Unit test for path intent installer

Change-Id: I8683885329d88ed19933c20f4fb96f8a6ba2242d

+/*
+ * 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.Arrays;
+import java.util.Collection;
+import java.util.List;
+
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+import org.onosproject.core.ApplicationId;
+import org.onosproject.core.CoreService;
+import org.onosproject.core.CoreServiceAdapter;
+import org.onosproject.core.IdGenerator;
+import org.onosproject.net.ConnectPoint;
+import org.onosproject.net.DefaultLink;
+import org.onosproject.net.DefaultPath;
+import org.onosproject.net.DeviceId;
+import org.onosproject.net.Link;
+import org.onosproject.net.flow.FlowRuleOperation;
+import org.onosproject.net.intent.FakeIntentManager;
+import org.onosproject.net.intent.Intent;
+import org.onosproject.net.intent.IntentInstaller;
+import org.onosproject.net.intent.IntentTestsMocks;
+import org.onosproject.net.intent.MockIdGenerator;
+import org.onosproject.net.intent.PathIntent;
+
+import com.google.common.collect.ImmutableList;
+
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.hamcrest.Matchers.*;
+import static org.onosproject.net.DefaultEdgeLink.createEdgeLink;
+import static org.onosproject.net.Link.Type.DIRECT;
+import static org.onosproject.net.NetTestTools.APP_ID;
+import static org.onosproject.net.NetTestTools.PID;
+import static org.onosproject.net.NetTestTools.connectPoint;
+
+/**
+ * Unit tests for path intent installer.
+ */
+public class PathIntentInstallerTest {
+
+    CoreService testCoreService;
+    IdGenerator idGenerator = new MockIdGenerator();
+    PathIntentInstaller installer;
+
+    private final IntentTestsMocks.MockSelector selector = new IntentTestsMocks.MockSelector();
+    private final IntentTestsMocks.MockTreatment treatment = new IntentTestsMocks.MockTreatment();
+    private final ConnectPoint d1p1 = connectPoint("s1", 0);
+    private final ConnectPoint d2p0 = connectPoint("s2", 0);
+    private final ConnectPoint d2p1 = connectPoint("s2", 1);
+    private final ConnectPoint d3p1 = connectPoint("s3", 1);
+    private final ConnectPoint d3p0 = connectPoint("s3", 10);
+    private final ConnectPoint d1p0 = connectPoint("s1", 10);
+
+    private final List<Link> links = Arrays.asList(
+            createEdgeLink(d1p0, true),
+            new DefaultLink(PID, d1p1, d2p0, DIRECT),
+            new DefaultLink(PID, d2p1, d3p1, DIRECT),
+            createEdgeLink(d3p0, false)
+    );
+    private final int hops = links.size() - 1;
+    private PathIntent intent;
+
+    /**
+     * Configures objects used in all the test cases.
+     */
+    @Before
+    public void localSetup() {
+        testCoreService = new TestCoreService();
+        Intent.bindIdGenerator(idGenerator);
+        installer = new PathIntentInstaller();
+        installer.coreService = testCoreService;
+        installer.intentManager = new MockIntentManager();
+        intent = new PathIntent(APP_ID, selector, treatment,
+                new DefaultPath(PID, links, hops), ImmutableList.of());
+    }
+
+    /**
+     * Tears down objects used in all the test cases.
+     */
+    @After
+    public void localTearDown() {
+        Intent.unbindIdGenerator(idGenerator);
+    }
+
+    /**
+     * Mock for core service.
+     */
+    private static class TestCoreService extends CoreServiceAdapter {
+
+        String registeredId = "";
+
+        @Override
+        public ApplicationId registerApplication(String identifier) {
+            registeredId = identifier;
+            return APP_ID;
+        }
+    }
+
+    /**
+     * Mock for intent manager service. Checks that the PathIntent
+     * installer installs and uninstalls properly.
+     */
+    private static class MockIntentManager extends FakeIntentManager {
+
+        boolean installerRegistered = false;
+
+        @Override
+        public <T extends Intent> void registerInstaller(
+                Class<T> cls,
+                IntentInstaller<T> installer) {
+            assertThat(cls.getCanonicalName(),
+                    equalTo("org.onosproject.net.intent.PathIntent"));
+            installerRegistered = true;
+        }
+
+        @Override
+        public <T extends Intent> void unregisterInstaller(Class<T> cls) {
+            assertThat(cls.getCanonicalName(),
+                    equalTo("org.onosproject.net.intent.PathIntent"));
+            assertThat(installerRegistered, is(true));
+        }
+
+    }
+
+    /**
+     * Tests activation and deactivation of the installer.
+     */
+    @Test
+    public void activateDeactivate() {
+        installer.activate();
+        installer.deactivate();
+    }
+
+    /**
+     * Checks that a flow operation contains the correct values.
+     *
+     * @param op flow rule operation to check
+     * @param type type the flow rule operation should have
+     * @param deviceId device id the flow rule operation should have
+     */
+    private void checkFlowOperation(FlowRuleOperation op,
+                                    FlowRuleOperation.Type type,
+                                    DeviceId deviceId) {
+        assertThat(op.type(), is(type));
+        assertThat(op.rule().deviceId(), equalTo(deviceId));
+    }
+
+    /**
+     * 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(hops));
+        FlowRuleOperation[] flowRuleOps =
+                flowRuleOpsCollection.toArray(new FlowRuleOperation[hops]);
+
+        FlowRuleOperation op0 = flowRuleOps[0];
+        checkFlowOperation(op0, FlowRuleOperation.Type.ADD, d1p0.deviceId());
+
+        FlowRuleOperation op1 = flowRuleOps[1];
+        checkFlowOperation(op1, FlowRuleOperation.Type.ADD, d2p0.deviceId());
+
+        FlowRuleOperation op2 = flowRuleOps[2];
+        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(hops));
+        FlowRuleOperation[] flowRuleOps =
+                flowRuleOpsCollection.toArray(new FlowRuleOperation[hops]);
+
+        FlowRuleOperation op0 = flowRuleOps[0];
+        checkFlowOperation(op0, FlowRuleOperation.Type.REMOVE, d1p0.deviceId());
+
+        FlowRuleOperation op1 = flowRuleOps[1];
+        checkFlowOperation(op1, FlowRuleOperation.Type.REMOVE, d2p0.deviceId());
+
+        FlowRuleOperation op2 = flowRuleOps[2];
+        checkFlowOperation(op2, FlowRuleOperation.Type.REMOVE, d3p0.deviceId());
+
+        installer.deactivate();
+    }
+}