Added unit tests; including guava-testlib.
diff --git a/net/api/pom.xml b/net/api/pom.xml
index f74d08e..79737d3 100644
--- a/net/api/pom.xml
+++ b/net/api/pom.xml
@@ -16,4 +16,11 @@
 
     <description>ONOS network control API</description>
 
+    <dependencies>
+        <dependency>
+            <groupId>com.google.guava</groupId>
+            <artifactId>guava-testlib</artifactId>
+        </dependency>
+    </dependencies>
+
 </project>