public void testHeadersToSendToUser() throws Exception {
TestUser user = new TestUser();
Message<?> inputMessage = createInputMessage("sess1", "sub1", "/app", "/dest", user);
SimpMessageSendingOperations messagingTemplate = Mockito.mock(SimpMessageSendingOperations.class);
SendToMethodReturnValueHandler handler = new SendToMethodReturnValueHandler(messagingTemplate, false);
handler.handleReturnValue(PAYLOAD, this.sendToUserDefaultDestReturnType, inputMessage);
verify(messagingTemplate).convertAndSendToUser(eq("joe"), eq("/queue/dest"), eq(PAYLOAD));