### Question:
FacesResponseCompleteReturnValueHandler implements HandlerMethodReturnValueHandler { public boolean supportsReturnType(MethodParameter returnType) { return this.handler.supportsReturnType(returnType); } FacesResponseCompleteReturnValueHandler(HandlerMethodReturnValueHandler handler); boolean supportsReturnType(MethodParameter returnType); void handleReturnValue(Object returnValue, MethodParameter returnType, ModelAndViewContainer mavContainer,
			NativeWebRequest webRequest);  }### Answer:
@Test public void shouldDelegateSupports() throws Exception { this.handler.supportsReturnType(this.returnType); verify(this.delegate).supportsReturnType(this.returnType); verifyZeroInteractions(this.facesContext); }