Method test_missing_value_filling

xarray/tests/test_units.py:2777–2791

(self, func, dtype)

    @pytest.mark.xfail(reason="ffill and bfill lose units in data")
    @pytest.mark.parametrize("func", (method("ffill"), method("bfill")), ids=repr)
    def test_missing_value_filling(self, func, dtype):
        array = (
            create_nan_array([1.4, np.nan, 2.3, np.nan, np.nan, 9.1], dtype)
            * unit_registry.degK
        )
        x = np.arange(len(array))
        data_array = xr.DataArray(data=array, coords={"x": x}, dims="x")

        expected = attach_units(
            func(strip_units(data_array), dim="x"), extract_units(data_array)
        )
        actual = func(data_array, dim="x")

        assert_units_equal(expected, actual)
        assert_identical(expected, actual)

    @pytest.mark.parametrize(
        "unit,error",