def METHOD_NAME(self) -> None:
    coords = Coordinates(coords={"x": [0, 1, 2]})
    coords.update({"y": ("y", [4, 5, 6])})
    assert "y" in coords
    assert "y" in coords.xindexes
    expected = DataArray([4, 5, 6], coords={"y": [4, 5, 6]}, name="y")
    assert_identical(coords["y"], expected)