def test_auto_codes(): """Make sure colors change when toggled.""" codes = colorclass._AutoCodes() key = '{autoblack}{autored}{autogreen}{autoyellow}{autoblue}{automagenta}{autocyan}{autowhite}' colorclass.set_light_background() assert '3031323334353637' == key.format(**codes) colorclass.set_dark_background() assert '9091929394959697' == key.format(**codes) assert len(colorclass._BASE_CODES) == len(codes)