tawasuyu/taffy

1#[test]
2fn flex_grow_within_constrained_max_column() {
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(taffy::style::Style {
9            flex_shrink: 1f32,
10            flex_basis: taffy::style::Dimension::Points(100f32),
11            ..Default::default()
12        })
13        .unwrap();
14    let node1 = taffy
15        .new_leaf(taffy::style::Style {
16            size: taffy::geometry::Size { width: auto(), height: taffy::style::Dimension::Points(50f32) },
17            ..Default::default()
18        })
19        .unwrap();
20    let node = taffy
21        .new_with_children(
22            taffy::style::Style {
23                flex_direction: taffy::style::FlexDirection::Column,
24                size: taffy::geometry::Size { width: taffy::style::Dimension::Points(100f32), height: auto() },
25                max_size: taffy::geometry::Size { width: auto(), height: taffy::style::Dimension::Points(100f32) },
26                ..Default::default()
27            },
28            &[node0, node1],
29        )
30        .unwrap();
31    taffy.compute_layout(node, taffy::geometry::Size::MAX_CONTENT).unwrap();
32    println!("\nComputed tree:");
33    taffy::debug::print_tree(&taffy, node);
34    println!();
35    let Layout { size, location, .. } = taffy.layout(node).unwrap();
36    assert_eq!(size.width, 100f32, "width of node {:?}. Expected {}. Actual {}", node.data(), 100f32, size.width);
37    assert_eq!(size.height, 100f32, "height of node {:?}. Expected {}. Actual {}", node.data(), 100f32, size.height);
38    assert_eq!(location.x, 0f32, "x of node {:?}. Expected {}. Actual {}", node.data(), 0f32, location.x);
39    assert_eq!(location.y, 0f32, "y of node {:?}. Expected {}. Actual {}", node.data(), 0f32, location.y);
40    let Layout { size, location, .. } = taffy.layout(node0).unwrap();
41    assert_eq!(size.width, 100f32, "width of node {:?}. Expected {}. Actual {}", node0.data(), 100f32, size.width);
42    assert_eq!(size.height, 67f32, "height of node {:?}. Expected {}. Actual {}", node0.data(), 67f32, size.height);
43    assert_eq!(location.x, 0f32, "x of node {:?}. Expected {}. Actual {}", node0.data(), 0f32, location.x);
44    assert_eq!(location.y, 0f32, "y of node {:?}. Expected {}. Actual {}", node0.data(), 0f32, location.y);
45    let Layout { size, location, .. } = taffy.layout(node1).unwrap();
46    assert_eq!(size.width, 100f32, "width of node {:?}. Expected {}. Actual {}", node1.data(), 100f32, size.width);
47    assert_eq!(size.height, 33f32, "height of node {:?}. Expected {}. Actual {}", node1.data(), 33f32, size.height);
48    assert_eq!(location.x, 0f32, "x of node {:?}. Expected {}. Actual {}", node1.data(), 0f32, location.x);
49    assert_eq!(location.y, 67f32, "y of node {:?}. Expected {}. Actual {}", node1.data(), 67f32, location.y);
50}