def test_invalid_scalar_index(adata, index):
    # https://github.com/theislab/anndata/issues/619
    with pytest.raises(IndexError, match=r".*index.* out of range\."):
        _ = adata[index]
def test_ccode_functions():
    assert ccode(sin(x) ** cos(x)) == "pow(sin(x), cos(x))"