Method test_nbytes_does_not_load_data

xarray/tests/test_dataarray.py:3871–3884

(self)

        np.testing.assert_equal(actual_coords, expected_coords)

    def test_nbytes_does_not_load_data(self) -> None:
        array = InaccessibleArray(np.zeros((3, 3), dtype="uint8"))
        da = xr.DataArray(array, dims=["x", "y"])

        # If xarray tries to instantiate the InaccessibleArray to compute
        # nbytes, the following will raise an error.
        # However, it should still be able to accurately give us information
        # about the number of bytes from the metadata
        assert da.nbytes == 9
        # Here we confirm that this does not depend on array having the
        # nbytes property, since it isn't really required by the array
        # interface. nbytes is more a property of arrays that have been
        # cast to numpy arrays.
        assert not hasattr(array, "nbytes")

    def test_to_and_from_empty_series(self) -> None:
        # GH697