Method test_append_with_mode_rplus_fails

xarray/tests/test_backends.py:3217–3225

(self)

                assert_identical(actual, modified)

    def test_append_with_mode_rplus_fails(self) -> None:
        original = Dataset({"foo": ("x", [1])})
        modified = Dataset({"bar": ("x", [2])})
        with self.create_zarr_target() as store:
            original.to_zarr(store, **self.version_kwargs)
            with pytest.raises(
                ValueError, match="dataset contains non-pre-existing variables"
            ):
                modified.to_zarr(store, mode="r+", **self.version_kwargs)

    def test_append_with_invalid_dim_raises(self) -> None:
        ds, ds_to_append, _ = create_append_test_data()