tawasuyu/taffy

1#[test]
2fn margin_auto_top_and_bottom_stretch() {
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            size: taffy::geometry::Size {
10                width: taffy::style::Dimension::Points(50f32),
11                height: taffy::style::Dimension::Points(50f32),
12            },
13            margin: taffy::geometry::Rect {
14                left: zero(),
15                right: zero(),
16                top: taffy::style::LengthPercentageAuto::Auto,
17                bottom: taffy::style::LengthPercentageAuto::Auto,
18            },
19            ..Default::default()
20        })
21        .unwrap();
22    let node1 = taffy
23        .new_leaf(taffy::style::Style {
24            size: taffy::geometry::Size {
25                width: taffy::style::Dimension::Points(50f32),
26                height: taffy::style::Dimension::Points(50f32),
27            },
28            ..Default::default()
29        })
30        .unwrap();
31    let node = taffy
32        .new_with_children(
33            taffy::style::Style {
34                flex_direction: taffy::style::FlexDirection::Column,
35                align_items: Some(taffy::style::AlignItems::Stretch),
36                size: taffy::geometry::Size {
37                    width: taffy::style::Dimension::Points(200f32),
38                    height: taffy::style::Dimension::Points(200f32),
39                },
40                ..Default::default()
41            },
42            &[node0, node1],
43        )
44        .unwrap();
45    taffy.compute_layout(node, taffy::geometry::Size::MAX_CONTENT).unwrap();
46    println!("\nComputed tree:");
47    taffy::debug::print_tree(&taffy, node);
48    println!();
49    let Layout { size, location, .. } = taffy.layout(node).unwrap();
50    assert_eq!(size.width, 200f32, "width of node {:?}. Expected {}. Actual {}", node.data(), 200f32, size.width);
51    assert_eq!(size.height, 200f32, "height of node {:?}. Expected {}. Actual {}", node.data(), 200f32, size.height);
52    assert_eq!(location.x, 0f32, "x of node {:?}. Expected {}. Actual {}", node.data(), 0f32, location.x);
53    assert_eq!(location.y, 0f32, "y of node {:?}. Expected {}. Actual {}", node.data(), 0f32, location.y);
54    let Layout { size, location, .. } = taffy.layout(node0).unwrap();
55    assert_eq!(size.width, 50f32, "width of node {:?}. Expected {}. Actual {}", node0.data(), 50f32, size.width);
56    assert_eq!(size.height, 50f32, "height of node {:?}. Expected {}. Actual {}", node0.data(), 50f32, size.height);
57    assert_eq!(location.x, 0f32, "x of node {:?}. Expected {}. Actual {}", node0.data(), 0f32, location.x);
58    assert_eq!(location.y, 50f32, "y of node {:?}. Expected {}. Actual {}", node0.data(), 50f32, location.y);
59    let Layout { size, location, .. } = taffy.layout(node1).unwrap();
60    assert_eq!(size.width, 50f32, "width of node {:?}. Expected {}. Actual {}", node1.data(), 50f32, size.width);
61    assert_eq!(size.height, 50f32, "height of node {:?}. Expected {}. Actual {}", node1.data(), 50f32, size.height);
62    assert_eq!(location.x, 0f32, "x of node {:?}. Expected {}. Actual {}", node1.data(), 0f32, location.x);
63    assert_eq!(location.y, 150f32, "y of node {:?}. Expected {}. Actual {}", node1.data(), 150f32, location.y);
64}