lernie 0.1.19

//! **The narrow shape** (bl-dfda): one column at a time, and the bar that names
//! the three.
//!
//! The defect these are written against is a picture — at 400x800 the three
//! columns stood side by side, each about 120 points wide, with every line in
//! every one of them wrapped to two or three words. The assertions are about
//! the layout rather than the pixels: what is on the glass, what is not, and
//! what one gesture on the bar changes.

use super::super::{Column, render};
use crate::paint_probe::frame::{Window, press};
use crate::test_support::window::{click, seated, wall};
use crate::ui::{Enrolling, Model, Pane, chat, composer, convs, roster};

/// A phone-shaped window: the size the ball named, and narrower than the width
/// at which the yield can still leave the conversation its floor.
fn phone() -> Window {
    Window::sized(400.0, 800.0)
}

/// **One column at a time, and the bar names all three.** The roster's rows are
/// not on the glass beside the conversation, which is the whole of the change:
/// they are one gesture away instead of 120 points wide.
#[test]
fn the_narrow_window_paints_one_column_and_a_bar_naming_the_three() {
    let mut model = seated();
    let shown = phone().text(|ctx| render(ctx, &mut model));
    for word in [roster::HEADING, convs::HEADING, chat::HEADING] {
        assert!(shown.contains(word), "the bar names {word:?}:\n{shown}");
    }
    assert!(
        shown.contains("port it"),
        "the conversation column is the one on the glass:\n{shown}"
    );
    assert!(
        !shown.contains(&roster::line(&wall("home"))),
        "and the roster is not beside it:\n{shown}"
    );
}

/// **The bar is the navigation**: one gesture from any column to any other.
#[test]
fn a_gesture_on_the_bar_brings_that_column_to_the_glass() {
    let mut model = seated();
    let window = phone();
    click(&window, roster::HEADING, |ctx| render(ctx, &mut model));
    assert_eq!(model.column, Column::Channels);
    let shown = window.text(|ctx| render(ctx, &mut model));
    assert!(
        shown.contains(&roster::line(&wall("home"))),
        "the channels column is on the glass:\n{shown}"
    );
    assert!(
        !shown.contains("port it"),
        "and the conversation is not:\n{shown}"
    );
}

/// **The composer stands down off the conversation's own column**, which is the
/// rule every covering pane already keeps read literally: the conversation it
/// deposits into is on the glass only when its column is.
#[test]
fn the_composer_stands_with_its_conversation_and_nowhere_else() {
    let mut model = seated();
    let window = phone();
    assert!(
        window
            .text(|ctx| render(ctx, &mut model))
            .contains(composer::SEND),
        "the box is under the conversation"
    );
    model.column = Column::Conversations;
    assert!(
        !window
            .text(|ctx| render(ctx, &mut model))
            .contains(composer::SEND),
        "and not under the list"
    );
}

/// **A covering pane stands the bar down too.** A pane that covers the window
/// is a modal, and a navigation control that changed a column nobody can see
/// would answer a click with nothing — the way out is the pane's own control,
/// which where the material is a secret is the one that forgets.
#[test]
fn a_covering_pane_takes_the_bar_with_the_columns_and_its_close_brings_it_back() {
    let aim = seated()
        .aim
        .unwrap_or_else(|| panic!("the fixture is aimed"));
    let mut model = Model {
        enroll: Some(Enrolling::at(aim)),
        ..seated()
    };
    let window = phone();
    let covered = window.text(|ctx| render(ctx, &mut model));
    assert!(
        covered.contains(crate::ui::enroll::HEADING),
        "the pane covers the window:\n{covered}"
    );
    assert!(
        !covered.contains(convs::HEADING),
        "and the bar is not standing under it:\n{covered}"
    );
    click(&window, crate::ui::enroll::CLOSE, |ctx| {
        render(ctx, &mut model);
    });
    let back = window.text(|ctx| render(ctx, &mut model));
    assert!(back.contains(convs::HEADING), "the bar is back:\n{back}");
}

/// **Left and right name a place, and in this shape the place is a column** —
/// and the arrows follow it, because the column on the glass is the only list
/// there is to walk.
#[test]
fn the_side_keys_step_the_column_and_the_arrows_follow_it() {
    let mut model = seated();
    let window = phone();
    for (key, column, arrows) in [
        (
            egui::Key::ArrowLeft,
            Column::Conversations,
            Pane::Conversations,
        ),
        (egui::Key::ArrowLeft, Column::Channels, Pane::Roster),
        (egui::Key::ArrowLeft, Column::Channels, Pane::Roster),
        (
            egui::Key::ArrowRight,
            Column::Conversations,
            Pane::Conversations,
        ),
    ] {
        window.frame(vec![press(key)], |ctx| render(ctx, &mut model));
        assert_eq!(model.column, column, "after {key:?}");
        assert_eq!(model.focus, arrows, "the arrows are the column's");
    }
}

/// **A walk in the narrow shape moves the list that is on the glass**, whatever
/// a wider window last left the focus on. The seated fixture opens on the
/// conversation column, whose list is the conversations — so a step down
/// selects, and the chat pane behind it is the row it landed on.
#[test]
fn an_arrow_walks_the_column_on_the_glass_rather_than_the_focus_a_wider_window_left() {
    let mut model = Model {
        focus: Pane::Roster,
        column: Column::Conversations,
        conversation: None,
        ..seated()
    };
    phone().frame(vec![press(egui::Key::ArrowDown)], |ctx| {
        render(ctx, &mut model);
    });
    assert_eq!(model.focus, Pane::Conversations);
    assert_eq!(
        model.conversation,
        Some("20260830T051200Z-a1b2".to_owned()),
        "the walk landed in the list the column shows"
    );
}