tawasuyu/taffy

1#[test]
2fn block_margin_y_collapse_through_positive() {
3    #[allow(unused_imports)]
4    use taffy::{prelude::*, tree::Layout};
5    let mut taffy = taffy::Taffy::new();
6    let node0 = taffy
7        .new_leaf(taffy::style::Style {
8            display: taffy::style::Display::Block,
9            size: taffy::geometry::Size { width: auto(), height: taffy::style::Dimension::Length(10f32) },
10            margin: taffy::geometry::Rect {
11                left: zero(),
12                right: zero(),
13                top: zero(),
14                bottom: taffy::style::LengthPercentageAuto::Length(10f32),
15            },
16            ..Default::default()
17        })
18        .unwrap();
19    let node1 = taffy
20        .new_leaf(taffy::style::Style {
21            display: taffy::style::Display::Block,
22            margin: taffy::geometry::Rect {
23                left: zero(),
24                right: zero(),
25                top: taffy::style::LengthPercentageAuto::Length(10f32),
26                bottom: taffy::style::LengthPercentageAuto::Length(10f32),
27            },
28            ..Default::default()
29        })
30        .unwrap();
31    let node2 = taffy
32        .new_leaf(taffy::style::Style {
33            display: taffy::style::Display::Block,
34            size: taffy::geometry::Size { width: auto(), height: taffy::style::Dimension::Length(10f32) },
35            margin: taffy::geometry::Rect {
36                left: zero(),
37                right: zero(),
38                top: taffy::style::LengthPercentageAuto::Length(10f32),
39                bottom: zero(),
40            },
41            ..Default::default()
42        })
43        .unwrap();
44    let node = taffy
45        .new_with_children(
46            taffy::style::Style {
47                display: taffy::style::Display::Block,
48                size: taffy::geometry::Size { width: taffy::style::Dimension::Length(50f32), height: auto() },
49                ..Default::default()
50            },
51            &[node0, node1, node2],
52        )
53        .unwrap();
54    taffy.compute_layout(node, taffy::geometry::Size::MAX_CONTENT).unwrap();
55    println!("\nComputed tree:");
56    taffy::util::print_tree(&taffy, node);
57    println!();
58    let Layout { size, location, .. } = taffy.layout(node).unwrap();
59    assert_eq!(size.width, 50f32, "width of node {:?}. Expected {}. Actual {}", node, 50f32, size.width);
60    assert_eq!(size.height, 30f32, "height of node {:?}. Expected {}. Actual {}", node, 30f32, size.height);
61    assert_eq!(location.x, 0f32, "x of node {:?}. Expected {}. Actual {}", node, 0f32, location.x);
62    assert_eq!(location.y, 0f32, "y of node {:?}. Expected {}. Actual {}", node, 0f32, location.y);
63    let Layout { size, location, .. } = taffy.layout(node0).unwrap();
64    assert_eq!(size.width, 50f32, "width of node {:?}. Expected {}. Actual {}", node0, 50f32, size.width);
65    assert_eq!(size.height, 10f32, "height of node {:?}. Expected {}. Actual {}", node0, 10f32, size.height);
66    assert_eq!(location.x, 0f32, "x of node {:?}. Expected {}. Actual {}", node0, 0f32, location.x);
67    assert_eq!(location.y, 0f32, "y of node {:?}. Expected {}. Actual {}", node0, 0f32, location.y);
68    let Layout { size, location, .. } = taffy.layout(node1).unwrap();
69    assert_eq!(size.width, 50f32, "width of node {:?}. Expected {}. Actual {}", node1, 50f32, size.width);
70    assert_eq!(size.height, 0f32, "height of node {:?}. Expected {}. Actual {}", node1, 0f32, size.height);
71    assert_eq!(location.x, 0f32, "x of node {:?}. Expected {}. Actual {}", node1, 0f32, location.x);
72    assert_eq!(location.y, 20f32, "y of node {:?}. Expected {}. Actual {}", node1, 20f32, location.y);
73    let Layout { size, location, .. } = taffy.layout(node2).unwrap();
74    assert_eq!(size.width, 50f32, "width of node {:?}. Expected {}. Actual {}", node2, 50f32, size.width);
75    assert_eq!(size.height, 10f32, "height of node {:?}. Expected {}. Actual {}", node2, 10f32, size.height);
76    assert_eq!(location.x, 0f32, "x of node {:?}. Expected {}. Actual {}", node2, 0f32, location.x);
77    assert_eq!(location.y, 20f32, "y of node {:?}. Expected {}. Actual {}", node2, 20f32, location.y);
78}