[ONOS-3250] Add the junit test code of FixedIp

Change-Id: Ic8a6ff9d81b0bfca667bec49c11399e6cd3838db

+/*
+ * 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.onosproject.vtnrsc.FixedIp;
+import org.onosproject.vtnrsc.SubnetId;
+
+import com.google.common.testing.EqualsTester;
+
+/**
+ * Unit tests for FixedIp class.
+ */
+public class FixedIpTest {
+
+    final SubnetId subnetId1 = SubnetId.subnetId("lef11-95w-4er-9c9c");
+    final SubnetId subnetId2 = SubnetId.subnetId("lefaa-95w-4er-9c9c");
+    final IpAddress ip1 = IpAddress.valueOf("192.168.0.1");
+    final IpAddress ip2 = IpAddress.valueOf("192.168.1.1");
+
+    /**
+     * Checks that the FixedIp class is immutable.
+     */
+    @Test
+    public void testImmutability() {
+        assertThatClassIsImmutable(FixedIp.class);
+    }
+
+    /**
+     * Checks the operation of equals().
+     */
+    @Test
+    public void testEquals() {
+        FixedIp fixedIp1 = FixedIp.fixedIp(subnetId1, ip1);
+        FixedIp fixedIp2 = FixedIp.fixedIp(subnetId1, ip1);
+        FixedIp fixedIp3 = FixedIp.fixedIp(subnetId2, ip2);
+        new EqualsTester().addEqualityGroup(fixedIp1, fixedIp2)
+                .addEqualityGroup(fixedIp3).testEquals();
+    }
+
+    /**
+     * Checks the construction of a FixedIp object.
+     */
+    @Test
+    public void testConstruction() {
+        FixedIp fixedIp = FixedIp.fixedIp(subnetId1, ip1);
+        assertThat(ip1, is(notNullValue()));
+        assertThat(ip1, is(fixedIp.ip()));
+        assertThat(subnetId1, is(notNullValue()));
+        assertThat(subnetId1, is(fixedIp.subnetId()));
+    }
+}