added Host-related unit tests

Change-Id: Ia3c0610f5bdd91ddd554dd477af7ad3640a6cef3
diff --git a/core/api/src/test/java/org/onlab/onos/net/HostIdTest.java b/core/api/src/test/java/org/onlab/onos/net/HostIdTest.java
index 3adcabc..fefc499 100644
--- a/core/api/src/test/java/org/onlab/onos/net/HostIdTest.java
+++ b/core/api/src/test/java/org/onlab/onos/net/HostIdTest.java
@@ -1,21 +1,30 @@
 package org.onlab.onos.net;
 
 import com.google.common.testing.EqualsTester;
+
 import org.junit.Test;
+import org.onlab.packet.MACAddress;
+import org.onlab.packet.VLANID;
 
 import static org.onlab.onos.net.HostId.hostId;
 
 /**
- * Test of the host identifier.
+ * Test for the host identifier.
  */
 public class HostIdTest extends ElementIdTest {
 
+    private static final MACAddress MAC1 = MACAddress.valueOf("00:11:00:00:00:01");
+    private static final MACAddress MAC2 = MACAddress.valueOf("00:22:00:00:00:02");
+    private static final VLANID VLAN1 = VLANID.vlanId((short) 11);
+    private static final VLANID VLAN2 = VLANID.vlanId((short) 22);
+
+    @Override
     @Test
     public void basics() {
         new EqualsTester()
-                .addEqualityGroup(hostId("nic:foo"),
-                                  hostId("nic:foo"))
-                .addEqualityGroup(hostId("nic:bar"))
+                .addEqualityGroup(hostId("nic:00:11:00:00:00:01/11"),
+                                  hostId(MAC1, VLAN1))
+                .addEqualityGroup(hostId(MAC2, VLAN2))
                 .testEquals();
     }