test_disambigutors.py 文件源码

def test_edge_errors():
    """Edge input cases cause errors."""
    @attr.s
    class A(object):
        pass

    with pytest.raises(ValueError):
        # Can't generate for only one class.
        create_uniq_field_dis_func(A)

    @attr.s
    class B(object):
        pass

    with pytest.raises(ValueError):
        # No fields on either class.
        create_uniq_field_dis_func(A, B)

    @attr.s
    class C(object):
        a = attr.ib()

    @attr.s
    class D(object):
        a = attr.ib()

    with pytest.raises(ValueError):
        # No unique fields on either class.
        create_uniq_field_dis_func(C, D)