Method test_is_null

xarray/tests/test_dataarray.py:2522–2528

(self)

        assert isinstance(converted_subok.data, NdArraySubclass)

    def test_is_null(self) -> None:
        x = np.random.default_rng(42).random((5, 6))
        x[x < 0] = np.nan
        original = DataArray(x, [-np.arange(5), np.arange(6)], ["x", "y"])
        expected = DataArray(pd.isnull(x), [-np.arange(5), np.arange(6)], ["x", "y"])
        assert_identical(expected, original.isnull())
        assert_identical(~expected, original.notnull())

    def test_math(self) -> None:
        x = self.x