public function testIsGuest()
{
$user = new TUser(self::$mgr);
$user->setName('John');
$user->setIsGuest(false);
$user->setRoles('Administrator, Writer');
self::assertFalse($user->getIsGuest());
$user->setIsGuest(true);
self::assertTrue($user->getIsGuest());
self::assertEquals(array(), $user->getRoles());
}