public function testSubjectDeniedInvalid()
{
$policy = Policy::instance()->hasUsername('ccornutt');
$policySet = PolicySet::instance()->add('policy1', $policy);
$subject = new Subject((object) ['username' => 'ccornutt']);
$en = new Enforcer($policySet);
$this->assertFalse($en->denies('policy1', $subject));
}