JUnit测试JSP响应

Question

将此代码用于servlet html响应：

@Override public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { RequestDispatcher dispatcher = request.getRequestDispatcher("/projects.jsp"); dispatcher.forward(request, response); }

方法工作正常并返回由projects.jsp构建的浏览器HTML。 现在我想测试这个HTML响应，但我可以得到一个JSP输出。

`

@Test
public void doGetTest() {
    HttpServletResponse response = Mockito.mock(HttpServletResponse.class);
    HttpServletRequest request = Mockito.mock(HttpServletRequest.class);
    RequestDispatcher requestDispatcher = Mockito.mock(RequestDispatcher.class);
    HttpSession session = Mockito.mock(HttpSession.class);

    StringWriter stringWriter = new StringWriter();
    PrintWriter printWriter = new PrintWriter(stringWriter);
    try {
        when(response.getWriter()).thenReturn(printWriter);
        when(request.getSession()).thenReturn(session);
        when(request.getRequestDispatcher("/projects.jsp")).thenReturn(requestDispatcher);
    } catch (IOException ex) {
        fail(ex.getMessage());
    }

    try {
        new Projects().doGet(request, response);
        verify(requestDispatcher).forward(request, response);
    } catch (ServletException | IOException ex) {
        fail(ex.getMessage());
    }

    printWriter.flush();

    System.err.println(stringWriter.getBuffer().toString().trim());
}

`

  

stringWriter.getBuffer（）。toString（）。trim（）

这里不返回HTML代码，只是空白字符串。我尝试过谷歌和这里，但我找不到JUnit和Java 8的工作示例（例如找到Selenium）。这个测试代码没有jsp的好工作（servlet通过response.getWriter（）。println（）写入响应。 请告诉我，在这种情况下如何获得JSP HTML响应？