function test_logout()
    {
        $_SESSION['active_user'] = array('name' => 'fred', 'id' => 1);

        $usr = new ctrl_users();

        try
        {
            $usr->logout();

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

        $this->assertEquals($_SESSION, array());
    }