[lang-ref] ( index_of_string_not_found ) ( python )

def test_index_of_string_not_found():
    # -1 / exceptionh
    text = 'abcdefghi abcdefghi'
    s    = 'DEF'

    # find: return -1
    assert text.find(s) == -1

    # index: raise
    with pytest.raises(ValueError):
        text.index(s)