VPLS 1, three have an interface configured on VPLS 2, two have an
-     * interface configured on VPLS 3 and two have an interface configured
-     * on VPLS 4, three have an interface configure. When the
-     * module starts up, three hosts attached to device one, two and three -
-     * port 1, are registered by the HostService and events are sent to the
-     * application. sp2mp intents are created for all interfaces configured and
-     * mp2sp intents are created only for the hosts attached.
-     *
-     * The number of intents expected is seventeen: six for VPLS 1,
-     * three for VPLS 2, four for VPLS3 and four for VPLS4.
-     * Ten sp2mp intents, seven mp2sp intents. IPs are added on the first two
-     * hosts only to demonstrate this doesn't influence the number of intents
-     * created.
-     * An additional host is added on device seven - port 1, to demonstrate that
-     * the application does not generate intents, even if the interface uses the
-     * same VLAN Id of the other interfaces configured for the specifc VPLS.
-     * Checks if the number of intents submitted to the intent framework is equal
-     * to the number of intents expected and if all intents are equivalent.
-     */
-    @Test
-    public void tenInterfacesThreeHostEventsSameVpls() {
-        vpls.activate();
-
-        List<Intent> expectedIntents = Lists.newArrayList();
-        Set<FilteredConnectPoint> fcPoints;
-        Set<Host> hosts;
-
-        hostsAvailable.addAll(Sets.newHashSet(V100HOST1, V200HOST1,
-                                              V300HOST1, V300HOST3,
-                                              VNONEHOST1, VNONEHOST2,
-                                              V400HOST1, VNONEHOST3));
-        hostsAvailable.forEach(host ->
-                                       hostListener.event(new HostEvent(HostEvent.Type.HOST_ADDED, host)));
-
-        fcPoints = buildFCPoints(ImmutableSet.of(V100H1, V200H1, V300H1));
-        hosts = ImmutableSet.of(V100HOST1, V200HOST1, V300HOST1);
-        expectedIntents.addAll(generateVplsBrc(fcPoints, VPLS1, VLAN));
-        expectedIntents.addAll(generateVplsUni(fcPoints, hosts, VPLS1, VLAN));
-
-        fcPoints = buildFCPoints(ImmutableSet.of(V100H2, V200H2, V300H2));
-        expectedIntents.addAll(generateVplsBrc(fcPoints, VPLS2, NONE));
-
-        fcPoints = buildFCPoints(ImmutableSet.of(VNONEH1, VNONEH2));
-        hosts = ImmutableSet.of(VNONEHOST1, VNONEHOST2);
-        expectedIntents.addAll(generateVplsBrc(fcPoints, VPLS3, NONE));
-        expectedIntents.addAll(generateVplsUni(fcPoints, hosts, VPLS3, NONE));
-
-        fcPoints = buildFCPoints(ImmutableSet.of(V400H1, VNONEH3));
-        hosts = ImmutableSet.of(V400HOST1, VNONEHOST3);
-        expectedIntents.addAll(generateVplsBrc(fcPoints, VPLS4, NONE));
-        expectedIntents.addAll(generateVplsUni(fcPoints, hosts, VPLS4, NONE));
-
-        checkIntents(expectedIntents);
-    }
-
-    /**
-     * Generates a list of the expected sp2mp intents for a VPLS.
-     *
-     * @param fcPoints the filtered connect point
-     * @param name the name of the VPLS
-     * @param encap the encapsulation type
-     * @return the list of expected sp2mp intents for the given VPLS
-     */
-    private List<SinglePointToMultiPointIntent>
-    generateVplsBrc(Set<FilteredConnectPoint> fcPoints, String name, EncapsulationType encap) {
-        List<SinglePointToMultiPointIntent> intents = Lists.newArrayList();
-
-        fcPoints.forEach(point -> {
-            Set<FilteredConnectPoint> otherPoints =
-                    fcPoints.stream()
-                            .filter(fcp -> !fcp.equals(point))
-                            .collect(Collectors.toSet());
-
-            Key brckey = buildKey(PREFIX_BROADCAST,
-                                  point.connectPoint(),
-                                  name,
-                                  MacAddress.BROADCAST);
-
-            intents.add(buildBrcIntent(brckey, point, otherPoints, encap));
-        });
-
-        return intents;
-    }
-
-    /**
-     * Generates a list of expected mp2sp intents for a given VPLS.
-     *
-     * @param fcPoints the filtered connect point
-     * @param hosts the hosts
-     * @param name the name of the VPLS
-     * @param encap the encapsulation type
-     * @return the list of expected mp2sp intents for the given VPLS
-     */
-    private List<MultiPointToSinglePointIntent>
-    generateVplsUni(Set<FilteredConnectPoint> fcPoints, Set<Host> hosts,
-                    String name, EncapsulationType encap) {
-        List<MultiPointToSinglePointIntent> intents = Lists.newArrayList();
-
-        hosts.forEach(host -> {
-            FilteredConnectPoint hostPoint = getHostPoint(host, fcPoints);
-
-            Set<FilteredConnectPoint> otherPoints =
-                    fcPoints.stream()
-                            .filter(fcp -> !fcp.equals(hostPoint))
-                            .collect(Collectors.toSet());
-
-            Key uniKey = buildKey(PREFIX_UNICAST,
-                                  host.location(), name, host.mac());
-
-            intents.add(buildUniIntent(uniKey, otherPoints, hostPoint, host, encap));
-        });
-
-        return intents;
-    }
-
-    /**
-     * Checks if the number of intents submitted to the intent framework is equal
-     * to the number of intents expected and if all intents are equivalent.
-     *
-     * @param intents the list of intents expected
-     */
-    private void checkIntents(List<Intent> intents) {
-        assertEquals("The number of intents submitted differs from the number" +
-                             " of intents expected. ",
-                     intents.size(), intentService.getIntentCount());
-
-        for (Intent intentOne : intents) {
-            boolean found = false;
-            for (Intent intentTwo : intentService.getIntents()) {
-                if (intentOne.key().equals(intentTwo.key())) {
-                    found = true;
-                    assertTrue(format("The intent submitted is different from" +
-                                              " the intent expected. %s %s",
-                                      intentOne, intentTwo),
-                               IntentUtils.intentsAreEqual(intentOne, intentTwo));
-                    break;
-                }
-            }
-            assertTrue("The intent submitted is not equal to any of the expected" +
-                               " intents. ", found);
-        }
-    }
-
-    /**
-     * Builds a broadcast intent.
-     *
-     * @param key the key to identify the intent
-     * @param src the ingress connect point
-     * @param dsts the egress connect points
-     * @return the generated single-point to multi-point intent
-     */
-    private SinglePointToMultiPointIntent buildBrcIntent(Key key,
-                                                         FilteredConnectPoint src,
-                                                         Set<FilteredConnectPoint> dsts,
-                                                         EncapsulationType encap) {
-        SinglePointToMultiPointIntent.Builder intentBuilder;
-
-        TrafficSelector selector = DefaultTrafficSelector.builder()
-                .matchEthDst(MacAddress.BROADCAST)
-                .build();
-
-        intentBuilder = SinglePointToMultiPointIntent.builder()
-                .appId(APPID)
-                .key(key)
-                .selector(selector)
-                .filteredIngressPoint(src)
-                .filteredEgressPoints(dsts)
-                .constraints(PARTIAL_FAILURE_CONSTRAINT)
-                .priority(PRIORITY_OFFSET);
-
-        setEncap(intentBuilder, PARTIAL_FAILURE_CONSTRAINT, encap);
-
-        return intentBuilder.build();
-    }
-
-    /**
-     * Builds a unicast intent.
-     *
-     * @param key the key to identify the intent
-     * @param srcs the ingress connect points
-     * @param dst the egress connect point
-     * @param host the destination Host
-     * @return the generated multi-point to single-point intent
-     */
-    private MultiPointToSinglePointIntent buildUniIntent(Key key,
-                                                         Set<FilteredConnectPoint> srcs,
-                                                         FilteredConnectPoint dst,
-                                                         Host host,
-                                                         EncapsulationType encap) {
-        MultiPointToSinglePointIntent.Builder intentBuilder;
-
-        TrafficSelector selector = DefaultTrafficSelector.builder()
-                .matchEthDst(host.mac())
-                .build();
-
-        intentBuilder = MultiPointToSinglePointIntent.builder()
-                .appId(APPID)
-                .key(key)
-                .selector(selector)
-                .filteredIngressPoints(srcs)
-                .filteredEgressPoint(dst)
-                .constraints(PARTIAL_FAILURE_CONSTRAINT)
-                .priority(PRIORITY_OFFSET);
-
-        setEncap(intentBuilder, PARTIAL_FAILURE_CONSTRAINT, encap);
-
-        return intentBuilder.build();
-    }
-
-    /**
-     * Returns the filtered connect point associated to a given host.
-     *
-     * @param host the target host
-     * @param fcps the filtered connected points
-     * @return the filtered connect point associated to the given host; null
-     * otherwise
-     */
-    private FilteredConnectPoint getHostPoint(Host host,
-                                              Set<FilteredConnectPoint> fcps) {
-        return fcps.stream()
-                .filter(fcp -> fcp.connectPoint().equals(host.location()))
-                .filter(fcp -> {
-                    VlanIdCriterion vlanCriterion =
-                            (VlanIdCriterion) fcp.trafficSelector().
-                                    getCriterion(Criterion.Type.VLAN_VID);
-                    return vlanCriterion == null ||
-                            vlanCriterion.vlanId().equals(host.vlan());
-                })
-                .findFirst()
-                .orElse(null);
-    }
-
-    /**
-     * Computes a set of filtered connect points from a list of given interfaces.
-     *
-     * @param interfaces the interfaces to compute
-     * @return the set of filtered connect points
-     */
-    private Set<FilteredConnectPoint> buildFCPoints(Collection<Interface> interfaces) {
-        // Build all filtered connected points in the VPLS
-        return interfaces
-                .stream()
-                .map(intf -> {
-                    TrafficSelector.Builder selectorBuilder =
-                            DefaultTrafficSelector.builder();
-                    if (!intf.vlan().equals(VlanId.NONE)) {
-                        selectorBuilder.matchVlanId(intf.vlan());
-                    }
-                    return new FilteredConnectPoint(intf.connectPoint(),
-                                                    selectorBuilder.build());
-                })
-                .collect(Collectors.toSet());
-    }
-
-    /**
-     * Builds an intent Key either for a single-point to multi-point or
-     * multi-point to single-point intent, based on a prefix that defines
-     * the intent type, the connection point representing the source or the
-     * destination and the VLAN Id representing the VPLS.
-     *
-     * @param prefix the key prefix
-     * @param cPoint the ingress/egress connect point
-     * @param vplsName the VPLS name
-     * @param hostMac the ingress/egress MAC address
-     * @return the key to identify the intent
-     */
-    private Key buildKey(String prefix,
-                         ConnectPoint cPoint,
-                         String vplsName,
-                         MacAddress hostMac) {
-        String keyString = vplsName +
-                DASH +
-                prefix +
-                DASH +
-                cPoint.deviceId() +
-                DASH +
-                cPoint.port() +
-                DASH +
-                hostMac;
-
-        return Key.of(keyString, APPID);
-    }
 
     /**
      * Returns the device Id of the ith device.
@@ -718,38 +227,91 @@
      * @param i the device to get the Id of
      * @return the device Id
      */
-    private static DeviceId getDeviceId(int i) {
+    protected static DeviceId getDeviceId(int i) {
         return DeviceId.deviceId("" + i);
     }
 
-    private static MacAddress getMac(int n) {
+    /**
+     * Generates a mac address by given number.
+     *
+     * @param n the number to generate mac address
+     * @return the mac address
+     */
+    protected static MacAddress getMac(int n) {
         return MacAddress.valueOf(String.format("00:00:00:00:00:%s", n));
     }
 
-    private static HostLocation getLocation(int i) {
+    /**
+     * Generates a host location by given device number.
+     *
+     * @param i the given number
+     * @return the host location
+     */
+    protected static HostLocation getLocation(int i) {
         return new HostLocation(new ConnectPoint(getDeviceId(i), P1), 123L);
     }
 
-    private static HostLocation getLocation(int d, int p) {
+    /**
+     * Generates host location by given device number and port number.
+     *
+     * @param d the device number
+     * @param p the port number
+     * @return the host location
+     */
+    protected static HostLocation getLocation(int d, int p) {
         return new HostLocation(new ConnectPoint(getDeviceId(d),
                                                  PortNumber.portNumber(p)), 123L);
     }
 
     /**
-     * Represents a fake IntentService class that allows to store and retrieve
-     * intents without implementing the IntentService logic.
+     * Test core service; For generate test application ID.
      */
-    private class TestIntentService extends IntentServiceAdapter {
+    public class TestCoreService extends CoreServiceAdapter {
+        @Override
+        public ApplicationId registerApplication(String name) {
+            return TestApplicationId.create(name);
+        }
+    }
 
-        private Map<Key, Intent> intents;
+    /**
+     * Test intent service.
+     * Always install or withdraw success for any Intents.
+     */
+    public class TestIntentService extends IntentServiceAdapter {
+        IntentListener listener;
+        List<IntentData> intents;
 
         public TestIntentService() {
-            intents = Maps.newHashMap();
+            intents = Lists.newArrayList();
         }
 
         @Override
         public void submit(Intent intent) {
-            intents.put(intent.key(), intent);
+            intents.add(new IntentData(intent, IntentState.INSTALLED, new WallClockTimestamp()));
+            if (listener != null) {
+                IntentEvent.getEvent(IntentState.INSTALLED, intent).ifPresent(listener::event);
+
+            }
+        }
+
+        @Override
+        public void withdraw(Intent intent) {
+            intents.forEach(intentData -> {
+                if (intentData.intent().key().equals(intent.key())) {
+                    intentData.setState(IntentState.WITHDRAWN);
+
+                    if (listener != null) {
+                        IntentEvent.getEvent(IntentState.WITHDRAWN, intent).ifPresent(listener::event);
+                    }
+                }
+            });
+        }
+
+        @Override
+        public Iterable<Intent> getIntents() {
+            return intents.stream()
+                    .map(IntentData::intent)
+                    .collect(Collectors.toList());
         }
 
         @Override
@@ -758,52 +320,227 @@
         }
 
         @Override
-        public Iterable<Intent> getIntents() {
-            return intents.values();
+        public void addListener(IntentListener listener) {
+            this.listener = listener;
         }
 
         @Override
-        public Intent getIntent(Key intentKey) {
-            for (Intent intent : intents.values()) {
-                if (intent.key().equals(intentKey)) {
-                    return intent;
-                }
-            }
-            return null;
+        public void removeListener(IntentListener listener) {
+            this.listener = null;
         }
     }
 
     /**
-     * Represents a fake HostService class which allows to add hosts manually
-     * in each test, when needed.
+     * Test leadership service.
      */
-    private class TestHostService extends HostServiceAdapter {
+    public class TestLeadershipService extends LeadershipServiceAdapter {
+        LeadershipEventListener listener;
 
-        private Set<Host> hosts;
-
-        public TestHostService(Set<Host> hosts) {
-            this.hosts = hosts;
+        @Override
+        public void addListener(LeadershipEventListener listener) {
+            this.listener = listener;
         }
 
         @Override
-        public void addListener(HostListener listener) {
-            VplsTest.this.hostListener = listener;
+        public void removeListener(LeadershipEventListener listener) {
+            this.listener = null;
+        }
+
+        /**
+         * Sends the leadership event to the listener.
+         *
+         * @param event the Intent event
+         */
+        public void sendEvent(LeadershipEvent event) {
+            if (listener != null && listener.isRelevant(event)) {
+                listener.event(event);
+            }
         }
 
         @Override
-        public Set<Host> getConnectedHosts(ConnectPoint connectPoint) {
-            return hosts.stream()
-                    .filter(h -> h.location().equals(connectPoint))
+        public NodeId getLeader(String path) {
+            return NODE_ID_1;
+        }
+    }
+
+    /**
+     * Test interface service; contains all interfaces which already generated.
+     */
+    public class TestInterfaceService implements InterfaceService {
+
+        @Override
+        public void addListener(InterfaceListener listener) {
+        }
+
+        @Override
+        public void removeListener(InterfaceListener listener) {
+        }
+
+        @Override
+        public Set<Interface> getInterfaces() {
+            return AVAILABLE_INTERFACES;
+        }
+
+        @Override
+        public Interface getInterfaceByName(ConnectPoint connectPoint,
+                                            String name) {
+            return AVAILABLE_INTERFACES.stream()
+                    .filter(intf -> intf.name().equals(name))
+                    .findFirst()
+                    .orElse(null);
+        }
+
+        @Override
+        public Set<Interface> getInterfacesByPort(ConnectPoint port) {
+            return AVAILABLE_INTERFACES.stream()
+                    .filter(intf -> intf.connectPoint().equals(port))
                     .collect(Collectors.toSet());
         }
 
+        @Override
+        public Set<Interface> getInterfacesByIp(IpAddress ip) {
+            return AVAILABLE_INTERFACES.stream()
+                    .filter(intf -> intf.ipAddressesList().contains(ip))
+                    .collect(Collectors.toSet());
+        }
+
+        @Override
+        public Set<Interface> getInterfacesByVlan(VlanId vlan) {
+            return AVAILABLE_INTERFACES.stream()
+                    .filter(intf -> intf.vlan().equals(vlan))
+                    .collect(Collectors.toSet());
+        }
+
+        @Override
+        public Interface getMatchingInterface(IpAddress ip) {
+            return AVAILABLE_INTERFACES.stream()
+                    .filter(intf -> intf.ipAddressesList().contains(ip))
+                    .findFirst()
+                    .orElse(null);
+        }
+
+        @Override
+        public Set<Interface> getMatchingInterfaces(IpAddress ip) {
+            return AVAILABLE_INTERFACES.stream()
+                    .filter(intf -> intf.ipAddressesList().contains(ip))
+                    .collect(Collectors.toSet());
+        }
+    }
+
+    /**
+     * Test VPLS store.
+     */
+    public class TestVplsStore extends VplsStoreAdapter {
+        /**
+         * Clears the store.
+         */
+        public void clear() {
+            vplsDataMap.clear();
+        }
+
+        /**
+         * Gets the store delegate.
+         *
+         * @return the store delegate
+         */
+        public StoreDelegate<VplsStoreEvent> delegate() {
+            return this.delegate;
+        }
+    }
+
+    /**
+     * Test VPLS.
+     * Provides basic VPLS functionality and stores VPLS information.
+     */
+    public class TestVpls implements Vpls {
+        public Map<String, VplsData> testData;
+
+        public TestVpls() {
+            testData = Maps.newHashMap();
+        }
+
+        public void initSampleData() {
+            testData.clear();
+            VplsData vplsData = VplsData.of(VPLS1);
+            vplsData.addInterfaces(ImmutableSet.of(V100H1, V100H2));
+            vplsData.state(VplsData.VplsState.ADDED);
+            testData.put(VPLS1, vplsData);
+
+            vplsData = VplsData.of(VPLS2);
+            vplsData.addInterfaces(ImmutableSet.of(V200H1, V200H2));
+            vplsData.state(VplsData.VplsState.ADDED);
+            testData.put(VPLS2, vplsData);
+        }
+
+        @Override
+        public VplsData createVpls(String vplsName, EncapsulationType encapsulationType) {
+            VplsData vplsData = VplsData.of(vplsName, encapsulationType);
+            testData.put(vplsName, vplsData);
+            return vplsData;
+        }
+
+        @Override
+        public VplsData removeVpls(VplsData vplsData) {
+            if (!testData.containsKey(vplsData.name())) {
+                return null;
+            }
+
+            testData.remove(vplsData.name());
+            return vplsData;
+        }
+
+        @Override
+        public void addInterfaces(VplsData vplsData, Collection<Interface> interfaces) {
+            vplsData.addInterfaces(interfaces);
+            testData.put(vplsData.name(), vplsData);
+        }
+
+        @Override
+        public void addInterface(VplsData vplsData, Interface iface) {
+            vplsData.addInterface(iface);
+            testData.put(vplsData.name(), vplsData);
+        }
+
+        @Override
+        public void setEncapsulationType(VplsData vplsData, EncapsulationType encapsulationType) {
+            vplsData.encapsulationType(encapsulationType);
+            testData.put(vplsData.name(), vplsData);
+        }
+
+        @Override
+        public VplsData getVpls(String vplsName) {
+            return testData.get(vplsName);
+        }
+
+        @Override
+        public Collection<VplsData> getAllVpls() {
+            return testData.values();
+        }
+
+        @Override
+        public Collection<Interface> removeInterfaces(VplsData vplsData, Collection<Interface> interfaces) {
+            vplsData.removeInterfaces(interfaces);
+            testData.put(vplsData.name(), vplsData);
+            return interfaces;
+        }
+
+        @Override
+        public Interface removeInterface(VplsData vplsData, Interface iface) {
+            vplsData.removeInterface(iface);
+            testData.put(vplsData.name(), vplsData);
+            return iface;
+        }
+
+        @Override
+        public void removeAllVpls() {
+            testData.clear();
+        }
     }
 
     /**
      * Represents a fake IdGenerator class for intents.
      */
-    private static class TestIdGenerator implements IdGenerator {
-
+    protected static class TestIdGenerator implements IdGenerator {
         private final AtomicLong id = new AtomicLong(0);
 
         @Override
@@ -814,170 +551,135 @@
     }
 
     /**
-     * Test IntentSynchronizer that passes all intents straight through to the
-     * intent service.
+     * Test host service; contains all hosts which already generated.
+     *
      */
-    private class TestIntentSynchronizer implements IntentSynchronizationService {
+    public class TestHostService extends HostServiceAdapter {
 
-        private final IntentService intentService;
+        private HostListener listener;
 
-        /**
-         * Creates a new intent test synchronizer.
-         *
-         * @param intentService intent service
-         */
-        public TestIntentSynchronizer(IntentService intentService) {
-            this.intentService = intentService;
+        @Override
+        public Set<Host> getConnectedHosts(ConnectPoint connectPoint) {
+            return AVAILABLE_HOSTS.stream()
+                    .filter(host -> host.location().equals(connectPoint))
+                    .collect(Collectors.toSet());
         }
 
         @Override
-        public void submit(Intent intent) {
-            intentService.submit(intent);
+        public Set<Host> getHostsByMac(MacAddress mac) {
+            return AVAILABLE_HOSTS.stream()
+                    .filter(host -> host.mac().equals(mac))
+                    .collect(Collectors.toSet());
         }
 
         @Override
-        public void withdraw(Intent intent) {
-            intentService.withdraw(intent);
+        public Iterable<Host> getHosts() {
+            return AVAILABLE_HOSTS;
         }
 
         @Override
-        public void removeIntentsByAppId(ApplicationId applicationId) {
+        public Set<Host> getHostsByVlan(VlanId vlanId) {
+            return AVAILABLE_HOSTS.stream()
+                    .filter(host -> host.vlan().equals(vlanId))
+                    .collect(Collectors.toSet());
+        }
+
+        @Override
+        public int getHostCount() {
+            return AVAILABLE_HOSTS.size();
+        }
+
+        @Override
+        public Host getHost(HostId hostId) {
+            return AVAILABLE_HOSTS.stream()
+                    .filter(host -> host.id().equals(hostId))
+                    .findFirst()
+                    .orElse(null);
+        }
+
+        @Override
+        public void addListener(HostListener listener) {
+            this.listener = listener;
+        }
+
+        public void postHostEvent(HostEvent hostEvent) {
+            this.listener.event(hostEvent);
         }
     }
 
     /**
-     * Represents a fake VplsConfigService class which is needed for testing.
+     * Test network configuration service.
      */
-    private class TestVplsConfigService extends VplsConfigServiceAdapter {
+    public class TestConfigService extends NetworkConfigServiceAdapter {
+        public static final String EMPTY_JSON_TREE = "{}";
+        NetworkConfigListener listener;
+        VplsAppConfig vplsAppConfig;
 
-        private final SetMultimap<String, Interface> ifacesByVplsName;
-        private final Map<String, EncapsulationType> encapsByVplsName;
-
-        private Set<String> vplsAffectByApi = new HashSet<>();
-
-        TestVplsConfigService(SetMultimap<String, Interface> ifacesByVplsName,
-                              Map<String, EncapsulationType> encapsByVplsName) {
-            this.ifacesByVplsName = ifacesByVplsName;
-            this.encapsByVplsName = encapsByVplsName;
+        @Override
+        public void addListener(NetworkConfigListener listener) {
+            this.listener = listener;
         }
 
         @Override
-        public void addVpls(String vplsName, Set<String> ifaceNames, String encap) {
-            if (!ifacesByVplsName.containsKey(vplsName)) {
-                ifaceNames.forEach(ifaceName -> {
-                    AVAILABLE_INTERFACES.forEach(iface -> {
-                        if (iface.name().equals(ifaceName)) {
-                            ifacesByVplsName.put(vplsName, iface);
-                        }
-                    });
-                });
-            }
-            if (!ifacesByVplsName.containsKey(vplsName)) {
-                encapsByVplsName.put(vplsName, valueOf(encap));
+        public void removeListener(NetworkConfigListener listener) {
+            this.listener = null;
+        }
+
+        /**
+         * Sends network config event to listener.
+         *
+         * @param event the network config event
+         */
+        public void sendEvent(NetworkConfigEvent event) {
+            if (listener != null) {
+                listener.event(event);
             }
         }
 
-        @Override
-        public void removeVpls(String vplsName) {
-            if (ifacesByVplsName.containsKey(vplsName)) {
-                ifacesByVplsName.removeAll(vplsName);
+        /**
+         * Constructs test config service.
+         * Generates an VPLS configuration with sample VPLS configs.
+         */
+        public TestConfigService() {
+            vplsAppConfig = new VplsAppConfig();
+            final ObjectMapper mapper = new ObjectMapper();
+            final ConfigApplyDelegate delegate = new VplsAppConfigTest.MockCfgDelegate();
+            JsonNode tree = null;
+            try {
+                tree = new ObjectMapper().readTree(EMPTY_JSON_TREE);
+            } catch (IOException e) {
+                e.printStackTrace();
             }
+            vplsAppConfig.init(APPID, APP_NAME, tree, mapper, delegate);
+            VplsConfig vplsConfig = new VplsConfig(VPLS1,
+                                                   ImmutableSet.of(V100H1.name(), V100H2.name()),
+                                                   EncapsulationType.NONE);
+            vplsAppConfig.addVpls(vplsConfig);
+            vplsConfig = new VplsConfig(VPLS2,
+                                        ImmutableSet.of(V200H1.name(), V200H2.name()),
+                                        EncapsulationType.VLAN);
+            vplsAppConfig.addVpls(vplsConfig);
+
+        }
+
+        /**
+         * Overrides VPLS config to the config service.
+         *
+         * @param vplsAppConfig the new VPLS config
+         */
+        public void setConfig(VplsAppConfig vplsAppConfig) {
+            this.vplsAppConfig = vplsAppConfig;
         }
 
         @Override
-        public void addIface(String vplsName, String iface) {
-            if (!ifacesByVplsName.containsKey(vplsName)) {
-                AVAILABLE_INTERFACES.forEach(intf -> {
-                    if (intf.name().equals(iface)) {
-                        ifacesByVplsName.put(vplsName, intf);
-                    }
-                });
-            }
+        public <S, C extends Config<S>> C getConfig(S subject, Class<C> configClass) {
+            return (C) vplsAppConfig;
         }
 
         @Override
-        public void setEncap(String vplsName, String encap) {
-            encapsByVplsName.put(vplsName, EncapsulationType.enumFromString(encap));
-        }
-
-        @Override
-        public void removeIface(String iface) {
-            SetMultimap<String, Interface> search = HashMultimap.create(ifacesByVplsName);
-            search.entries().forEach(e -> {
-                if (e.getValue().name().equals(iface)) {
-                    ifacesByVplsName.remove(e.getKey(), iface);
-                }
-            });
-        }
-
-        @Override
-        public void cleanVplsConfig() {
-            ifacesByVplsName.clear();
-        }
-
-        @Override
-        public EncapsulationType encap(String vplsName) {
-            EncapsulationType encap = null;
-            if (encapsByVplsName.containsKey(vplsName)) {
-                encap = encapsByVplsName.get(vplsName);
-            }
-            return encap;
-        }
-
-        @Override
-        public Set<String> vplsAffectedByApi() {
-            Set<String> vplsNames = ImmutableSet.copyOf(vplsAffectByApi);
-
-            vplsAffectByApi.clear();
-
-            return vplsNames;
-        }
-
-        @Override
-        public Set<Interface> allIfaces() {
-            return ifacesByVplsName.values()
-                    .stream()
-                    .collect(Collectors.toSet());
-        }
-
-        @Override
-        public Set<Interface> ifaces(String name) {
-            return ifacesByVplsName.get(name)
-                    .stream()
-                    .collect(Collectors.toSet());
-        }
-
-        @Override
-        public Set<String> vplsNames() {
-            return ifacesByVplsName.keySet();
-        }
-
-        @Override
-        public Set<String> vplsNamesOld() {
-            return ifacesByVplsName.keySet();
-        }
-
-        public SetMultimap<String, Interface> ifacesByVplsName() {
-            return ImmutableSetMultimap.copyOf(ifacesByVplsName);
-        }
-
-        @Override
-        public SetMultimap<String, Interface> ifacesByVplsName(VlanId vlan,
-                                                               ConnectPoint connectPoint) {
-            String vplsName =
-                    ifacesByVplsName.entries().stream()
-                            .filter(e -> e.getValue().connectPoint().equals(connectPoint))
-                            .filter(e -> e.getValue().vlan().equals(vlan))
-                            .map(Map.Entry::getKey)
-                            .findFirst()
-                            .orElse(null);
-            SetMultimap<String, Interface> result = HashMultimap.create();
-            if (vplsName != null && ifacesByVplsName.containsKey(vplsName)) {
-                ifacesByVplsName.get(vplsName)
-                        .forEach(intf -> result.put(vplsName, intf));
-                return result;
-            }
-            return null;
+        public <S, C extends Config<S>> C addConfig(S subject, Class<C> configClass) {
+            return (C) vplsAppConfig;
         }
     }
+
 }
diff --git a/apps/vpls/src/test/java/org/onosproject/vpls/cli/VplsCommandTest.java b/apps/vpls/src/test/java/org/onosproject/vpls/cli/VplsCommandTest.java
new file mode 100644
index 0000000..eeff5ef
--- /dev/null
+++ b/apps/vpls/src/test/java/org/onosproject/vpls/cli/VplsCommandTest.java
@@ -0,0 +1,247 @@
+/*
+ * Copyright 2017-present Open Networking Laboratory
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onosproject.vpls.cli;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.onosproject.net.EncapsulationType;
+import org.onosproject.vpls.VplsTest;
+import org.onosproject.vpls.api.VplsData;
+
+import java.io.ByteArrayOutputStream;
+import java.io.PrintStream;
+import java.util.Collection;
+
+import static org.junit.Assert.*;
+
+/**
+ * Test for {@link VplsCommand}.
+ */
+public class VplsCommandTest extends VplsTest {
+    private static final String NEW_LINE = "\n";
+    private static final String SHOW_ALL_RES = "----------------\n" +
+            "VPLS name: \u001B[1mvpls2\u001B[0m\n" +
+            "Associated interfaces: [v200h2, v200h1]\n" +
+            "Encapsulation: NONE\n" +
+            "State: ADDED\n" +
+            "----------------\n" +
+            "VPLS name: \u001B[1mvpls1\u001B[0m\n" +
+            "Associated interfaces: [v100h1, v100h2]\n" +
+            "Encapsulation: NONE\n" +
+            "State: ADDED\n" +
+            "----------------\n";
+    private static final String SHOW_ONE_RES = "VPLS name: \u001B[1mvpls1\u001B[0m\n" +
+            "Associated interfaces: [v100h1, v100h2]\n" +
+            "Encapsulation: NONE\n" +
+            "State: ADDED\n";
+    private static final String IFACE_ALREADY_USED =
+            "\u001B[31mInterface \u001B[1mv200h1\u001B[0m\u001B[31m already associated " +
+            "to VPLS \u001B[1mvpls2\u001B[0m\u001B[31m\u001B[0m\n";
+    private static final String LIST_OUTPUT = VPLS1 + NEW_LINE + VPLS2 + NEW_LINE;
+    VplsCommand vplsCommand;
+
+    @Before
+    public void setup() {
+        vplsCommand = new VplsCommand();
+        vplsCommand.vpls = new TestVpls();
+        vplsCommand.interfaceService = new TestInterfaceService();
+    }
+
+    /**
+     * Creates a new VPLS.
+     */
+    @Test
+    public void testCreate() {
+        vplsCommand.command = VplsCommandEnum.CREATE.toString();
+        vplsCommand.vplsName = VPLS1;
+        vplsCommand.execute();
+        Collection<VplsData> vplss = vplsCommand.vpls.getAllVpls();
+        assertEquals(1, vplss.size());
+        VplsData result = vplss.iterator().next();
+        VplsData expected = VplsData.of(VPLS1, EncapsulationType.NONE);
+        assertEquals(expected, result);
+    }
+
+    /**
+     * Adds new network interface to a VPLS.
+     */
+    @Test
+    public void testAddIf() {
+        vplsCommand.create(VPLS1);
+
+        vplsCommand.command = VplsCommandEnum.ADD_IFACE.toString();
+        vplsCommand.vplsName = VPLS1;
+        vplsCommand.optArg = V100H1.name();
+        vplsCommand.execute();
+
+        vplsCommand.command = VplsCommandEnum.ADD_IFACE.toString();
+        vplsCommand.vplsName = VPLS1;
+        vplsCommand.optArg = V200H1.name();
+        vplsCommand.execute();
+
+        Collection<VplsData> vplss = vplsCommand.vpls.getAllVpls();
+        assertEquals(1, vplss.size());
+        VplsData result = vplss.iterator().next();
+        assertEquals(2, result.interfaces().size());
+        assertTrue(result.interfaces().contains(V100H1));
+        assertTrue(result.interfaces().contains(V200H1));
+    }
+
+    /**
+     * Removes network interface from a VPLS.
+     */
+    @Test
+    public void testRemIf() {
+        vplsCommand.create(VPLS1);
+        vplsCommand.addIface(VPLS1, V100H1.name());
+        vplsCommand.addIface(VPLS1, V200H1.name());
+
+        vplsCommand.command = VplsCommandEnum.REMOVE_IFACE.toString();
+        vplsCommand.vplsName = VPLS1;
+        vplsCommand.optArg = V200H1.name();
+        vplsCommand.execute();
+
+        Collection<VplsData> vplss = vplsCommand.vpls.getAllVpls();
+        assertEquals(1, vplss.size());
+        VplsData result = vplss.iterator().next();
+        assertEquals(1, result.interfaces().size());
+        assertTrue(result.interfaces().contains(V100H1));
+        assertFalse(result.interfaces().contains(V200H1));
+    }
+
+    /**
+     * Lists all VPLS names.
+     */
+    @Test
+    public void testList() {
+        ((TestVpls) vplsCommand.vpls).initSampleData();
+        ByteArrayOutputStream baos = new ByteArrayOutputStream();
+        PrintStream ps = new PrintStream(baos);
+        System.setOut(ps);
+        vplsCommand.command = VplsCommandEnum.LIST.toString();
+        vplsCommand.execute();
+        String result = baos.toString();
+
+        assertEquals(LIST_OUTPUT, result);
+    }
+
+    /**
+     * Sets encapsulation to a VPLS.
+     */
+    @Test
+    public void testSetEncap() {
+        ((TestVpls) vplsCommand.vpls).initSampleData();
+
+        // Sets to NONE
+        vplsCommand.command = VplsCommandEnum.SET_ENCAP.toString();
+        vplsCommand.vplsName = VPLS1;
+        vplsCommand.optArg = EncapsulationType.NONE.name();
+        vplsCommand.execute();
+        VplsData result = vplsCommand.vpls.getVpls(VPLS1);
+        assertEquals(result.encapsulationType(), EncapsulationType.NONE);
+
+        // Sets to VLAN
+        vplsCommand.command = VplsCommandEnum.SET_ENCAP.toString();
+        vplsCommand.vplsName = VPLS1;
+        vplsCommand.optArg = EncapsulationType.VLAN.name();
+        vplsCommand.execute();
+        result = vplsCommand.vpls.getVpls(VPLS1);
+        assertEquals(result.encapsulationType(), EncapsulationType.VLAN);
+
+        // Sets to MPLS
+        vplsCommand.command = VplsCommandEnum.SET_ENCAP.toString();
+        vplsCommand.vplsName = VPLS1;
+        vplsCommand.optArg = EncapsulationType.MPLS.name();
+        vplsCommand.execute();
+        result = vplsCommand.vpls.getVpls(VPLS1);
+        assertEquals(result.encapsulationType(), EncapsulationType.MPLS);
+    }
+
+    /**
+     * Deletes a VPLS.
+     */
+    @Test
+    public void testDelete() {
+        ((TestVpls) vplsCommand.vpls).initSampleData();
+        vplsCommand.command = VplsCommandEnum.DELETE.toString();
+        vplsCommand.vplsName = VPLS1;
+        vplsCommand.execute();
+        Collection<VplsData> vplss = vplsCommand.vpls.getAllVpls();
+        assertEquals(1, vplss.size());
+    }
+
+    /**
+     * Shows all VPLS information.
+     */
+    @Test
+    public void testShowAll() {
+        ((TestVpls) vplsCommand.vpls).initSampleData();
+        ByteArrayOutputStream baos = new ByteArrayOutputStream();
+        PrintStream ps = new PrintStream(baos);
+        System.setOut(ps);
+        vplsCommand.command = VplsCommandEnum.SHOW.toString();
+        vplsCommand.execute();
+        String result = baos.toString();
+        assertEquals(SHOW_ALL_RES, result);
+    }
+
+    /**
+     * Shows a VPLS information.
+     */
+    @Test
+    public void testShowOne() {
+        ((TestVpls) vplsCommand.vpls).initSampleData();
+        ByteArrayOutputStream baos = new ByteArrayOutputStream();
+        PrintStream ps = new PrintStream(baos);
+        System.setOut(ps);
+        vplsCommand.command = VplsCommandEnum.SHOW.toString();
+        vplsCommand.vplsName = VPLS1;
+        vplsCommand.execute();
+        String result = baos.toString();
+        assertEquals(SHOW_ONE_RES, result);
+    }
+
+    /**
+     * Adds a network interface which already related to another VPLS to a VPLS.
+     */
+    @Test
+    public void testIfaceAssociated() {
+        ((TestVpls) vplsCommand.vpls).initSampleData();
+        ByteArrayOutputStream baos = new ByteArrayOutputStream();
+        PrintStream ps = new PrintStream(baos);
+        System.setOut(ps);
+        vplsCommand.command = VplsCommandEnum.ADD_IFACE.toString();
+        vplsCommand.vplsName = VPLS1;
+        vplsCommand.optArg = V200H1.name();
+        vplsCommand.execute();
+
+        String result = baos.toString();
+        assertEquals(IFACE_ALREADY_USED, result);
+    }
+
+    /**
+     * Removes all VPLS.
+     */
+    @Test
+    public void testClean() {
+        ((TestVpls) vplsCommand.vpls).initSampleData();
+        vplsCommand.command = VplsCommandEnum.CLEAN.toString();
+        vplsCommand.execute();
+        Collection<VplsData> vplss = vplsCommand.vpls.getAllVpls();
+        assertEquals(0, vplss.size());
+    }
+}
diff --git a/apps/vpls/src/test/java/org/onosproject/vpls/cli/completer/VplsCommandCompleterTest.java b/apps/vpls/src/test/java/org/onosproject/vpls/cli/completer/VplsCommandCompleterTest.java
new file mode 100644
index 0000000..90d48df
--- /dev/null
+++ b/apps/vpls/src/test/java/org/onosproject/vpls/cli/completer/VplsCommandCompleterTest.java
@@ -0,0 +1,188 @@
+/*
+ * Copyright 2017-present Open Networking Laboratory
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onosproject.vpls.cli.completer;
+
+import com.google.common.collect.ImmutableList;
+import org.apache.felix.service.command.CommandSession;
+import org.apache.karaf.shell.console.CommandSessionHolder;
+import org.apache.karaf.shell.console.completer.ArgumentCompleter;
+import org.junit.Before;
+import org.junit.Test;
+import org.onosproject.incubator.net.intf.Interface;
+import org.onosproject.net.EncapsulationType;
+import org.onosproject.vpls.VplsTest;
+import org.onosproject.vpls.cli.VplsCommandEnum;
+
+import java.io.InputStream;
+import java.io.PrintStream;
+import java.util.Arrays;
+import java.util.List;
+import java.util.stream.Collectors;
+
+import static org.junit.Assert.*;
+
+public class VplsCommandCompleterTest extends VplsTest {
+    private static final String VPLS_CMD = "vpls";
+    private TestCommandSession commandSession;
+
+    @Before
+    public void setup() {
+        commandSession = new TestCommandSession();
+        CommandSessionHolder.setSession(commandSession);
+    }
+
+    /**
+     * Test VPLS command completer.
+     */
+    @Test
+    public void testCommandCompleter() {
+        VplsCommandCompleter commandCompleter = new VplsCommandCompleter();
+        List<String> choices = commandCompleter.choices();
+        List<String> expected = VplsCommandEnum.toStringList();
+        assertEquals(expected, choices);
+    }
+
+    /**
+     * Test VPLS name completer.
+     */
+    @Test
+    public void testNameCompleter() {
+        VplsNameCompleter vplsNameCompleter = new VplsNameCompleter();
+        vplsNameCompleter.vpls = new TestVpls();
+        ((TestVpls) vplsNameCompleter.vpls).initSampleData();
+        List<String> choices = vplsNameCompleter.choices();
+        List<String> expected = ImmutableList.of(VPLS1, VPLS2);
+
+        // Can not ensure the order, use contains all instead of equals
+        assertEquals(choices.size(), expected.size());
+        assertTrue(choices.containsAll(expected));
+    }
+
+    /**
+     * Test VPLS option arguments completer.
+     */
+    @Test
+    public void testOptArgCompleter() {
+        VplsOptArgCompleter completer = new VplsOptArgCompleter();
+        completer.vpls = new TestVpls();
+        ((TestVpls) completer.vpls).initSampleData();
+        completer.interfaceService = new TestInterfaceService();
+
+        // Add interface to VPLS
+        commandSession.updateArguments(VPLS_CMD, VplsCommandEnum.ADD_IFACE.toString(), VPLS1);
+
+        List<String> choices = completer.choices();
+        List<String> expected = ImmutableList.of(V300H1.name(),
+                                                 V300H2.name(),
+                                                 V400H1.name(),
+                                                 VNONEH1.name(),
+                                                 VNONEH2.name(),
+                                                 VNONEH3.name());
+
+        // Can not ensure the order, use contains all instead of equals
+        assertEquals(choices.size(), expected.size());
+        assertTrue(choices.containsAll(expected));
+
+        // Removes interface from VPLS
+        commandSession.updateArguments(VPLS_CMD, VplsCommandEnum.REMOVE_IFACE.toString(), VPLS1);
+        choices = completer.choices();
+        expected = completer.vpls.getVpls(VPLS1).interfaces().stream()
+                .map(Interface::name)
+                .collect(Collectors.toList());
+
+        // Can not ensure the order, use contains all instead of equals
+        assertEquals(choices.size(), expected.size());
+        assertTrue(choices.containsAll(expected));
+
+        // Sets encapsulation
+        commandSession.updateArguments(VPLS_CMD, VplsCommandEnum.SET_ENCAP.toString(), VPLS1);
+        choices = completer.choices();
+        expected = Arrays.stream(EncapsulationType.values())
+                .map(Enum::toString)
+                .collect(Collectors.toList());
+
+        // Can not ensure the order, use contains all instead of equals
+        assertEquals(choices.size(), expected.size());
+        assertTrue(choices.containsAll(expected));
+    }
+
+    /**
+     * Test command session.
+     */
+    class TestCommandSession implements CommandSession {
+        ArgumentCompleter.ArgumentList argumentList;
+        public TestCommandSession() {
+            String[] emptyStringArr = new String[0];
+            argumentList = new ArgumentCompleter.ArgumentList(emptyStringArr,
+                                                              0,
+                                                              0,
+                                                              0);
+        }
+
+        /**
+         * Updates argument list for the command session.
+         *
+         * @param args new arguments
+         */
+        public void updateArguments(String... args) {
+            argumentList = new ArgumentCompleter.ArgumentList(args,
+                                                              0,
+                                                              0,
+                                                              0);
+        }
+
+        @Override
+        public Object execute(CharSequence charSequence) throws Exception {
+            return null;
+        }
+
+        @Override
+        public void close() {
+
+        }
+
+        @Override
+        public InputStream getKeyboard() {
+            return null;
+        }
+
+        @Override
+        public PrintStream getConsole() {
+            return null;
+        }
+
+        @Override
+        public Object get(String s) {
+            return argumentList;
+        }
+
+        @Override
+        public void put(String s, Object o) {
+
+        }
+
+        @Override
+        public CharSequence format(Object o, int i) {
+            return null;
+        }
+
+        @Override
+        public Object convert(Class<?> aClass, Object o) {
+            return null;
+        }
+    }
+}
diff --git a/apps/vpls/src/test/java/org/onosproject/vpls/config/VplsAppConfigTest.java b/apps/vpls/src/test/java/org/onosproject/vpls/config/VplsAppConfigTest.java
index b3ca89d..37e7598 100644
--- a/apps/vpls/src/test/java/org/onosproject/vpls/config/VplsAppConfigTest.java
+++ b/apps/vpls/src/test/java/org/onosproject/vpls/config/VplsAppConfigTest.java
@@ -246,19 +246,28 @@
                      vplsAppConfig.getVplsWithName(VPLS1).encap());
     }
 
-    private class MockCfgDelegate implements ConfigApplyDelegate {
-
+    public static class MockCfgDelegate implements ConfigApplyDelegate {
         @Override
         public void onApply(@SuppressWarnings("rawtypes") Config config) {
             config.apply();
         }
     }
 
+    /**
+     * Creates a basic VPLS config.
+     *
+     * @return the VPLS config
+     */
     private VplsConfig createInitialVpls() {
         Set<String> ifaces = new HashSet<>(Arrays.asList(IF1, IF2, IF3));
         return new VplsConfig(VPLS1, ifaces, EncapsulationType.NONE);
     }
 
+    /**
+     * Creates another basic VPLS config.
+     *
+     * @return the VPLS config
+     */
     private VplsConfig createNewVpls() {
         Set<String> ifaces = new HashSet<>(Arrays.asList(IF4, IF5));
         return new VplsConfig(NEWVPLS, ifaces, EncapsulationType.NONE);
diff --git a/apps/vpls/src/test/java/org/onosproject/vpls/config/VplsConfigManagerTest.java b/apps/vpls/src/test/java/org/onosproject/vpls/config/VplsConfigManagerTest.java
new file mode 100644
index 0000000..8baae6c
--- /dev/null
+++ b/apps/vpls/src/test/java/org/onosproject/vpls/config/VplsConfigManagerTest.java
@@ -0,0 +1,146 @@
+/*
+ * Copyright 2017-present Open Networking Laboratory
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onosproject.vpls.config;
+
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.google.common.collect.ImmutableSet;
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+import org.onosproject.net.EncapsulationType;
+import org.onosproject.net.config.ConfigApplyDelegate;
+import org.onosproject.net.config.NetworkConfigEvent;
+import org.onosproject.net.config.NetworkConfigRegistryAdapter;
+import org.onosproject.vpls.VplsTest;
+import org.onosproject.vpls.api.VplsData;
+
+import java.io.IOException;
+import java.util.Collection;
+
+import static org.junit.Assert.*;
+public class VplsConfigManagerTest extends VplsTest {
+    VplsConfigManager vplsConfigManager;
+
+    @Before
+    public void setup() {
+        vplsConfigManager = new VplsConfigManager();
+        vplsConfigManager.configService = new TestConfigService();
+        vplsConfigManager.coreService = new TestCoreService();
+        vplsConfigManager.interfaceService = new TestInterfaceService();
+        vplsConfigManager.registry = new NetworkConfigRegistryAdapter();
+        vplsConfigManager.vpls = new TestVpls();
+        vplsConfigManager.leadershipService = new TestLeadershipService();
+
+        vplsConfigManager.activate();
+    }
+
+    @After
+    public void tearDown() {
+        vplsConfigManager.deactivate();
+    }
+
+    /**
+     * Reloads network configuration by sending a network config event.
+     */
+    @Test
+    public void testReloadConfig() {
+        NetworkConfigEvent event = new NetworkConfigEvent(NetworkConfigEvent.Type.CONFIG_ADDED,
+                                                          null,
+                                                          VplsAppConfig.class);
+        ((TestConfigService) vplsConfigManager.configService).sendEvent(event);
+
+        Collection<VplsData> vplss = vplsConfigManager.vpls.getAllVpls();
+        assertEquals(2, vplss.size());
+
+        VplsData expect = VplsData.of(VPLS1);
+        expect.addInterfaces(ImmutableSet.of(V100H1, V100H2));
+        expect.state(VplsData.VplsState.ADDED);
+        assertTrue(vplss.contains(expect));
+
+        expect = VplsData.of(VPLS2, EncapsulationType.VLAN);
+        expect.addInterfaces(ImmutableSet.of(V200H1, V200H2));
+        expect.state(VplsData.VplsState.ADDED);
+        System.out.println(vplss);
+        assertTrue(vplss.contains(expect));
+    }
+
+    /**
+     * Sends a network config event with null network config.
+     */
+    @Test
+    public void testReloadNullConfig() {
+        ((TestConfigService) vplsConfigManager.configService).setConfig(null);
+        NetworkConfigEvent event = new NetworkConfigEvent(NetworkConfigEvent.Type.CONFIG_ADDED,
+                                                          null,
+                                                          VplsAppConfig.class);
+        ((TestConfigService) vplsConfigManager.configService).sendEvent(event);
+
+        Collection<VplsData> vplss = vplsConfigManager.vpls.getAllVpls();
+        assertEquals(0, vplss.size());
+    }
+
+    /**
+     * Updates VPLSs by sending new VPLS config.
+     */
+    @Test
+    public void testReloadConfigUpdateVpls() {
+        ((TestVpls) vplsConfigManager.vpls).initSampleData();
+
+        VplsAppConfig vplsAppConfig = new VplsAppConfig();
+        final ObjectMapper mapper = new ObjectMapper();
+        final ConfigApplyDelegate delegate = new VplsAppConfigTest.MockCfgDelegate();
+        JsonNode tree = null;
+        try {
+            tree = new ObjectMapper().readTree(TestConfigService.EMPTY_JSON_TREE);
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+        vplsAppConfig.init(APPID, APP_NAME, tree, mapper, delegate);
+        VplsConfig vplsConfig = new VplsConfig(VPLS1,
+                                               ImmutableSet.of(V100H1.name()),
+                                               EncapsulationType.MPLS);
+        vplsAppConfig.addVpls(vplsConfig);
+        ((TestConfigService) vplsConfigManager.configService).setConfig(vplsAppConfig);
+        NetworkConfigEvent event = new NetworkConfigEvent(NetworkConfigEvent.Type.CONFIG_ADDED,
+                                                          null,
+                                                          VplsAppConfig.class);
+        ((TestConfigService) vplsConfigManager.configService).sendEvent(event);
+
+        Collection<VplsData> vplss = vplsConfigManager.vpls.getAllVpls();
+        assertEquals(1, vplss.size());
+
+        VplsData expect = VplsData.of(VPLS1, EncapsulationType.MPLS);
+        expect.addInterfaces(ImmutableSet.of(V100H1));
+        expect.state(VplsData.VplsState.ADDED);
+        assertTrue(vplss.contains(expect));
+    }
+
+    /**
+     * Remvoes all VPLS by sending CONFIG_REMOVED event.
+     */
+    @Test
+    public void testRemoveConfig() {
+        NetworkConfigEvent event = new NetworkConfigEvent(NetworkConfigEvent.Type.CONFIG_REMOVED,
+                                                          null,
+                                                          VplsAppConfig.class);
+        ((TestConfigService) vplsConfigManager.configService).sendEvent(event);
+
+        Collection<VplsData> vplss = vplsConfigManager.vpls.getAllVpls();
+        assertEquals(0, vplss.size());
+    }
+}
diff --git a/apps/vpls/src/test/java/org/onosproject/vpls/store/VplsStoreAdapter.java b/apps/vpls/src/test/java/org/onosproject/vpls/store/VplsStoreAdapter.java
new file mode 100644
index 0000000..bcc70af
--- /dev/null
+++ b/apps/vpls/src/test/java/org/onosproject/vpls/store/VplsStoreAdapter.java
@@ -0,0 +1,76 @@
+/*
+ * Copyright 2017-present Open Networking Laboratory
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.onosproject.vpls.store;
+
+import com.google.common.collect.Maps;
+import org.onosproject.store.StoreDelegate;
+import org.onosproject.vpls.api.VplsData;
+import org.onosproject.vpls.api.VplsStore;
+
+import java.util.Collection;
+import java.util.Map;
+
+/**
+ * Test adapter for VPLS store.
+ */
+public class VplsStoreAdapter implements VplsStore {
+    protected Map<String, VplsData> vplsDataMap;
+    protected StoreDelegate<VplsStoreEvent> delegate;
+
+    public VplsStoreAdapter() {
+        vplsDataMap = Maps.newHashMap();
+    }
+
+    @Override
+    public void setDelegate(StoreDelegate<VplsStoreEvent> delegate) {
+        this.delegate = delegate;
+    }
+
+    @Override
+    public void unsetDelegate(StoreDelegate<VplsStoreEvent> delegate) {
+        this.delegate = null;
+    }
+
+    @Override
+    public boolean hasDelegate() {
+        return this.delegate != null;
+    }
+
+    @Override
+    public void addVpls(VplsData vplsData) {
+        vplsDataMap.put(vplsData.name(), vplsData);
+    }
+
+    @Override
+    public void removeVpls(VplsData vplsData) {
+        vplsDataMap.remove(vplsData.name());
+    }
+
+    @Override
+    public void updateVpls(VplsData vplsData) {
+        vplsDataMap.put(vplsData.name(), vplsData);
+    }
+
+    @Override
+    public VplsData getVpls(String vplsName) {
+        return vplsDataMap.get(vplsName);
+    }
+
+    @Override
+    public Collection<VplsData> getAllVpls() {
+        return vplsDataMap.values();
+    }
+}
diff --git a/apps/vpls/src/test/java/org/onosproject/vpls/store/VplsStoreTest.java b/apps/vpls/src/test/java/org/onosproject/vpls/store/VplsStoreTest.java
new file mode 100644
index 0000000..31a2176
--- /dev/null
+++ b/apps/vpls/src/test/java/org/onosproject/vpls/store/VplsStoreTest.java
@@ -0,0 +1,129 @@
+/*
+ * Copyright 2017-present Open Networking Laboratory
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onosproject.vpls.store;
+
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+import org.onosproject.store.service.TestStorageService;
+import org.onosproject.vpls.VplsTest;
+import org.onosproject.vpls.api.VplsData;
+import org.onosproject.vpls.config.VplsAppConfig;
+import org.onosproject.vpls.config.VplsConfig;
+
+import java.util.Collection;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotEquals;
+import static org.junit.Assert.assertTrue;
+import static org.onosproject.net.EncapsulationType.VLAN;
+
+public class VplsStoreTest extends VplsTest {
+    private DistributedVplsStore vplsStore;
+
+    @Before
+    public void setup() {
+        vplsStore = new DistributedVplsStore();
+        vplsStore.coreService = new TestCoreService();
+        vplsStore.storageService = new TestStorageService();
+        vplsStore.networkConfigService = new TestConfigService();
+        vplsStore.active();
+    }
+
+    @After
+    public void tearDown() {
+        vplsStore.deactive();
+    }
+
+    /**
+     * Adds a VPLS to the store; checks if config store is also updated.
+     */
+    @Test
+    public void testAddVpls() {
+        VplsData vplsData = VplsData.of(VPLS1, VLAN);
+        vplsStore.addVpls(vplsData);
+        Collection<VplsData> vplsDataCollection = vplsStore.getAllVpls();
+
+        assertEquals(1, vplsDataCollection.size());
+        assertTrue(vplsDataCollection.contains(vplsData));
+
+        VplsAppConfig storedConfig = vplsStore.networkConfigService
+                .getConfig(null, VplsAppConfig.class);
+        assertNotEquals(-1L, storedConfig.updateTime());
+
+        assertEquals(1, storedConfig.vplss().size());
+
+        VplsConfig vplsConfig = storedConfig.vplss().iterator().next();
+
+        assertEquals(VPLS1, vplsConfig.name());
+        assertEquals(0, vplsConfig.ifaces().size());
+        assertEquals(VLAN, vplsConfig.encap());
+    }
+
+    /**
+     * Removes a VPLS from store; checks if config store is also updated.
+     */
+    @Test
+    public void testRemoveVpls() {
+        VplsData vplsData = VplsData.of(VPLS1, VLAN);
+        vplsStore.addVpls(vplsData);
+        vplsStore.removeVpls(vplsData);
+
+        Collection<VplsData> vplsDataCollection = vplsStore.getAllVpls();
+        assertEquals(0, vplsDataCollection.size());
+
+        VplsAppConfig storedConfig = vplsStore.networkConfigService
+                .getConfig(null, VplsAppConfig.class);
+
+        assertNotEquals(-1L, storedConfig.updateTime());
+
+        assertEquals(0, storedConfig.vplss().size());
+    }
+
+    /**
+     * Updates a VPLS from store; checks if config store is also updated.
+     */
+    @Test
+    public void testUpdateVpls() {
+        VplsData vplsData = VplsData.of(VPLS1, VLAN);
+        vplsStore.addVpls(vplsData);
+        vplsData.addInterface(V100H1);
+        vplsData.addInterface(V100H2);
+        vplsStore.updateVpls(vplsData);
+
+        Collection<VplsData> vplsDataCollection = vplsStore.getAllVpls();
+        assertEquals(1, vplsDataCollection.size());
+        VplsData newVplsData = vplsDataCollection.iterator().next();
+
+        assertEquals(vplsData, newVplsData);
+
+        VplsAppConfig storedConfig = vplsStore.networkConfigService
+                .getConfig(null, VplsAppConfig.class);
+
+        assertNotEquals(-1L, storedConfig.updateTime());
+
+        assertEquals(1, storedConfig.vplss().size());
+
+        VplsConfig vplsConfig = storedConfig.vplss().iterator().next();
+
+        assertEquals(VPLS1, vplsConfig.name());
+        assertEquals(2, vplsConfig.ifaces().size());
+        assertTrue(vplsConfig.ifaces().contains(V100H1.name()));
+        assertTrue(vplsConfig.ifaces().contains(V100H2.name()));
+        assertEquals(VLAN, vplsConfig.encap());
+    }
+}