How can i test the doFilter method?

Question

I try to test this method:

public void doFilter(final ServletRequest request, final ServletResponse response,
    final FilterChain chain) throws IOException, ServletException {

    final HttpServletRequest httpRequest = (HttpServletRequest) request;
    final HttpServletResponse httpResponse = (HttpServletResponse) response;

    if (httpRequest.getSession(true).getAttribute("connected") == null) {
        httpResponse.sendRedirect(request.getServletContext().getContextPath() + "/");
    } else {
        chain.doFilter(request, response);
    }
}

Here my test:

@Test
public void testDoFilter() throws IOException, ServletException {

    MockServletContext servletContext = new MockServletContext();
    MockHttpServletRequest request = new MockHttpServletRequest(servletContext);
    MockHttpServletResponse response = new MockHttpServletResponse();
    MockHttpSession session = new MockHttpSession();
    FilterChain chain = Mockito.mock(FilterChain.class);
    String url = "/private/";
    request.setContextPath("/private/");

    UserFilter userfilter = new UserFilter();
    userfilter.doFilter(request, response, chain);
    Mockito.verify(chain, Mockito.times(0)).doFilter(request, response);
    request.setSession(session);
    request.getSession().setAttribute("connected", "toto");
    Mockito.verify(chain, Mockito.times(1)).doFilter(request, response);
}

but the last Mockito.verify don't run. I don't also understand when I do

request.getAttribute("connected")

I obtain "toto" but null when I do

request.getSession(true).getAttribute("connected").

Can you explain and help me please? Thanks

Answer 1

The last Mockito.verify(chain, Mockito.times(1)).doFilter(request, response); fails because, request's session contains the key/value "connected" , so doFilter didn't called.

What about request.getAttribute("connected") vs request.getSession(true).getAttribute("connected") , I got null for the first, and toto for the second.