function test_profile_invalid_user()
    {
        $params = array(
            'users',
            'profile',
            'no_such_user++');

        $usr = new ctrl_users();
        $usr->params = $params;

        try
        {
            $usr->profile();
            $this->fail();
        }
        catch(exception $e)
        {
            $this->assertEquals(preg_match("/users/", $e->getMessage()), 1);
        }

    // After redirect, should display error
        $usr->index();
        $result = $usr->display_outer(true);
        $this->assertEquals(preg_match("/The specified user does not exist/", $result), 1);
    }
    function test_following_invalid_user()
    {
        $rel = new ctrl_relations();
        $rel->params = array('relations', 'followers', 'unknows++');

        $rmt_mck = new mck_mdl_remotes('sue', 'Big fat human');

        try
        {
            $rel->following($rmt_mck);
            $this->fail();
        }
        catch(exception $e)
        {
            $this->assertEquals(preg_match("/users/", $e->getMessage()), 1);
        }

    // After redirect, should display error
        $usr = new ctrl_users();
        $usr->index();
        $result = $usr->display_outer(true);
        $this->assertEquals(preg_match("/The specified user does not exist/", $result), 1);
    }