Method test_expand_dims_error

xarray/tests/test_dataarray.py:2184–2228

(self)

            assert actual.xindexes[dim_name].equals(expected.xindexes[dim_name])

    def test_expand_dims_error(self) -> None:
        array = DataArray(
            np.random.randn(3, 4),
            dims=["x", "dim_0"],
            coords={"x": np.linspace(0.0, 1.0, 3)},
            attrs={"key": "entry"},
        )

        with pytest.raises(TypeError, match=r"dim should be Hashable or"):
            array.expand_dims(0)
        with pytest.raises(ValueError, match=r"lengths of dim and axis"):
            # dims and axis argument should be the same length
            array.expand_dims(dim=["a", "b"], axis=[1, 2, 3])
        with pytest.raises(ValueError, match=r"Dimension x already"):
            # Should not pass the already existing dimension.
            array.expand_dims(dim=["x"])
        # raise if duplicate
        with pytest.raises(ValueError, match=r"duplicate values"):
            array.expand_dims(dim=["y", "y"])
        with pytest.raises(ValueError, match=r"duplicate values"):
            array.expand_dims(dim=["y", "z"], axis=[1, 1])
        with pytest.raises(ValueError, match=r"duplicate values"):
            array.expand_dims(dim=["y", "z"], axis=[2, -2])

        # out of bounds error, axis must be in [-4, 3]
        with pytest.raises(IndexError):
            array.expand_dims(dim=["y", "z"], axis=[2, 4])
        with pytest.raises(IndexError):
            array.expand_dims(dim=["y", "z"], axis=[2, -5])
        # Does not raise an IndexError
        array.expand_dims(dim=["y", "z"], axis=[2, -4])
        array.expand_dims(dim=["y", "z"], axis=[2, 3])

        array = DataArray(
            np.random.randn(3, 4),
            dims=["x", "dim_0"],
            coords={"x": np.linspace(0.0, 1.0, 3)},
            attrs={"key": "entry"},
        )
        with pytest.raises(TypeError):
            array.expand_dims({"new_dim": 3.2})

        # Attempt to use both dim and kwargs
        with pytest.raises(ValueError):
            array.expand_dims({"d": 4}, e=4)

    def test_expand_dims(self) -> None:
        array = DataArray(