Unit tests for Neighbour Resolution Service.

This patch involves a refactoring to split the neighbour actions
implementation out from the main NeighbourResolutionManager class.

ONOS-5276

Change-Id: I082b401ae9046a1ed983610af05da112bd2683d3
diff --git a/core/api/src/test/java/org/onosproject/net/edge/EdgePortServiceAdapter.java b/core/api/src/test/java/org/onosproject/net/edge/EdgePortServiceAdapter.java
new file mode 100644
index 0000000..d38f05e
--- /dev/null
+++ b/core/api/src/test/java/org/onosproject/net/edge/EdgePortServiceAdapter.java
@@ -0,0 +1,64 @@
+/*
+ * 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.net.edge;
+
+import org.onosproject.net.ConnectPoint;
+import org.onosproject.net.DeviceId;
+import org.onosproject.net.flow.TrafficTreatment;
+
+import java.nio.ByteBuffer;
+import java.util.Optional;
+
+/**
+ * Adapter for tests involving the edge port service.
+ */
+public class EdgePortServiceAdapter implements EdgePortService {
+    @Override
+    public void addListener(EdgePortListener listener) {
+
+    }
+
+    @Override
+    public void removeListener(EdgePortListener listener) {
+
+    }
+
+    @Override
+    public boolean isEdgePoint(ConnectPoint point) {
+        return false;
+    }
+
+    @Override
+    public Iterable<ConnectPoint> getEdgePoints() {
+        return null;
+    }
+
+    @Override
+    public Iterable<ConnectPoint> getEdgePoints(DeviceId deviceId) {
+        return null;
+    }
+
+    @Override
+    public void emitPacket(ByteBuffer data, Optional<TrafficTreatment> treatment) {
+
+    }
+
+    @Override
+    public void emitPacket(DeviceId deviceId, ByteBuffer data, Optional<TrafficTreatment> treatment) {
+
+    }
+}
diff --git a/core/api/src/test/java/org/onosproject/net/packet/DefaultPacketContextTest.java b/core/api/src/test/java/org/onosproject/net/packet/DefaultPacketContextTest.java
index d8e55db..ea45e09 100644
--- a/core/api/src/test/java/org/onosproject/net/packet/DefaultPacketContextTest.java
+++ b/core/api/src/test/java/org/onosproject/net/packet/DefaultPacketContextTest.java
@@ -15,15 +15,14 @@
  */
 package org.onosproject.net.packet;
 
-import java.nio.ByteBuffer;
-
+import com.google.common.testing.EqualsTester;
 import org.junit.Test;
-import org.onosproject.net.flow.TrafficTreatment;
-import org.onosproject.net.intent.IntentTestsMocks;
 import org.onlab.packet.Ethernet;
 import org.onlab.packet.MacAddress;
+import org.onosproject.net.flow.TrafficTreatment;
+import org.onosproject.net.intent.IntentTestsMocks;
 
-import com.google.common.testing.EqualsTester;
+import java.nio.ByteBuffer;
 
 import static org.hamcrest.MatcherAssert.assertThat;
 import static org.hamcrest.Matchers.is;
@@ -50,30 +49,12 @@
                     treatment,
                     byteBuffer);
 
-    static class MockPacketContext extends DefaultPacketContext {
-
-        protected MockPacketContext(long time, InboundPacket inPkt,
-                                       OutboundPacket outPkt, boolean block) {
-            super(time, inPkt, outPkt, block);
-        }
-
-        @Override
-        public void send() {
-
-        }
-
-        @Override
-        public boolean block() {
-            return super.block();
-        }
-    }
-
     final DefaultPacketContext context1 =
-            new MockPacketContext(123L, inPacket, outPacket, true);
+            new PacketContextAdapter(123L, inPacket, outPacket, true);
     final DefaultPacketContext sameAsContext1 =
-            new MockPacketContext(123L, inPacket, outPacket, true);
+            new PacketContextAdapter(123L, inPacket, outPacket, true);
     final DefaultPacketContext context2 =
-            new MockPacketContext(123123L, inPacket, outPacket, true);
+            new PacketContextAdapter(123123L, inPacket, outPacket, true);
 
     /**
      * Checks that the DefaultOutboundPacket class is immutable but can be
diff --git a/core/api/src/test/java/org/onosproject/net/packet/PacketContextAdapter.java b/core/api/src/test/java/org/onosproject/net/packet/PacketContextAdapter.java
new file mode 100644
index 0000000..939eab7
--- /dev/null
+++ b/core/api/src/test/java/org/onosproject/net/packet/PacketContextAdapter.java
@@ -0,0 +1,35 @@
+/*
+ * 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.net.packet;
+
+/**
+ * Instantiable version of DefaultPacketContext for use in unit tests that need
+ * to provide a PacketContext as input data.
+ */
+public class PacketContextAdapter extends DefaultPacketContext {
+
+    public PacketContextAdapter(long time, InboundPacket inPkt,
+                                OutboundPacket outPkt, boolean block) {
+        super(time, inPkt, outPkt, block);
+    }
+
+    @Override
+    public void send() {
+
+    }
+
+}