JUnit测试FacesContext.GetExternalContext

Question

我在Java EE托管bean中有以下代码：

FacesContext context = facesContextProvider.getCurrentInstance();
HttpServletResponse response = (HttpServletResponse) context.getExternalContext();

其中facesContextProvider是一个用于返回faces上下文的自定义类（对于模拟测试很有用）。

我想知道如何使用Mockito在JUnit中测试这一点。我正在尝试以下方法的组合：

FacesContextProvider mockFacesContextProvider = mock(FacesContextProvider.class);
when(mockFacesContextProvider.getCurrentInstance()).thenReturn(mockFacesContext);
// this line is wrong ~> when(mockFacesContext.getExternalContext()).thenReturn((ExternalContext) new MockHttpServletResponse());

FacesContext facesContext = facesContextProvider.getCurrentInstance();
ExternalContext externalContext = facesContext.getExternalContext();
externalContext.responseReset();

HttpResponse response = externalContext.getResponse();

那么单元测试工具将是：

mockFacesContextProvider = mock(FacesContextProvider.class);
mockFacesContext = mock(FacesContext.class);
mockExternalContext = mock(ExternalContext.class);
mockHttpSession = mock(HttpSession.class);
when(mockFacesContextProvider.getCurrentInstance()).thenReturn(mockFacesContext);
when(mockFacesContext.getExternalContext()).thenReturn(mockExternalContext);
when(mockExternalContext.getSession(true)).thenReturn(mockHttpSession);

然后单元测试代码将是：

verify(mockExternalContext).responseReset();

Answer 1

FacesContextProvider mockFacesContextProvider = mock(FacesContextProvider.class);
HttpServletResponse mockResponse = mock(HttpServletResponse.class);
when(mockFacesContextProvider.getCurrentInstance()).thenReturn(mockFacesContext);
when(mockFacesContext.getExternalContext()).thenReturn(mockResponse);