quinjet 0.0.37

A fast, live, keyboard-first Git source-control interface for the terminal
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use super::*;

#[test]
fn explicit_appearance_does_not_depend_on_the_system() {
    assert_eq!(AppearanceChoice::Light.resolve(), Appearance::Light);
    assert_eq!(AppearanceChoice::Dark.resolve(), Appearance::Dark);
}

#[test]
fn unavailable_or_unspecified_system_appearance_falls_back_to_dark() {
    assert_eq!(system_appearance(None), Appearance::Dark);
    assert_eq!(
        system_appearance(Some(dark_light::Mode::Unspecified)),
        Appearance::Dark
    );
}

#[test]
fn system_appearance_maps_light_and_dark() {
    assert_eq!(
        system_appearance(Some(dark_light::Mode::Light)),
        Appearance::Light
    );
    assert_eq!(
        system_appearance(Some(dark_light::Mode::Dark)),
        Appearance::Dark
    );
}

#[test]
fn every_theme_has_distinct_light_and_dark_surfaces() {
    for name in ThemeName::ALL {
        let light = Theme::new(name, Appearance::Light);
        let dark = Theme::new(name, Appearance::Dark);
        assert_ne!(light.background, dark.background, "{name:?}");
        assert_ne!(light.text, dark.text, "{name:?}");
        assert_ne!(light.selected, dark.selected, "{name:?}");
    }
}

#[test]
fn github_dark_uses_the_official_black_surfaces() {
    let theme = Theme::new(ThemeName::Github, Appearance::Dark);

    assert_eq!(theme.background, color(0x0d1117));
    assert_eq!(theme.panel, color(0x010409));
    assert_eq!(theme.panel_alt, color(0x161b22));
}

#[test]
fn every_theme_keeps_text_and_graphics_readable_on_every_surface() {
    for name in ThemeName::ALL {
        for appearance in [Appearance::Light, Appearance::Dark] {
            let theme = Theme::new(name, appearance);
            let surfaces = [
                theme.background,
                theme.panel,
                theme.panel_alt,
                theme.accent_soft,
                theme.selected,
                theme.added_background,
                theme.added_emphasis_background,
                theme.removed_background,
                theme.removed_emphasis_background,
            ];
            let foregrounds = [
                theme.text,
                theme.muted,
                theme.accent,
                theme.added,
                theme.removed,
                theme.modified,
                theme.conflict,
                theme.error,
                theme.success,
            ];
            for foreground in foregrounds.into_iter().chain(theme.syntax) {
                for background in surfaces {
                    assert!(
                        contrast(foreground, background) >= 4.5,
                        "{name:?} {appearance:?}: {foreground:?} on {background:?}"
                    );
                }
            }
            for background in surfaces {
                assert!(
                    contrast(theme.border, background) >= 3.0,
                    "{name:?} {appearance:?}: border on {background:?}"
                );
                assert!(
                    contrast(theme.border_focus, background) >= 3.0,
                    "{name:?} {appearance:?}: focus border on {background:?}"
                );
            }
            assert!(
                contrast(theme.selected, theme.background) >= 1.2,
                "{name:?} {appearance:?}: selection against background"
            );
            assert!(
                contrast(theme.selected, theme.panel) >= 1.2,
                "{name:?} {appearance:?}: selection against panel"
            );
            assert!(
                contrast(theme.selected, theme.panel_alt) >= 1.2,
                "{name:?} {appearance:?}: selection against alternate panel"
            );
            assert!(
                contrast(theme.text, theme.background) >= contrast(theme.muted, theme.background),
                "{name:?} {appearance:?}: muted text outranks primary text"
            );
            for semantic in [
                theme.accent,
                theme.added,
                theme.removed,
                theme.modified,
                theme.conflict,
            ] {
                assert!(
                    channel_span(semantic) >= 8,
                    "{name:?} {appearance:?}: semantic hue collapsed to {semantic:?}"
                );
            }
        }
    }
}

fn channel_span(color: Color) -> u8 {
    let Color::Rgb(red, green, blue) = color else {
        return 0;
    };
    red.max(green).max(blue) - red.min(green).min(blue)
}