### Question:
DummyGatewayManagerImpl implements GatewayManager { public String getMessageStatus(GatewayResponse response) { return "004"; }  Set<GatewayResponse> sendMessage(GatewayRequest messageDetails); void setSleepTime(long sleepTime); long getSleepTime(); String getMessageStatus(GatewayResponse response); MStatus mapMessageStatus(GatewayResponse response); GatewayMessageHandler getMessageHandler(); void setMessageHandler(GatewayMessageHandler messageHandler); boolean isThrowRandomExceptions(); void setThrowRandomExceptions(boolean throwRandomExceptions); ArrayList<Integer> getExceptionPoints(); void setExceptionPoints(ArrayList<Integer> exceptionPoints); int getExceptionPointRange(); void setExceptionPointRange(int exceptionPointRange);  }### Answer:
@Test public void testGetMessageStatus() { System.out.println("getMessageStatus"); GatewayResponseImpl response = new GatewayResponseImpl(); response.setGatewayMessageId("testId"); String result = instance.getMessageStatus(response); assertNotNull(result); }