Java ServletRequest筛选器测试用例

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);
}

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

问题在于我的测试用例。通常我会使用mockito来模拟

HttpServletRequest

类似这样的内容：

@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);
}

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

---

然而，

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。

您仍然可以使用doFilter调用servlet，如：

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);

---

即使它内部进行类型转换也没问题。

不用担心，伙计。。这是常有的事。。除你之外，还有其他人在解决问题。