'Tests that instance value managers are isolated from other instances'

def test_value_managers_are_keeping_model_instances_isolated(self):

    class Stuff(Model, ):
        id = columns.UUID(primary_key=True, default=(lambda : uuid4()))
        num = columns.Integer()
    inst1 = Stuff(num=5)
    inst2 = Stuff(num=7)
    self.assertNotEqual(inst1.num, inst2.num)
    self.assertEqual(inst1.num, 5)
    self.assertEqual(inst2.num, 7)
