test_structure_attrs.py 文件源码

def test_structure_union(converter, cl_and_vals_a, cl_and_vals_b):
    """Structuring of automatically-disambiguable unions works."""
    # type: (Converter, Any, Any) -> None
    cl_a, vals_a = cl_and_vals_a
    cl_b, vals_b = cl_and_vals_b
    a_field_names = {a.name for a in fields(cl_a)}
    b_field_names = {a.name for a in fields(cl_b)}
    assume(a_field_names)
    assume(b_field_names)

    common_names = a_field_names & b_field_names
    if len(a_field_names) > len(common_names):
        obj = cl_a(*vals_a)
        dumped = asdict(obj)
        res = converter.structure(dumped, Union[cl_a, cl_b])
        assert isinstance(res, cl_a)
        assert obj == res