tawasuyu/taffy

1#[test]
2fn grid_aspect_ratio_child_fill_content_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 { aspect_ratio: Some(2f32), ..Default::default() },
10            taffy::node::MeasureFunc::Raw(|known_dimensions, available_space| {
11                const TEXT: &str = "HHHH";
12                super::measure_standard_text(
13                    known_dimensions,
14                    available_space,
15                    TEXT,
16                    super::WritingMode::Horizontal,
17                    Some(2f32),
18                )
19            }),
20        )
21        .unwrap();
22    let node1 = taffy
23        .new_leaf(taffy::style::Style {
24            size: taffy::geometry::Size { width: auto(), height: taffy::style::Dimension::Points(20f32) },
25            ..Default::default()
26        })
27        .unwrap();
28    let node = taffy
29        .new_with_children(
30            taffy::style::Style { display: taffy::style::Display::Grid, ..Default::default() },
31            &[node0, node1],
32        )
33        .unwrap();
34    taffy.compute_layout(node, taffy::geometry::Size::MAX_CONTENT).unwrap();
35    println!("\nComputed tree:");
36    taffy::debug::print_tree(&taffy, node);
37    println!();
38    let Layout { size, location, .. } = taffy.layout(node).unwrap();
39    assert_eq!(size.width, 40f32, "width of node {:?}. Expected {}. Actual {}", node.data(), 40f32, size.width);
40    assert_eq!(size.height, 40f32, "height of node {:?}. Expected {}. Actual {}", node.data(), 40f32, size.height);
41    assert_eq!(location.x, 0f32, "x of node {:?}. Expected {}. Actual {}", node.data(), 0f32, location.x);
42    assert_eq!(location.y, 0f32, "y of node {:?}. Expected {}. Actual {}", node.data(), 0f32, location.y);
43    let Layout { size, location, .. } = taffy.layout(node0).unwrap();
44    assert_eq!(size.width, 40f32, "width of node {:?}. Expected {}. Actual {}", node0.data(), 40f32, size.width);
45    assert_eq!(size.height, 20f32, "height of node {:?}. Expected {}. Actual {}", node0.data(), 20f32, size.height);
46    assert_eq!(location.x, 0f32, "x of node {:?}. Expected {}. Actual {}", node0.data(), 0f32, location.x);
47    assert_eq!(location.y, 0f32, "y of node {:?}. Expected {}. Actual {}", node0.data(), 0f32, location.y);
48    let Layout { size, location, .. } = taffy.layout(node1).unwrap();
49    assert_eq!(size.width, 40f32, "width of node {:?}. Expected {}. Actual {}", node1.data(), 40f32, size.width);
50    assert_eq!(size.height, 20f32, "height of node {:?}. Expected {}. Actual {}", node1.data(), 20f32, size.height);
51    assert_eq!(location.x, 0f32, "x of node {:?}. Expected {}. Actual {}", node1.data(), 0f32, location.x);
52    assert_eq!(location.y, 20f32, "y of node {:?}. Expected {}. Actual {}", node1.data(), 20f32, location.y);
53}