Unit test refactoring

- removed tests no longer useful now that all Intent objects are unique
- fixed intent object equality tests
- enabled several immutable base class tests
- renamed several Test....java classes to ...Test.Java to
  match project best practices

Change-Id: Ic829d6d39556d2f63323f5e82f3807dba86c62ec
diff --git a/core/net/src/test/java/org/onlab/onos/net/intent/impl/MultiPointToSinglePointIntentCompilerTest.java b/core/net/src/test/java/org/onlab/onos/net/intent/impl/MultiPointToSinglePointIntentCompilerTest.java
new file mode 100644
index 0000000..3727572
--- /dev/null
+++ b/core/net/src/test/java/org/onlab/onos/net/intent/impl/MultiPointToSinglePointIntentCompilerTest.java
@@ -0,0 +1,226 @@
+/*
+ * Copyright 2014 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.onlab.onos.net.intent.impl;
+
+import org.hamcrest.Matchers;
+import org.junit.Test;
+import org.onlab.onos.core.ApplicationId;
+import org.onlab.onos.TestApplicationId;
+import org.onlab.onos.net.ConnectPoint;
+import org.onlab.onos.net.ElementId;
+import org.onlab.onos.net.Path;
+import org.onlab.onos.net.flow.TrafficSelector;
+import org.onlab.onos.net.flow.TrafficTreatment;
+import org.onlab.onos.net.intent.AbstractIntentTest;
+import org.onlab.onos.net.intent.Intent;
+import org.onlab.onos.net.intent.IntentTestsMocks;
+import org.onlab.onos.net.intent.LinkCollectionIntent;
+import org.onlab.onos.net.intent.MultiPointToSinglePointIntent;
+import org.onlab.onos.net.topology.LinkWeight;
+import org.onlab.onos.net.topology.PathService;
+
+import java.util.HashSet;
+import java.util.List;
+import java.util.Set;
+
+import static org.hamcrest.CoreMatchers.notNullValue;
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.hamcrest.Matchers.hasSize;
+import static org.hamcrest.Matchers.is;
+import static org.onlab.onos.net.NetTestTools.connectPoint;
+import static org.onlab.onos.net.NetTestTools.createPath;
+import static org.onlab.onos.net.intent.LinksHaveEntryWithSourceDestinationPairMatcher.linksHasPath;
+
+/**
+ * Unit tests for the MultiPointToSinglePoint intent compiler.
+ */
+public class MultiPointToSinglePointIntentCompilerTest extends AbstractIntentTest {
+
+    private static final ApplicationId APPID = new TestApplicationId("foo");
+
+    private TrafficSelector selector = new IntentTestsMocks.MockSelector();
+    private TrafficTreatment treatment = new IntentTestsMocks.MockTreatment();
+
+    /**
+     * Mock path service for creating paths within the test.
+     */
+    private static class MockPathService implements PathService {
+
+        final String[] pathHops;
+
+        /**
+         * Constructor that provides a set of hops to mock.
+         *
+         * @param pathHops path hops to mock
+         */
+        MockPathService(String[] pathHops) {
+            this.pathHops = pathHops;
+        }
+
+        @Override
+        public Set<Path> getPaths(ElementId src, ElementId dst) {
+            Set<Path> result = new HashSet<>();
+
+            String[] allHops = new String[pathHops.length + 1];
+            allHops[0] = src.toString();
+            System.arraycopy(pathHops, 0, allHops, 1, pathHops.length);
+
+            result.add(createPath(allHops));
+            return result;
+        }
+
+        @Override
+        public Set<Path> getPaths(ElementId src, ElementId dst, LinkWeight weight) {
+            return null;
+        }
+    }
+
+    /**
+     * Creates a MultiPointToSinglePoint intent for a group of ingress points
+     * and an egress point.
+     *
+     * @param ingressIds array of ingress device ids
+     * @param egressId   device id of the egress point
+     * @return MultiPointToSinglePoint intent
+     */
+    private MultiPointToSinglePointIntent makeIntent(String[] ingressIds, String egressId) {
+        Set<ConnectPoint> ingressPoints = new HashSet<>();
+        ConnectPoint egressPoint = connectPoint(egressId, 1);
+
+        for (String ingressId : ingressIds) {
+            ingressPoints.add(connectPoint(ingressId, 1));
+        }
+
+        return new MultiPointToSinglePointIntent(APPID, selector, treatment,
+                                                 ingressPoints, egressPoint);
+    }
+
+    /**
+     * Creates a compiler for MultiPointToSinglePoint intents.
+     *
+     * @param hops hops to use while computing paths for this intent
+     * @return MultiPointToSinglePoint intent
+     */
+    private MultiPointToSinglePointIntentCompiler makeCompiler(String[] hops) {
+        MultiPointToSinglePointIntentCompiler compiler =
+                new MultiPointToSinglePointIntentCompiler();
+        compiler.pathService = new MockPathService(hops);
+        return compiler;
+    }
+
+    /**
+     * Tests a single ingress point with 8 hops to its egress point.
+     */
+    @Test
+    public void testSingleLongPathCompilation() {
+
+        String[] ingress = {"ingress"};
+        String egress = "egress";
+
+        MultiPointToSinglePointIntent intent = makeIntent(ingress, egress);
+        assertThat(intent, is(notNullValue()));
+
+        String[] hops = {"h1", "h2", "h3", "h4", "h5", "h6", "h7", "h8",
+                egress};
+        MultiPointToSinglePointIntentCompiler compiler = makeCompiler(hops);
+        assertThat(compiler, is(notNullValue()));
+
+        List<Intent> result = compiler.compile(intent, null, null);
+        assertThat(result, is(Matchers.notNullValue()));
+        assertThat(result, hasSize(1));
+        Intent resultIntent = result.get(0);
+        assertThat(resultIntent instanceof LinkCollectionIntent, is(true));
+
+        if (resultIntent instanceof LinkCollectionIntent) {
+            LinkCollectionIntent linkIntent = (LinkCollectionIntent) resultIntent;
+            assertThat(linkIntent.links(), hasSize(9));
+            assertThat(linkIntent.links(), linksHasPath("ingress", "h1"));
+            assertThat(linkIntent.links(), linksHasPath("h1", "h2"));
+            assertThat(linkIntent.links(), linksHasPath("h2", "h3"));
+            assertThat(linkIntent.links(), linksHasPath("h4", "h5"));
+            assertThat(linkIntent.links(), linksHasPath("h5", "h6"));
+            assertThat(linkIntent.links(), linksHasPath("h7", "h8"));
+            assertThat(linkIntent.links(), linksHasPath("h8", "egress"));
+        }
+    }
+
+    /**
+     * Tests a simple topology where two ingress points share some path segments
+     * and some path segments are not shared.
+     */
+    @Test
+    public void testTwoIngressCompilation() {
+        String[] ingress = {"ingress1", "ingress2"};
+        String egress = "egress";
+
+        MultiPointToSinglePointIntent intent = makeIntent(ingress, egress);
+        assertThat(intent, is(notNullValue()));
+
+        final String[] hops = {"inner1", "inner2", egress};
+        MultiPointToSinglePointIntentCompiler compiler = makeCompiler(hops);
+        assertThat(compiler, is(notNullValue()));
+
+        List<Intent> result = compiler.compile(intent, null, null);
+        assertThat(result, is(notNullValue()));
+        assertThat(result, hasSize(1));
+        Intent resultIntent = result.get(0);
+        assertThat(resultIntent instanceof LinkCollectionIntent, is(true));
+
+        if (resultIntent instanceof LinkCollectionIntent) {
+            LinkCollectionIntent linkIntent = (LinkCollectionIntent) resultIntent;
+            assertThat(linkIntent.links(), hasSize(4));
+            assertThat(linkIntent.links(), linksHasPath("ingress1", "inner1"));
+            assertThat(linkIntent.links(), linksHasPath("ingress2", "inner1"));
+            assertThat(linkIntent.links(), linksHasPath("inner1", "inner2"));
+            assertThat(linkIntent.links(), linksHasPath("inner2", "egress"));
+        }
+    }
+
+    /**
+     * Tests a large number of ingress points that share a common path to the
+     * egress point.
+     */
+    @Test
+    public void testMultiIngressCompilation() {
+        String[] ingress = {"i1", "i2", "i3", "i4", "i5",
+                "i6", "i7", "i8", "i9", "i10"};
+        String egress = "e";
+
+        MultiPointToSinglePointIntent intent = makeIntent(ingress, egress);
+        assertThat(intent, is(notNullValue()));
+
+        final String[] hops = {"n1", egress};
+        MultiPointToSinglePointIntentCompiler compiler = makeCompiler(hops);
+        assertThat(compiler, is(notNullValue()));
+
+        List<Intent> result = compiler.compile(intent, null, null);
+        assertThat(result, is(notNullValue()));
+        assertThat(result, hasSize(1));
+        Intent resultIntent = result.get(0);
+        assertThat(resultIntent instanceof LinkCollectionIntent, is(true));
+
+        if (resultIntent instanceof LinkCollectionIntent) {
+            LinkCollectionIntent linkIntent = (LinkCollectionIntent) resultIntent;
+            assertThat(linkIntent.links(), hasSize(ingress.length + 1));
+            for (String ingressToCheck : ingress) {
+                assertThat(linkIntent.links(),
+                           linksHasPath(ingressToCheck,
+                                        "n1"));
+            }
+            assertThat(linkIntent.links(), linksHasPath("n1", egress));
+        }
+    }
+}