@Test
 public void testNodeConnector() {
   NodeConnectorRef mockedNodeConnectorRef = mock(NodeConnectorRef.class);
   deviceContext.storeNodeConnectorRef(DUMMY_PORT_NUMBER, mockedNodeConnectorRef);
   final NodeConnectorRef nodeConnectorRef =
       deviceContext.lookupNodeConnectorRef(DUMMY_PORT_NUMBER);
   assertEquals(mockedNodeConnectorRef, nodeConnectorRef);
 }