makeover-immediate 0.50.0

//! Tests for [`super`].

use super::*;
use crate::widget::{WidgetStyle, chart};
use makeover_layout::{Bar, Chart};

fn palette(well: Color32) -> Palette {
    Palette {
        page: Color32::from_rgb(1, 1, 1),
        raised: Color32::from_rgb(2, 2, 2),
        overlay: Color32::from_rgb(3, 3, 3),
        well,
        sunken: Color32::from_rgb(4, 4, 4),
        bevel_light: Color32::WHITE,
        bevel_dark: Color32::BLACK,
        elevation: Color32::from_black_alpha(46),
        content: Color32::from_rgb(5, 5, 5),
        content_secondary: Color32::from_rgb(55, 55, 55),
        content_muted: Color32::from_rgb(6, 6, 6),
        action: Color32::from_rgb(7, 7, 7),
        danger: Color32::from_rgb(8, 8, 8),
        success: Color32::from_rgb(9, 9, 9),
        warning: Color32::from_rgb(10, 10, 10),
        info: Color32::from_rgb(11, 11, 11),
        border: Color32::from_rgb(200, 200, 200),
        info_surface: Color32::from_rgb(201, 201, 201),
        success_surface: Color32::from_rgb(202, 202, 202),
        warning_surface: Color32::from_rgb(203, 203, 203),
        danger_surface: Color32::from_rgb(204, 204, 204),
        row_stripe: Color32::from_rgb(205, 205, 205),
        row_hover: Color32::from_rgb(206, 206, 206),
        row_rule: Color32::from_rgb(207, 207, 207),
        row_selected: Color32::from_rgb(208, 208, 208),
    }
}

/// The cast is egui's own shadow type carrying the theme's tone, which is
/// the whole of what this crate had to decide for it: unlike a bevel, egui
/// already knows how to paint one.
#[test]
fn a_unit_is_drawn_only_where_the_kind_is_a_quantity() {
    // egui-drawing has no harness here, so what is tested is the decision
    // that precedes it: which fields have a unit to draw at all. The kind
    // half comes from the description rather than from a `matches!` in this
    // crate, which is the drift `FieldKind::measurable` exists to stop.
    let ranged = makeover_layout::Field {
        unit: Some("s"),
        ..makeover_layout::Field::range("attack", "Attack", "0", "5")
    };
    assert_eq!(unit_of(&ranged), Some("s"));

    let typed = makeover_layout::Field {
        unit: Some("ms"),
        ..makeover_layout::Field::new(makeover_layout::FieldKind::Number, "fade", "Fade")
    };
    assert_eq!(unit_of(&typed), Some("ms"));

    let worded = makeover_layout::Field {
        unit: Some("s"),
        ..makeover_layout::Field::new(makeover_layout::FieldKind::Text, "name", "Name")
    };
    assert_eq!(unit_of(&worded), None);

    let bare = makeover_layout::Field::range("attack", "Attack", "0", "5");
    assert_eq!(unit_of(&bare), None);
}

#[test]
fn the_cast_hands_egui_the_themes_tone() {
    let p = palette(Color32::from_rgb(9, 9, 9));
    let cast = p.cast();
    assert_eq!(cast.color, p.elevation);
    assert!(cast.blur > 0, "a cast shadow is soft");
    assert_eq!(cast.offset, [0, 2], "it falls downward and only a little");
}

#[test]
fn a_well_resolves_to_its_own_token() {
    // No substitution left. The page-filled well was a stand-in for a
    // token that did not exist yet; it exists now.
    let w = Color32::from_rgb(9, 9, 9);
    let p = palette(w);
    assert_eq!(p.fill(Fill::Well), Some(w));
    assert_ne!(p.fill(Fill::Well), Some(p.page));
}

#[test]
fn every_intent_is_a_plain_lookup() {
    let p = palette(Color32::from_rgb(9, 9, 9));
    assert_eq!(p.fill(Fill::Page), Some(p.page));
    assert_eq!(p.fill(Fill::Raised), Some(p.raised));
    assert_eq!(p.fill(Fill::Overlay), Some(p.overlay));
}

/// Sunken is its own colour, not the well's and not the page's. The two
/// are authored in opposite directions and an earlier cut of the
/// description conflated them.
#[test]
fn sunken_is_neither_the_well_nor_the_page() {
    let p = palette(Color32::from_rgb(9, 9, 9));
    assert_eq!(p.fill(Fill::Sunken), Some(p.sunken));
    assert_ne!(p.fill(Fill::Sunken), p.fill(Fill::Well));
    assert_ne!(p.fill(Fill::Sunken), p.fill(Fill::Page));
}

#[test]
fn a_raised_region_never_resolves_to_the_well_fill() {
    // The cross-app bug, asserted at the renderer boundary this time.
    let p = palette(Color32::from_rgb(9, 9, 9));
    let raised = Depth::Raised.fill().and_then(|f| p.fill(f));
    let well = Depth::Well.fill().and_then(|f| p.fill(f));
    assert_eq!(raised, Some(p.raised));
    assert_ne!(raised, well);
}

#[test]
fn an_overlay_is_cast_onto_the_page_and_takes_no_edge() {
    // makeover-layout 0.14.0 is what made this reachable. The answer was
    // already here at 0.10.0 and the question could not be asked.
    let p = palette(Color32::from_rgb(9, 9, 9));
    assert_eq!(
        Depth::Overlay.fill().and_then(|f| p.fill(f)),
        Some(p.overlay)
    );
    assert_eq!(Depth::Overlay.bevel(), None);
    // The shadow `frame` reaches for is the theme's tone rather than
    // egui's default, which is the whole reason `cast` exists.
    assert_eq!(p.cast().color, p.elevation);
}

#[test]
fn the_lit_edge_swaps_when_a_card_is_pressed() {
    let p = palette(Color32::from_rgb(9, 9, 9));
    let (tl, _) = Depth::Raised.bevel().unwrap().edges();
    let (ptl, _) = Depth::Raised.pressed().bevel().unwrap().edges();
    assert_eq!(p.edge(tl), p.bevel_light);
    assert_eq!(p.edge(ptl), p.bevel_dark);
}

#[test]
fn flat_asks_for_neither_fill_nor_edge() {
    assert!(Depth::Flat.fill().is_none());
    assert!(Depth::Flat.bevel().is_none());
}

#[test]
fn a_select_keeps_a_value_none_of_its_options_carries() {
    // The save-the-wrong-thing bug, asserted at the second renderer so it
    // is not re-found there. goingson's own numbers.
    let options = [
        Choice::plain("1"),
        Choice::plain("3"),
        Choice::plain("7"),
        Choice::plain("14"),
    ];
    assert_eq!(shown_label(&options, "10"), "10");
    // And a value that does match reads as its label, not as itself.
    let spelled = [Choice::new("7", "One week")];
    assert_eq!(shown_label(&spelled, "7"), "One week");
}

#[test]
fn an_unanswered_chooser_reads_its_ghost_text_and_reads_it_muted() {
    let p = palette(Color32::from_rgb(9, 9, 9));
    let options = [Choice::new("sp404", "SP-404")];
    let field = Field {
        placeholder: Some("Select device..."),
        ..Field::select("device", "Conform for device", &options)
    };

    assert_eq!(
        chosen_text(&field, "", &p),
        ("Select device...", p.content_muted),
        "ghost text is not an answer, so it takes the tone the typed kinds' ghost text does"
    );

    // Answered, and it is the label that reads rather than the value.
    assert_eq!(chosen_text(&field, "sp404", &p), ("SP-404", p.content));
}

#[test]
fn a_wrong_answer_is_not_an_absent_one() {
    // The retention-10 bug and the ghost text meet here: a value no option
    // carries still reads as itself, because the field IS answered and the
    // answer is wrong. Only the empty value is unanswered.
    let p = palette(Color32::from_rgb(9, 9, 9));
    let options = [Choice::plain("1"), Choice::plain("7")];
    let field = Field {
        placeholder: Some("Pick one"),
        ..Field::select("retention", "Keep backups for", &options)
    };

    assert_eq!(chosen_text(&field, "10", &p), ("10", p.content));
}

#[test]
fn a_chooser_with_no_ghost_text_is_unchanged() {
    // The whole change is opt-in from the description. A field that says
    // nothing about its empty state still shows an empty box.
    let p = palette(Color32::from_rgb(9, 9, 9));
    let options = [Choice::plain("1")];
    let field = Field::select("retention", "Keep backups for", &options);
    assert_eq!(chosen_text(&field, "", &p), ("", p.content));
}

#[test]
fn a_range_is_slid_and_a_number_is_typed_into() {
    // The distinction the kind was added for, at the renderer that has to
    // act on it. A well with a figure in it is not a quiet slider.
    assert_eq!(control_shape(FieldKind::Range), Control::Slid);
    assert_eq!(control_shape(FieldKind::Number), Control::Typed);
}

#[test]
fn a_range_missing_an_end_falls_back_to_a_well() {
    // egui's `Slider` demands both ends, so inventing one would be this
    // renderer picking bounds the app never stated and the user then
    // dragging against them. A typed number takes every answer the slider
    // would.
    let whole = Field::range("review", "Review above", "0", "1");
    assert_eq!(shape_of(&whole), Control::Slid);

    let half = Field {
        max: Some("1"),
        ..Field::new(FieldKind::Range, "review", "Review above")
    };
    assert_eq!(shape_of(&half), Control::Typed);
    assert_eq!(extent(&half), None);

    // A bound this host cannot read is the same outcome by a different
    // route: the description carries bounds as text because the bound of a
    // date is a date.
    let dated = Field::range("when", "When", "2026-08-01", "2026-08-31");
    assert_eq!(extent(&dated), None);
}

#[test]
fn an_interval_is_its_own_shape_and_not_two_numbers() {
    // The distinction the kind was added for, at the renderer that has to
    // arrange it: two wells stacked are two questions on screen, whatever
    // the description says.
    assert_eq!(control_shape(FieldKind::Interval), Control::Spanned);
    assert_eq!(shape_of(&Field::interval("a", "b", "A")), Control::Spanned);

    // Unlike a range, it owes no extent: its bounds are a rule on each end
    // rather than the control, so a missing one is an open end.
    let axis = Field {
        min: Some("0"),
        max: Some("300"),
        ..Field::interval("bpm_min", "bpm_max", "BPM")
    };
    assert_eq!(shape_of(&axis), Control::Spanned);
}

#[test]
fn an_empty_end_reads_as_the_bound_it_stands_for() {
    // Which is what the shipped control did before it was described: an
    // unset minimum sits on the low edge and stores no filter. `DragValue`
    // has no empty state, and a text box instead would cost the app a
    // control on the way into being described.
    let axis = Axis {
        extent: Some(0.0..=300.0),
        step: Some("1"),
        unit: Some("BPM"),
    };
    assert!((axis.edge(Bound::Low) - 0.0).abs() < f64::EPSILON);
    assert!((axis.edge(Bound::High) - 300.0).abs() < f64::EPSILON);

    // With no extent there is no edge to sit on, and a drag box has to
    // start somewhere. The one number this renderer invents, invented where
    // the description declined to say anything.
    let open = Axis {
        extent: None,
        step: None,
        unit: None,
    };
    assert!((open.edge(Bound::Low) - 0.0).abs() < f64::EPSILON);
    assert!((open.edge(Bound::High) - 0.0).abs() < f64::EPSILON);
}

#[test]
fn the_step_decides_how_a_dragged_value_is_written_back() {
    // Without it a 0-to-1 threshold writes back whatever float the drag
    // landed on, which is the host's granularity and is what the
    // description says an absent step means.
    assert_eq!(decimals(None), None);
    assert_eq!(decimals(Some("1")), Some(0));
    assert_eq!(decimals(Some("0.01")), Some(2));
    // Trailing zeros are not precision: 0.10 is a one-decimal question.
    assert_eq!(decimals(Some("0.10")), Some(1));
}

#[test]
fn an_unavailable_option_is_drawn_muted_rather_than_dropped() {
    // The tone rule, at the one place it is a claim rather than a
    // preference: this option genuinely will not answer, so muted is the
    // truth. The available ones beside it keep the secondary intent.
    let p = palette(Color32::from_rgb(9, 9, 9));
    let options = [
        Choice::new("chromatic", "Chromatic"),
        Choice::new("multi", "Multi-sample").unless("Drop a second sample."),
    ];
    assert!(options[0].available());
    assert!(!options[1].available());
    assert_eq!(
        option_color("chromatic", options[0].value, &p),
        p.content,
        "the chosen option is the emphasised thing"
    );
    assert_eq!(
        option_color("chromatic", options[1].value, &p),
        p.content_secondary,
        "and `option_color` never mutes: the unavailable path is what does"
    );
}

#[test]
fn a_closed_chooser_carries_both_of_an_options_extra_lines_in_its_row() {
    // makeover-layout 0.39.0. The radio group has room for a second line
    // and this control does not, so the two draw the same description
    // differently and neither is a preference.
    let plain = Choice::new("24", "Small Files");
    assert_eq!(combo_row(&plain), "Small Files");

    let detailed = plain.detailing("$24/mo. Fits audio, plugins, binaries.");
    assert_eq!(
        combo_row(&detailed),
        "Small Files  $24/mo. Fits audio, plugins, binaries."
    );

    // What it is, then why it cannot be picked. An option carrying both has
    // said two things, and the order is the one the group draws.
    let both = detailed.unless("Sold out.");
    assert_eq!(
        combo_row(&both),
        "Small Files  $24/mo. Fits audio, plugins, binaries.  Sold out."
    );
    assert_eq!(
        combo_row(&plain.unless("Sold out.")),
        "Small Files  Sold out.",
        "the reason still reads the way it did before the detail existed"
    );
}

#[test]
fn only_a_required_field_is_marked() {
    let style = FieldStyle::default();
    let plain = Field::new(FieldKind::Text, "title", "Title");
    assert_eq!(label_text(&plain, &style), "Title");

    let required = Field {
        required: true,
        ..plain
    };
    assert_eq!(label_text(&required, &style), "Title *");

    // The marker is copy and the app owns it, which is why it is a knob.
    let house = FieldStyle {
        required_marker: "(required)",
        ..style
    };
    assert_eq!(label_text(&required, &house), "Title (required)");
}

#[test]
fn a_select_and_a_checkbox_are_pressed_and_everything_else_is_typed_into() {
    // What decides whether the control gets a well. A well is for what the
    // user looks into, and only one of these is.
    assert_eq!(control_shape(FieldKind::Select), Control::Chosen);
    // Not the wildcard. A theme picker falling to `Control::Typed` would
    // draw a text box over a resolved list, which is worse than the select
    // every app had before the member existed.
    assert_eq!(control_shape(FieldKind::Theme), Control::Themed);
    assert_eq!(control_shape(FieldKind::Radio), Control::Listed);
    assert_eq!(control_shape(FieldKind::Checkbox), Control::Toggled);
    for k in [
        FieldKind::Text,
        FieldKind::Secret,
        FieldKind::Number,
        FieldKind::Email,
        FieldKind::Url,
        FieldKind::Tel,
        FieldKind::Textarea,
        FieldKind::Rich,
    ] {
        assert_eq!(control_shape(k), Control::Typed, "{k:?} is typed into");
    }
    // And the two multi-line ones get a multi-line edit, which is the half
    // `control_shape` alone does not say: both are typed into, and only one
    // of the two edit shapes can hold a markdown document.
    assert!(FieldKind::Rich.multiline());
    assert!(FieldKind::Textarea.multiline());
    assert!(!FieldKind::Text.multiline());
}

#[test]
fn the_two_option_taking_kinds_are_drawn_differently_on_purpose() {
    // The description holds Select and Radio apart, and a renderer that
    // collapsed them would silently answer a question the app did not ask:
    // audiofiles' storage style is irreversible and its alternatives have
    // to be readable without opening anything. Asserting the two shapes
    // differ is asserting that distinction survives the trip.
    assert!(FieldKind::Select.offers_options());
    assert!(FieldKind::Radio.offers_options());
    assert_ne!(
        control_shape(FieldKind::Select),
        control_shape(FieldKind::Radio)
    );
}

#[test]
fn an_unchosen_option_is_secondary_and_never_muted() {
    let p = palette(Color32::from_rgb(4, 4, 4));
    assert_eq!(option_color("wav", "wav", &p), p.content);
    assert_eq!(option_color("wav", "aiff", &p), p.content_secondary);
    // The whole point of the distinction: muted is what Disabled resolves
    // to, so an option wearing it would claim it does not answer a press.
    assert_ne!(option_color("wav", "aiff", &p), p.content_muted);
}

/// What the accessibility tree says a screen drew, as `(role, name)` pairs.
///
/// egui builds this from the same `WidgetInfo` every widget already reports,
/// so it is what a screen reader would be handed rather than a second
/// opinion about it. A name that arrives through `labelled_by` is resolved
/// the way a client resolves it: the relation names another node, and that
/// node's text is the control's accessible name.
fn announced(draw: impl FnMut(&mut egui::Ui)) -> Vec<(egui::accesskit::Role, String)> {
    let ctx = egui::Context::default();
    ctx.enable_accesskit();
    let mut draw = draw;
    let input = || egui::RawInput {
        screen_rect: Some(egui::Rect::from_min_size(
            egui::Pos2::ZERO,
            egui::vec2(800.0, 600.0),
        )),
        ..Default::default()
    };
    // Two passes: egui lays out against the previous frame, so the first
    // sees widgets at the wrong rect.
    let _ = ctx.run_ui(input(), &mut draw);
    let out = ctx.run_ui(input(), &mut draw);

    let update = out
        .platform_output
        .accesskit_update
        .expect("accesskit is on, so a tree was built");
    let by_id: std::collections::HashMap<_, _> = update.nodes.iter().cloned().collect();
    update
        .nodes
        .iter()
        .map(|(_, node)| {
            let named = node.label().map(str::to_owned).or_else(|| {
                node.labelled_by()
                    .iter()
                    .find_map(|id| by_id.get(id))
                    .and_then(|by| by.label().or_else(|| by.value()).map(str::to_owned))
            });
            (node.role(), named.unwrap_or_default())
        })
        .collect()
}

#[test]
fn a_fields_label_names_its_control_rather_than_sitting_beside_it() {
    let f = Field::new(FieldKind::Text, "name", "Vault name");
    let p = palette(Color32::from_rgb(9, 9, 9));
    let drawn = announced(|ui| {
        let mut text = String::new();
        field(
            ui,
            &f,
            Filling::Text(&mut text),
            None,
            &p,
            &FieldStyle::default(),
        );
    });

    let box_ = drawn
        .iter()
        .find(|(role, _)| *role == egui::accesskit::Role::TextInput)
        .expect("a text field draws a text input");
    assert_eq!(
        box_.1, "Vault name",
        "the box is announced by the question rather than unnamed: {drawn:?}"
    );
}

#[test]
fn a_prefilled_box_is_still_announced_by_its_question() {
    // The sharper half. With nothing attached, a box carrying a value is
    // announced as that value, so a rename field read out the name it was
    // seeded with and never said what was being asked.
    let f = Field::new(FieldKind::Text, "name", "New name");
    let p = palette(Color32::from_rgb(9, 9, 9));
    let drawn = announced(|ui| {
        let mut text = String::from("Drums");
        field(
            ui,
            &f,
            Filling::Text(&mut text),
            None,
            &p,
            &FieldStyle::default(),
        );
    });

    let box_ = drawn
        .iter()
        .find(|(role, _)| *role == egui::accesskit::Role::TextInput)
        .expect("a text field draws a text input");
    assert_eq!(box_.1, "New name", "{drawn:?}");
}

#[test]
fn both_ends_of_an_interval_are_named_by_the_one_question() {
    // A union response carries the first id, so labelling the pair outside
    // the arm named the lower box and left the upper one announced as
    // whatever number was in it.
    let f = Field::new(FieldKind::Interval, "bpm", "BPM Range");
    let p = palette(Color32::from_rgb(9, 9, 9));
    let drawn = announced(|ui| {
        let mut lower = String::from("90");
        let mut upper = String::from("300");
        field(
            ui,
            &f,
            Filling::Between {
                lower: &mut lower,
                upper: &mut upper,
            },
            None,
            &p,
            &FieldStyle::default(),
        );
    });

    // A `SpinButton`: an interval's ends are drag values, not text boxes.
    let ends: Vec<_> = drawn
        .iter()
        .filter(|(role, _)| *role == egui::accesskit::Role::SpinButton)
        .collect();
    assert_eq!(ends.len(), 2, "an interval draws two boxes: {drawn:?}");
    for end in ends {
        assert_eq!(end.1, "BPM Range", "{drawn:?}");
    }
}

#[test]
fn a_checkbox_keeps_naming_itself() {
    // `FieldKind::labels_itself` routes past the label, and egui names a
    // checkbox from its own text, so there is nothing to attach and
    // attaching one would say the name twice.
    let f = Field::new(FieldKind::Checkbox, "loop", "Loop playback");
    let p = palette(Color32::from_rgb(9, 9, 9));
    let drawn = announced(|ui| {
        let mut ticked = false;
        field(
            ui,
            &f,
            Filling::On(&mut ticked),
            None,
            &p,
            &FieldStyle::default(),
        );
    });

    assert!(
        drawn
            .iter()
            .any(|(role, name)| *role == egui::accesskit::Role::CheckBox
                && name == "Loop playback"),
        "{drawn:?}"
    );
}

#[test]
fn a_hidden_field_draws_nothing_and_answers_nothing() {
    // Where the two renderers legitimately part: a webview still emits an
    // input because the form submits, and there is no form here.
    let f = Field::new(FieldKind::Hidden, "id", "Id");
    let p = palette(Color32::from_rgb(9, 9, 9));
    egui::__run_test_ui(|ui| {
        let drawn = field(ui, &f, Filling::Absent, None, &p, &FieldStyle::default());
        assert!(drawn.is_none());
    });
}

#[test]
fn a_disabled_field_stops_answering_and_an_unstated_one_does_not() {
    let f = Field::new(FieldKind::Text, "title", "Title");
    let p = palette(Color32::from_rgb(9, 9, 9));
    let style = FieldStyle::default();
    egui::__run_test_ui(|ui| {
        let mut text = String::from("x");
        let disabled = field(
            ui,
            &f,
            Filling::Text(&mut text),
            Some(State::Disabled),
            &p,
            &style,
        )
        .unwrap();
        assert!(!disabled.enabled());

        // Stating no state is the ordinary case and answers. Focus used to
        // be the counter-example here; it is egui's now and a description
        // cannot state it at all.
        let mut text = String::from("x");
        let plain = field(ui, &f, Filling::Text(&mut text), None, &p, &style).unwrap();
        assert!(plain.enabled(), "an unstated field still answers");
    });
}

#[test]
fn a_field_described_one_way_and_filled_another_is_drawn_inert() {
    // No panic and no write-through. A checkbox handed a string cannot be
    // filled, so it is drawn off and left alone.
    let f = Field::new(FieldKind::Checkbox, "done", "Done");
    let p = palette(Color32::from_rgb(9, 9, 9));
    let mut text = String::from("untouched");
    egui::__run_test_ui(|ui| {
        let drawn = field(
            ui,
            &f,
            Filling::Text(&mut text),
            None,
            &p,
            &FieldStyle::default(),
        );
        assert!(drawn.is_some());
    });
    assert_eq!(text, "untouched");
}

#[test]
fn the_disclosure_belongs_to_the_form_and_not_to_the_field() {
    let fields = [
        Field::new(FieldKind::Text, "title", "Title"),
        Field {
            extended: true,
            ..Field::new(FieldKind::Text, "notes", "Notes")
        },
    ];
    let style = FieldStyle::default();

    let mut closed = Vec::new();
    egui::__run_test_ui(|ui| {
        group(ui, &fields, false, &style, |_, f| closed.push(f.name));
    });
    assert_eq!(closed, ["title"]);

    let mut open = Vec::new();
    egui::__run_test_ui(|ui| {
        group(ui, &fields, true, &style, |_, f| open.push(f.name));
    });
    assert_eq!(open, ["title", "notes"]);
}

#[test]
fn the_default_frame_is_square_and_one_point() {
    let d = FrameStyle::default();
    assert_eq!(d.radius, CornerRadius::ZERO);
    assert_eq!(d.margin, Margin::ZERO);
    assert!((d.stroke - 1.0).abs() < f32::EPSILON);
}

#[test]
fn a_theme_picker_reads_its_chosen_theme_by_name() {
    const THEMES: &[makeover_layout::ThemeChoice<'_>] = &[makeover_layout::ThemeChoice::new(
        "carbonfox",
        "Carbonfox",
        ThemeVariant::Dark,
        makeover_layout::Contrast::High,
    )];
    let field =
        Field::theme("theme", "Theme", THEMES).following(Choice::new("system", "Follow System"));

    assert_eq!(themed_text(&field, "carbonfox"), "Carbonfox");
    assert_eq!(themed_text(&field, "system"), "Follow System");
    // A stored id whose theme has been deleted reads as itself rather than
    // as an empty box, which is the honest report on the config as it
    // stands.
    assert_eq!(themed_text(&field, "gone"), "gone");
}

/// A chart paints one column per bar, each reaching its share of the figure's
/// height, and a bar of nothing still occupies the axis rather than vanishing.
///
/// Asserted through the painter's own shapes rather than through a screenshot:
/// what matters is that the heights are in proportion to the description, which
/// is the one thing this renderer could get wrong on its own.
#[test]
fn the_columns_reach_their_share_of_the_height() {
    let p = palette(Color32::from_rgb(9, 9, 9));
    let style = WidgetStyle::default();
    let chart_of = Chart::new(20);
    let bars = [
        Bar::at("Mar 3").of(20),
        Bar::at("Mar 4").of(10),
        Bar::at("Mar 5").of(0),
    ];
    egui::__run_test_ui(|ui| {
        chart(ui, &chart_of, &bars, &p, &style);
    });

    // The arithmetic the painting is driven by, checked where it is decided.
    // `fraction` is what both this renderer and `makeover-tui` divide with, so
    // pinning it here pins the drawing in both.
    assert!((bars[0].fraction(&chart_of) - 1.0).abs() < f32::EPSILON);
    assert!((bars[1].fraction(&chart_of) - 0.5).abs() < f32::EPSILON);
    assert!(bars[2].fraction(&chart_of).abs() < f32::EPSILON);
}

/// An axis of zero divides by nothing and paints nothing, rather than panicking
/// or filling every bar.
#[test]
fn an_empty_axis_paints_flat_bars() {
    let p = palette(Color32::from_rgb(9, 9, 9));
    let empty = Chart::new(0);
    let bars = [Bar::at("Mar 3").of(5)];
    egui::__run_test_ui(|ui| {
        chart(ui, &empty, &bars, &p, &WidgetStyle::default());
    });
    assert!(bars[0].fraction(&empty).abs() < f32::EPSILON);
}

#[test]
fn a_badge_fills_with_its_tone_surface_and_edges_in_its_tone() {
    // The webview's badge: a neutral one is raised inside the border, and a
    // status one is its tone surface inside its tone. The tone is never the
    // ink, so it is never asked for here.
    let p = palette(Color32::from_rgb(4, 4, 4));
    assert_eq!(p.tone_surface(Tone::Neutral), p.raised);
    assert_eq!(p.tone_edge(Tone::Neutral), p.border);
    for (tone, surface, edge) in [
        (Tone::Info, p.info_surface, p.info),
        (Tone::Success, p.success_surface, p.success),
        (Tone::Warning, p.warning_surface, p.warning),
        (Tone::Danger, p.danger_surface, p.danger),
    ] {
        assert_eq!(p.tone_surface(tone), surface, "{tone:?}");
        assert_eq!(p.tone_edge(tone), edge, "{tone:?}");
    }
}