tawasuyu/taffy

1#[test]
2fn aspect_ratio_flex_column_fill_max_width() {
3    use slotmap::Key;
4    #[allow(unused_imports)]
5    use taffy::{layout::Layout, prelude::*};
6    let mut taffy = taffy::Taffy::new();
7    let node0 = taffy
8        .new_leaf_with_measure(
9            taffy::style::Style {
10                max_size: taffy::geometry::Size { width: auto(), height: taffy::style::Dimension::Points(20f32) },
11                aspect_ratio: Some(2f32),
12                ..Default::default()
13            },
14            taffy::node::MeasureFunc::Raw(|known_dimensions, available_space| {
15                const TEXT: &str = "HH\u{200b}HH\u{200b}HH\u{200b}HH";
16                super::measure_standard_text(
17                    known_dimensions,
18                    available_space,
19                    TEXT,
20                    super::WritingMode::Horizontal,
21                    Some(2f32),
22                )
23            }),
24        )
25        .unwrap();
26    let node = taffy
27        .new_with_children(
28            taffy::style::Style {
29                display: taffy::style::Display::Flex,
30                flex_direction: taffy::style::FlexDirection::Column,
31                align_items: Some(taffy::style::AlignItems::Start),
32                size: taffy::geometry::Size {
33                    width: taffy::style::Dimension::Points(100f32),
34                    height: taffy::style::Dimension::Points(100f32),
35                },
36                ..Default::default()
37            },
38            &[node0],
39        )
40        .unwrap();
41    taffy.compute_layout(node, taffy::geometry::Size::MAX_CONTENT).unwrap();
42    println!("\nComputed tree:");
43    taffy::debug::print_tree(&taffy, node);
44    println!();
45    let Layout { size, location, .. } = taffy.layout(node).unwrap();
46    assert_eq!(size.width, 100f32, "width of node {:?}. Expected {}. Actual {}", node.data(), 100f32, size.width);
47    assert_eq!(size.height, 100f32, "height of node {:?}. Expected {}. Actual {}", node.data(), 100f32, size.height);
48    assert_eq!(location.x, 0f32, "x of node {:?}. Expected {}. Actual {}", node.data(), 0f32, location.x);
49    assert_eq!(location.y, 0f32, "y of node {:?}. Expected {}. Actual {}", node.data(), 0f32, location.y);
50    let Layout { size, location, .. } = taffy.layout(node0).unwrap();
51    assert_eq!(size.width, 40f32, "width of node {:?}. Expected {}. Actual {}", node0.data(), 40f32, size.width);
52    assert_eq!(size.height, 20f32, "height of node {:?}. Expected {}. Actual {}", node0.data(), 20f32, size.height);
53    assert_eq!(location.x, 0f32, "x of node {:?}. Expected {}. Actual {}", node0.data(), 0f32, location.x);
54    assert_eq!(location.y, 0f32, "y of node {:?}. Expected {}. Actual {}", node0.data(), 0f32, location.y);
55}