Function theme_mode_display_and_parse

crates/openshell-tui/src/theme.rs:320–328

()

    #[test]
    fn theme_mode_display_and_parse() {
        for mode in [ThemeMode::Auto, ThemeMode::Dark, ThemeMode::Light] {
            let s = mode.to_string();
            let parsed: ThemeMode = s.parse().unwrap();
            assert_eq!(mode, parsed);
        }

        assert!("invalid".parse::<ThemeMode>().is_err());
    }
}