[ONOS-3229]Add the junit test code of TenantId

Change-Id: Ib5bd6a6c76fa11d3da7b50727c97ee6d4503c136

@@ -37,4 +37,21 @@
         <module>vtnweb</module>
         <module>app</module>
   	</modules>
+  	<dependencies>
+  	    <dependency>
+            <groupId>org.onosproject</groupId>
+            <artifactId>onlab-junit</artifactId>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>com.google.guava</groupId>
+            <artifactId>guava-testlib</artifactId>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.easymock</groupId>
+            <artifactId>easymock</artifactId>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
 </project>

+/*
+ * 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.tenantnetwork;
+
+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.onosproject.vtnrsc.TenantId;
+
+import com.google.common.testing.EqualsTester;
+
+/**
+ * Unit tests for TenantId class.
+ */
+public class TenantIdTest {
+
+    final TenantId tenantId1 = TenantId.tenantId("1");
+    final TenantId sameAsTenantId1 = TenantId.tenantId("1");
+    final TenantId tenantId2 = TenantId.tenantId("2");
+
+    /**
+     * Checks that the TenantId class is immutable.
+     */
+    @Test
+    public void testImmutability() {
+        assertThatClassIsImmutable(TenantId.class);
+    }
+
+    /**
+     * Checks the operation of equals() methods.
+     */
+    @Test
+    public void testEquals() {
+        new EqualsTester().addEqualityGroup(tenantId1, sameAsTenantId1).addEqualityGroup(tenantId2)
+                .testEquals();
+    }
+
+    /**
+     * Checks the construction of a TenantId object.
+     */
+    @Test
+    public void testConstruction() {
+        final String tenantIdValue = "s";
+        final TenantId tenantId = TenantId.tenantId(tenantIdValue);
+        assertThat(tenantId, is(notNullValue()));
+        assertThat(tenantId.tenantId(), is(tenantIdValue));
+    }
+}