def METHOD_NAME(self):
    self.assertEqual(Flags("  foo    , bar  ").items(), {"foo", "bar"})
    flags = Flags(
        "max-size:120:2,font-family:DIN next pro,font-spacing:2, priority:140"
    )
    self.assertEqual(
        flags.items(),
        {
            ("font-family", "DIN next pro"),
            ("priority", "140"),
            ("max-size", "120", "2"),
            ("font-spacing", "2"),
        },
    )
    self.assertEqual(
        Flags("font-family: segoeui").items(), {("font-family", "segoeui")}
    )