@Test
public void processRequestModulesState() throws Exception {

    String request =
            "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n" +
                    "<rpc xmlns=\"urn:ietf:params:xml:ns:netconf:base:1.0\" message-id=\"152026367257\">\n" +
                    "  <get>\n" +
                    "    <source>\n" +
                    "      <running />\n" +
                    "    </source>\n" +
                    "    <filter type=\"subtree\">\n" +
                    "      <modules-state xmlns=\"urn:ietf:params:xml:ns:yang:ietf-yang-library\">\n" +
                    "     </modules-state>\n" +
                    "    </filter>\n" +
                    "  </get>\n" +
                    "</rpc>\n";
    String response = ietfYangLibrary.processRequest(m_clientInfo, request);
    assertTrue(response.contains("modules-state"));
}