'Tests that discriminator_column attribute is not inherited'

def test_discriminator_value_inheritance(self):

    class Base(models.Model, ):
        partition = columns.Integer(primary_key=True)
        type1 = columns.Integer(discriminator_column=True)
    class M1(Base, ):
        __discriminator_value__ = 1
    class M2(M1, ):
        pass
    assert (M2.__discriminator_value__ is None)
