name = 'Jhon'; $object->age = 21; expect($object)->toHaveProperties(['name', 'age']); }); test('failures', function () { $object = new stdClass(); $object->name = 'Jhon'; expect($object)->toHaveProperties(['name', 'age']); })->throws(ExpectationFailedException::class); test('not failures', function () { $object = new stdClass(); $object->name = 'Jhon'; $object->age = 21; expect($object)->not->toHaveProperties(['name', 'age']); })->throws(ExpectationFailedException::class);