@Test
public void testConvertDuplicateCommentExceptionToXmlRpcFault()
	throws Exception {

	Mockito.doThrow(
		DuplicateCommentException.class
	).when(
		_commentManager
	).addComment(
		Mockito.anyLong(), Mockito.anyLong(), Mockito.anyString(),
		Mockito.anyLong(), Mockito.anyString(),
		Mockito.<ServiceContextFunction>any()
	);
	execute();
	verifyFault(
		PingbackMethodImpl.PINGBACK_ALREADY_REGISTERED,
		"Pingback is already registered: null");
}