def test_view_retains_ndarray_subclass():
    adata = ad.AnnData(np.zeros((10, 10)))
    adata.obsm["foo"] = np.zeros((10, 5)).view(NDArraySubclass)

    view = adata[:5, :]

    assert isinstance(view.obsm["foo"], NDArraySubclass)
    assert view.obsm["foo"].shape == (5, 5)
def _try_write_with_flush(cls, fileobj, payload):
        """This method is here so that it can be patched to simulate write errors.

        This is because mock can't patch primitive objects like file objects.
        """
        fileobj.write(payload)
        fileobj.flush()