public void testAuthenticateKnownUserWithExpiredCertificateYieldsNull() {

        X509Certificate[] certificateChain = createExpiredCertificateChain("bob");

        PublicKey publickey = certificateChain[0].getPublicKey();



        when(m_servletRequest.getAttribute(ATTRIBUTE_X509_CERTIFICATE)).thenReturn(certificateChain);



        User user = mock(User.class);

        when(user.getName()).thenReturn("bob");

        when(user.hasCredential(eq("publickey"), eq(publickey.getEncoded()))).thenReturn(Boolean.TRUE);



        when(m_userAdmin.getUser(eq("username"), eq("bob"))).thenReturn(user);



        User result = createAuthorizationProcessor().authenticate(m_userAdmin, m_servletRequest);

        assert result == null : "Did not expect a valid user to be returned!";

    }