diff --git a/incubator/api/src/test/java/org/onosproject/incubator/net/l2monitoring/cfm/identifier/MdIdTest.java b/incubator/api/src/test/java/org/onosproject/incubator/net/l2monitoring/cfm/identifier/MdIdTest.java
new file mode 100644
index 0000000..18af6b6
--- /dev/null
+++ b/incubator/api/src/test/java/org/onosproject/incubator/net/l2monitoring/cfm/identifier/MdIdTest.java
@@ -0,0 +1,170 @@
+/*
+ * 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.incubator.net.l2monitoring.cfm.identifier;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertNull;
+import static org.junit.Assert.assertTrue;
+import static org.junit.Assert.fail;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.onlab.packet.MacAddress;
+import org.onosproject.incubator.net.l2monitoring.cfm.service.CfmConfigException;
+
+import com.google.common.net.InternetDomainName;
+
+public class MdIdTest {
+
+    MdId mdId1;
+    MdId mdId2;
+    MdId mdId3;
+    MdId mdId4;
+
+    @Before
+    public void setUp() throws Exception, CfmConfigException {
+        mdId1 = MdIdCharStr.asMdId("md-1");
+        mdId2 = MdIdDomainName.asMdId("md.domain.tld");
+        mdId3 = MdIdMacUint.asMdId(MacAddress.valueOf("AA:BB:cc:dd:ee:ff"), 54321);
+        mdId4 = MdIdNone.asMdId();
+    }
+
+    @Test
+    public void testMdNameWrong() {
+
+        try {
+            MdIdCharStr.asMdId("");
+            fail("Expected an exception");
+        } catch (IllegalArgumentException e) {
+            assertTrue(e.getMessage().contains("MD Name must follow pattern"));
+        }
+
+        try {
+            MdIdCharStr.asMdId("name with spaces and other stuff");
+            fail("Expected an exception");
+        } catch (IllegalArgumentException e) {
+            assertTrue(e.getMessage().contains("MD Name must follow pattern"));
+        }
+
+        try {
+            MdIdCharStr.asMdId("NameIsTooLongItShouldNotExceedFortyFiveCharacters");
+            fail("Expected an exception");
+        } catch (IllegalArgumentException e) {
+            assertTrue(e.getMessage().contains("MD Name must follow pattern"));
+        }
+
+        try {
+            MdIdCharStr.asMdId(null);
+            fail("Expected an exception");
+        } catch (IllegalArgumentException e) {
+            assertTrue(e.getMessage().contains("MD Name must follow pattern"));
+        }
+
+
+        try {
+            MdIdDomainName.asMdId((String) null);
+            fail("Expected an exception");
+        } catch (IllegalArgumentException e) {
+            assertTrue(e.getMessage().contains("MD Name must follow internet domain"));
+        }
+
+        try {
+            MdIdDomainName.asMdId("name with spaces");
+            fail("Expected an exception");
+        } catch (IllegalArgumentException e) {
+            assertTrue(e.getMessage().contains("MD Name must follow internet domain"));
+        }
+
+        try {
+            MdIdDomainName.asMdId(InternetDomainName
+                    .from("a.really.long.domain.name.which.is.more.than.45.chars.long"));
+            fail("Expected an exception");
+        } catch (IllegalArgumentException e) {
+            assertTrue(e.getMessage().contains("MD Domain Name must be between 1 and 45 chars long"));
+        }
+
+        try {
+            MdIdMacUint.asMdId("AA:BB:cc:dd:ee:ff:70000");
+            fail("Expected an exception");
+        } catch (IllegalArgumentException e) {
+            assertTrue(e.getMessage().contains("uInt must be between 0 and 65535"));
+        }
+
+        try {
+            MdIdMacUint.asMdId("something:12345");
+            fail("Expected an exception");
+        } catch (IllegalArgumentException e) {
+            assertTrue(e.getMessage().contains("MD Name must follow pattern"));
+        }
+}
+
+    @Test
+    public void testMdName() {
+        assertEquals("md-1", mdId1.mdName());
+        assertEquals("md.domain.tld", mdId2.mdName());
+        assertEquals("AA:BB:cc:dd:ee:ff:54321".toUpperCase(), mdId3.mdName());
+        assertNull(mdId4.mdName());
+    }
+
+    @Test
+    public void testGetNameLength() {
+        assertEquals(4, mdId1.getNameLength());
+        assertEquals(13, mdId2.getNameLength());
+        assertEquals(8, mdId3.getNameLength());
+        assertEquals(0, mdId4.getNameLength());
+    }
+
+    @Test
+    public void testEquals() {
+        //For char string
+        assertFalse(mdId1.equals(null));
+        assertFalse(mdId1.equals(new String("test")));
+
+        assertTrue(mdId1.equals(mdId1));
+        assertFalse(mdId1.equals(mdId2));
+
+        //For DomainName
+        assertFalse(mdId2.equals(null));
+        assertFalse(mdId2.equals(new String("test")));
+
+        assertTrue(mdId2.equals(mdId2));
+        assertFalse(mdId2.equals(mdId1));
+
+        //For MacUint
+        assertFalse(mdId3.equals(null));
+        assertFalse(mdId3.equals(new String("test")));
+
+        assertTrue(mdId3.equals(mdId3));
+        assertFalse(mdId3.equals(mdId1));
+
+        //For None
+        assertFalse(mdId4.equals(null));
+        assertFalse(mdId4.equals(new String("test")));
+
+        assertTrue(mdId4.equals(mdId4));
+        assertFalse(mdId4.equals(mdId1));
+
+    }
+
+    @Test
+    public void testHashCode() {
+        assertEquals(mdId1.hashCode(), mdId1.hashCode());
+        assertEquals(mdId2.hashCode(), mdId2.hashCode());
+        assertEquals(mdId3.hashCode(), mdId3.hashCode());
+        assertEquals(mdId4.hashCode(), mdId4.hashCode());
+    }
+}