Enhancing driver subsystem to support asynchronous event notifications.

Change-Id: I6850aae4f660b8328378da98460529eb58531732
diff --git a/core/net/src/test/java/org/onosproject/net/driver/impl/DriverRegistryManagerTest.java b/core/net/src/test/java/org/onosproject/net/driver/impl/DriverRegistryManagerTest.java
new file mode 100644
index 0000000..053bc29
--- /dev/null
+++ b/core/net/src/test/java/org/onosproject/net/driver/impl/DriverRegistryManagerTest.java
@@ -0,0 +1,149 @@
+/*
+ * Copyright 2017-present Open Networking Foundation
+ *
+ * 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.driver.impl;
+
+import com.google.common.collect.ImmutableList;
+import com.google.common.collect.ImmutableMap;
+import com.google.common.collect.Lists;
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+import org.onosproject.cfg.ComponentConfigAdapter;
+import org.onosproject.common.event.impl.TestEventDispatcher;
+import org.onosproject.component.ComponentService;
+import org.onosproject.core.ApplicationId;
+import org.onosproject.net.device.DeviceServiceAdapter;
+import org.onosproject.net.driver.DefaultDriver;
+import org.onosproject.net.driver.DefaultDriverProvider;
+import org.onosproject.net.driver.DriverEvent;
+import org.onosproject.net.driver.DriverListener;
+import org.onosproject.net.driver.TestBehaviour;
+import org.onosproject.net.driver.TestBehaviourImpl;
+
+import static org.junit.Assert.*;
+import static org.onosproject.net.driver.DefaultDriverTest.*;
+import static org.onosproject.net.driver.DriverEvent.Type.DRIVER_ENHANCED;
+import static org.onosproject.net.driver.DriverEvent.Type.DRIVER_REDUCED;
+
+/**
+ * Suite of tests for the driver registry mechanism.
+ */
+public class DriverRegistryManagerTest {
+
+    private DriverRegistryManager mgr;
+    private TestEventListener testListener = new TestEventListener();
+    private TestComponentService componentService = new TestComponentService();
+
+    @Before
+    public void setUp() {
+        mgr = new DriverRegistryManager();
+        mgr.deviceService = new DeviceServiceAdapter();
+        mgr.componentConfigService = new ComponentConfigAdapter();
+        mgr.eventDispatcher = new TestEventDispatcher();
+        mgr.componenService = componentService;
+        mgr.activate(null);
+    }
+
+    @After
+    public void tearDown() {
+        mgr.deactivate();
+    }
+
+    @Test
+    public void basicEvents() {
+        mgr.addListener(testListener);
+        DefaultDriverProvider mockProvider = new DefaultDriverProvider();
+        DefaultDriver driver = new DefaultDriver("foo", Lists.newArrayList(),
+                                                 MFR, HW, SW,
+                                                 ImmutableMap.of(TestBehaviour.class,
+                                                                 TestBehaviourImpl.class),
+                                                 ImmutableMap.of("foo", "bar"));
+        mockProvider.addDriver(driver);
+        mgr.registerProvider(mockProvider);
+        assertEquals("wrong driver event type", DRIVER_ENHANCED, testListener.event.type());
+        assertSame("wrong driver event subject", driver, testListener.event.subject());
+
+        mgr.unregisterProvider(mockProvider);
+        assertEquals("wrong driver event type", DRIVER_REDUCED, testListener.event.type());
+        assertSame("wrong driver event subject", driver, testListener.event.subject());
+
+        mgr.removeListener(testListener);
+    }
+
+    @Test
+    public void managerStart() {
+        DefaultDriverProvider mockProvider = new DefaultDriverProvider();
+        DefaultDriver driver = new DefaultDriver("default", Lists.newArrayList(),
+                                                 MFR, HW, SW,
+                                                 ImmutableMap.of(TestBehaviour.class,
+                                                                 TestBehaviourImpl.class),
+                                                 ImmutableMap.of("foo", "bar"));
+        mockProvider.addDriver(driver);
+        mgr.registerProvider(mockProvider);
+        assertTrue("should be activated", componentService.activated);
+
+        mgr.unregisterProvider(mockProvider);
+        assertFalse("should not be dactivated", componentService.activated);
+    }
+
+    @Test
+    public void basicQueries() {
+        DefaultDriverProvider mockProvider = new DefaultDriverProvider();
+        DefaultDriver driver = new DefaultDriver("default", Lists.newArrayList(),
+                                                 MFR, HW, SW,
+                                                 ImmutableMap.of(TestBehaviour.class,
+                                                                 TestBehaviourImpl.class),
+                                                 ImmutableMap.of("foo", "bar"));
+        mockProvider.addDriver(driver);
+        mgr.registerProvider(mockProvider);
+        assertSame("driver is missing", driver, mgr.getDriver("default"));
+        assertSame("driver is missing", driver, mgr.getDriver(MFR, HW, SW));
+        assertArrayEquals("driver list is wrong",
+                          ImmutableList.of(driver).toArray(),
+                          mgr.getDrivers().toArray());
+        assertArrayEquals("provider list is wrong",
+                          ImmutableList.of(mockProvider).toArray(),
+                          mgr.getProviders().toArray());
+        assertEquals("wrong behaviour class", TestBehaviourImpl.class,
+                     mgr.getBehaviourClass("org.onosproject.net.driver.TestBehaviourImpl"));
+    }
+
+    // TODO: add tests for REGEX matching and for driver inheritance
+
+    private class TestEventListener implements DriverListener {
+        private DriverEvent event;
+
+        @Override
+        public void event(DriverEvent event) {
+            this.event = event;
+        }
+    }
+
+    private class TestComponentService implements ComponentService {
+        private boolean activated;
+
+        @Override
+        public void activate(ApplicationId appId, String name) {
+            activated = true;
+        }
+
+        @Override
+        public void deactivate(ApplicationId appId, String name) {
+            activated = false;
+        }
+    }
+}
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