ServletRequest filter 测试用例

Question

我有一个过滤器，看起来像这样：

@Override
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
    // Get the servlet request
    HttpServletRequest req = (HttpServletRequest) request;
    ... Some logic code here ...
    if (!accepted.contains(req.getRequestURI())) {
        HttpServletResponse res = (HttpServletResponse) response;
        res.sendError(404, "Some Error");
        return;
    }
    // Pass the request along the filter chain
    chain.doFilter(request, response);
}

问题出在我的测试用例上。通常我会使用 mockito 来模拟HttpServletRequest这样的东西：

HttpServletRequest request = mock(HttpServletRequest.class);
when(request.getRequestURI()).thenReturn("the test URI");

但是，HttpServletRequest是通过强制转换在方法内部获得的，我不确定测试各种 URI 请求的最佳方法。

Answer 1

你应该仍然可以使用 doFilter 调用你的 servlet，如下所示：

HttpServletRequest request = mock(HttpServletRequest.class);
when(request.getRequestURI()).thenReturn("the test URI");
HttpServletResponse response = mock(HttpServletResponse.class);
//mock method calls on response, replay
myServlet.filter(request, response);

即使它在内部进行类型转换也没关系。