test_file_io.py 文件源码

def test_unsupported_not_forwarded():
    class FakeFile(io.RawIOBase):
        def unsupported_attr(self):  # pragma: no cover
            pass

    async_file = trio.wrap_file(FakeFile())

    assert hasattr(async_file.wrapped, 'unsupported_attr')

    with pytest.raises(AttributeError):
        getattr(async_file, 'unsupported_attr')