@Before
 public void setup() {
   gateway.setRequestChannel(requestChannel);
   gateway.setReplyChannel(replyChannel);
   gateway.setBeanFactory(mock(BeanFactory.class));
   when(context.getResponse()).thenReturn(response);
   when(response.getPayloadResult()).thenReturn(payloadResult);
   when(context.getRequest()).thenReturn(request);
 }