//! `instances` 的断言：演示数据与窄窗退化。
use super::*;

use super::super::layout::{frame_metrics, measure_cap_px, PaneKit, WidthClass};

#[test]
fn demo_rows_overflow_the_visible_list() {
    // 列表列要能滚动：条目数必须让内容高过可视区（760 窗高 − 标题栏 48 − 页头 84 − 页边距）
    let visible = 760.0 - 48.0 - 84.0 - 2.0 * WidthClass::Expanded.gutter();
    let row_height = 44.0 + Space::X3.dp();
    let content = DEMO.len() as f32 * row_height;
    assert!(
        content > visible,
        "列表内容 {content} 不比可视区 {visible} 高，截图里看不到独立滚动条"
    );
}

#[test]
fn every_demo_entry_has_name_version_and_loader() {
    for entry in &DEMO {
        assert!(!entry.name.is_empty());
        assert!(!entry.version.is_empty());
        assert!(!entry.loader.is_empty());
    }
    assert!(SELECTED < DEMO.len());
}

#[test]
fn detail_paragraph_is_long_enough_to_wrap() {
    // 行宽上限 ≈ 72 字符/行；写够几行才看得出断行位置
    assert!(NOTE.len() > 200, "正文档太短，看不出行宽上限");
}

#[test]
fn narrow_widths_switch_the_page_to_one_column() {
    // 1180 / 900 → 两列；700 → 单列（整页切换）
    assert_eq!(
        frame_metrics(PaneKit::ListDetail, 1180.0).layout,
        PageLayout::ListDetail
    );
    assert_eq!(
        frame_metrics(PaneKit::ListDetail, 700.0).layout,
        PageLayout::SingleColumn
    );
    // 窄窗下详情不吃满窗口：正文列仍 ≤ 行宽上限
    let narrow = frame_metrics(PaneKit::ListDetail, 700.0);
    assert!(narrow.column <= measure_cap_px() + f32::EPSILON);
    assert!(narrow.secondary.is_none());
}