1#[test]
2fn flex_shrink_to_zero() {
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: 0f32,
10 size: taffy::geometry::Size {
11 width: taffy::style::Dimension::Points(50f32),
12 height: taffy::style::Dimension::Points(50f32),
13 },
14 ..Default::default()
15 })
16 .unwrap();
17 let node1 = taffy
18 .new_leaf(taffy::style::Style {
19 flex_shrink: 1f32,
20 size: taffy::geometry::Size {
21 width: taffy::style::Dimension::Points(50f32),
22 height: taffy::style::Dimension::Points(50f32),
23 },
24 ..Default::default()
25 })
26 .unwrap();
27 let node2 = taffy
28 .new_leaf(taffy::style::Style {
29 flex_shrink: 0f32,
30 size: taffy::geometry::Size {
31 width: taffy::style::Dimension::Points(50f32),
32 height: taffy::style::Dimension::Points(50f32),
33 },
34 ..Default::default()
35 })
36 .unwrap();
37 let node = taffy
38 .new_with_children(
39 taffy::style::Style {
40 size: taffy::geometry::Size { width: taffy::style::Dimension::Points(75f32), height: auto() },
41 ..Default::default()
42 },
43 &[node0, node1, node2],
44 )
45 .unwrap();
46 taffy.compute_layout(node, taffy::geometry::Size::MAX_CONTENT).unwrap();
47 println!("\nComputed tree:");
48 taffy::debug::print_tree(&taffy, node);
49 println!();
50 let Layout { size, location, .. } = taffy.layout(node).unwrap();
51 assert_eq!(size.width, 75f32, "width of node {:?}. Expected {}. Actual {}", node.data(), 75f32, size.width);
52 assert_eq!(size.height, 50f32, "height of node {:?}. Expected {}. Actual {}", node.data(), 50f32, size.height);
53 assert_eq!(location.x, 0f32, "x of node {:?}. Expected {}. Actual {}", node.data(), 0f32, location.x);
54 assert_eq!(location.y, 0f32, "y of node {:?}. Expected {}. Actual {}", node.data(), 0f32, location.y);
55 let Layout { size, location, .. } = taffy.layout(node0).unwrap();
56 assert_eq!(size.width, 50f32, "width of node {:?}. Expected {}. Actual {}", node0.data(), 50f32, size.width);
57 assert_eq!(size.height, 50f32, "height of node {:?}. Expected {}. Actual {}", node0.data(), 50f32, size.height);
58 assert_eq!(location.x, 0f32, "x of node {:?}. Expected {}. Actual {}", node0.data(), 0f32, location.x);
59 assert_eq!(location.y, 0f32, "y of node {:?}. Expected {}. Actual {}", node0.data(), 0f32, location.y);
60 let Layout { size, location, .. } = taffy.layout(node1).unwrap();
61 assert_eq!(size.width, 0f32, "width of node {:?}. Expected {}. Actual {}", node1.data(), 0f32, size.width);
62 assert_eq!(size.height, 50f32, "height of node {:?}. Expected {}. Actual {}", node1.data(), 50f32, size.height);
63 assert_eq!(location.x, 50f32, "x of node {:?}. Expected {}. Actual {}", node1.data(), 50f32, location.x);
64 assert_eq!(location.y, 0f32, "y of node {:?}. Expected {}. Actual {}", node1.data(), 0f32, location.y);
65 let Layout { size, location, .. } = taffy.layout(node2).unwrap();
66 assert_eq!(size.width, 50f32, "width of node {:?}. Expected {}. Actual {}", node2.data(), 50f32, size.width);
67 assert_eq!(size.height, 50f32, "height of node {:?}. Expected {}. Actual {}", node2.data(), 50f32, size.height);
68 assert_eq!(location.x, 50f32, "x of node {:?}. Expected {}. Actual {}", node2.data(), 50f32, location.x);
69 assert_eq!(location.y, 0f32, "y of node {:?}. Expected {}. Actual {}", node2.data(), 0f32, location.y);
70}