Method test_dataset_math_errors

xarray/tests/test_dataset.py:6730–6747

(self)

        assert_identical(expected, actual)

    def test_dataset_math_errors(self) -> None:
        ds = self.make_example_math_dataset()

        with pytest.raises(TypeError):
            ds["foo"] += ds
        with pytest.raises(TypeError):
            ds["foo"].variable += ds
        with pytest.raises(ValueError, match=r"must have the same"):
            ds += ds[["bar"]]

        # verify we can rollback in-place operations if something goes wrong
        # nb. inplace datetime64 math actually will work with an integer array
        # but not floats thanks to numpy's inconsistent handling
        other = DataArray(np.datetime64("2000-01-01"), coords={"c": 2})
        actual = ds.copy(deep=True)
        with pytest.raises(TypeError):
            actual += other
        assert_identical(actual, ds)

    def test_dataset_transpose(self) -> None:
        ds = Dataset(