[ONOS-3248] Add the junit test code of AllowedAddressPair

Change-Id: I8d4086353f37febd15de5323446e22dd57b4e437

+/*
+ * 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.vtnrsc.virtualport;
+
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.hamcrest.Matchers.is;
+import static org.hamcrest.Matchers.notNullValue;
+import static org.onlab.junit.ImmutableClassChecker.assertThatClassIsImmutable;
+
+import org.junit.Test;
+import org.onlab.packet.IpAddress;
+import org.onlab.packet.MacAddress;
+import org.onosproject.vtnrsc.AllowedAddressPair;
+
+import com.google.common.testing.EqualsTester;
+
+/**
+ * Unit tests for AllowedAddressPair class.
+ */
+public class AllowedAddressPairTest {
+
+    final IpAddress ip1 = IpAddress.valueOf("192.168.0.1");
+    final IpAddress ip2 = IpAddress.valueOf("192.168.0.2");
+    final MacAddress mac1 = MacAddress.valueOf("fa:16:3e:76:83:88");
+    final MacAddress mac2 = MacAddress.valueOf("aa:16:3e:76:83:88");
+
+    /**
+     * Checks that the AllowedAddressPair class is immutable.
+     */
+    @Test
+    public void testImmutability() {
+        assertThatClassIsImmutable(AllowedAddressPair.class);
+    }
+
+    /**
+     * Checks the operation of equals().
+     */
+    @Test
+    public void testEquals() {
+        AllowedAddressPair p1 = AllowedAddressPair
+                .allowedAddressPair(ip1, mac1);
+        AllowedAddressPair p2 = AllowedAddressPair
+                .allowedAddressPair(ip1, mac1);
+        AllowedAddressPair p3 = AllowedAddressPair
+                .allowedAddressPair(ip2, mac2);
+        new EqualsTester().addEqualityGroup(p1, p2).addEqualityGroup(p3)
+                .testEquals();
+    }
+
+    /**
+     * Checks the construction of a AllowedAddressPair object.
+     */
+    @Test
+    public void testConstruction() {
+        AllowedAddressPair allowedAddressPair = AllowedAddressPair
+                .allowedAddressPair(ip1, mac1);
+        assertThat(ip1, is(notNullValue()));
+        assertThat(ip1, is(allowedAddressPair.ip()));
+        assertThat(mac1, is(notNullValue()));
+        assertThat(mac1, is(allowedAddressPair.mac()));
+    }
+}