Add unit test for link collection intent installer

Change-Id: Ifd89b9868b320546bc55ba78e207993e35aaf50c

+/*
+ * Copyright 2015 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.intent.impl;
+
+import java.util.Collection;
+import java.util.List;
+import java.util.Set;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.onosproject.net.DefaultLink;
+import org.onosproject.net.DeviceId;
+import org.onosproject.net.Link;
+import org.onosproject.net.flow.FlowRuleOperation;
+import org.onosproject.net.intent.LinkCollectionIntent;
+
+import com.google.common.collect.ImmutableSet;
+
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.hamcrest.Matchers.hasSize;
+import static org.hamcrest.Matchers.notNullValue;
+import static org.onosproject.net.Link.Type.DIRECT;
+import static org.onosproject.net.NetTestTools.APP_ID;
+import static org.onosproject.net.NetTestTools.PID;
+
+public class LinkCollectionIntentInstallerTest extends  IntentInstallerTest {
+
+    LinkCollectionIntentInstaller installer;
+
+    private final Set<Link> links = ImmutableSet.of(
+            new DefaultLink(PID, d1p1, d2p0, DIRECT),
+            new DefaultLink(PID, d2p1, d3p1, DIRECT),
+            new DefaultLink(PID, d1p1, d3p1, DIRECT));
+
+    private LinkCollectionIntent intent;
+
+    /**
+     * Configures objects used in all the test cases.
+     */
+    @Before
+    public void localSetUp() {
+        installer = new LinkCollectionIntentInstaller();
+        installer.coreService = testCoreService;
+        installer.intentManager =
+                new IntentInstallerTest.MockIntentManager(LinkCollectionIntent.class);
+        intent = new LinkCollectionIntent(APP_ID, selector, treatment, links, d1p1, d3p1);
+    }
+
+    private FlowRuleOperation findOperation(Collection<FlowRuleOperation> ops,
+                                            DeviceId deviceId) {
+        for (FlowRuleOperation op : ops) {
+            if (op.rule().deviceId().equals(deviceId)) {
+                return op;
+            }
+        }
+        return null;
+    }
+
+    /**
+     * Tests activation and deactivation of the installer.
+     */
+    @Test
+    public void activateDeactivate() {
+        installer.activate();
+        installer.deactivate();
+    }
+
+    /**
+     * Tests installation operation of the path intent installer.
+     */
+    @Test
+    public void install() {
+        installer.activate();
+
+        List<Collection<FlowRuleOperation>> operations =
+                installer.install(intent);
+        assertThat(operations, notNullValue());
+        assertThat(operations, hasSize(1));
+
+        Collection<FlowRuleOperation> flowRuleOpsCollection = operations.get(0);
+        assertThat(flowRuleOpsCollection, hasSize(links.size()));
+
+        FlowRuleOperation op0 = findOperation(flowRuleOpsCollection,
+                d1p0.deviceId());
+        checkFlowOperation(op0, FlowRuleOperation.Type.ADD, d1p0.deviceId());
+
+        FlowRuleOperation op1 = findOperation(flowRuleOpsCollection,
+                d2p0.deviceId());
+        checkFlowOperation(op1, FlowRuleOperation.Type.ADD, d2p0.deviceId());
+
+        FlowRuleOperation op2 = findOperation(flowRuleOpsCollection,
+                d3p0.deviceId());
+        checkFlowOperation(op2, FlowRuleOperation.Type.ADD, d3p0.deviceId());
+
+        installer.deactivate();
+    }
+
+    /**
+     * Checks the uninstall operation of the path intent installer.
+     */
+    @Test
+    public void uninstall() {
+        installer.activate();
+
+        List<Collection<FlowRuleOperation>> operations =
+                installer.uninstall(intent);
+        assertThat(operations, notNullValue());
+        assertThat(operations, hasSize(1));
+
+        Collection<FlowRuleOperation> flowRuleOpsCollection = operations.get(0);
+        assertThat(flowRuleOpsCollection, hasSize(links.size()));
+
+        FlowRuleOperation op0 = findOperation(flowRuleOpsCollection,
+                d1p0.deviceId());
+        checkFlowOperation(op0, FlowRuleOperation.Type.REMOVE, d1p0.deviceId());
+
+        FlowRuleOperation op1 = findOperation(flowRuleOpsCollection,
+                d2p0.deviceId());
+        checkFlowOperation(op1, FlowRuleOperation.Type.REMOVE, d2p0.deviceId());
+
+        FlowRuleOperation op2 = findOperation(flowRuleOpsCollection,
+                d3p0.deviceId());
+        checkFlowOperation(op2, FlowRuleOperation.Type.REMOVE, d3p0.deviceId());
+
+        installer.deactivate();
+    }
+}