tawasuyu/taffy

1#[test]
2fn margin_auto_left_stretching_child() {
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_grow: 1f32,
10            flex_shrink: 1f32,
11            flex_basis: taffy::style::Dimension::Percent(0f32),
12            margin: taffy::geometry::Rect {
13                left: taffy::style::LengthPercentageAuto::Auto,
14                right: zero(),
15                top: zero(),
16                bottom: zero(),
17            },
18            ..Default::default()
19        })
20        .unwrap();
21    let node1 = taffy
22        .new_leaf(taffy::style::Style {
23            size: taffy::geometry::Size {
24                width: taffy::style::Dimension::Points(50f32),
25                height: taffy::style::Dimension::Points(50f32),
26            },
27            ..Default::default()
28        })
29        .unwrap();
30    let node = taffy
31        .new_with_children(
32            taffy::style::Style {
33                align_items: Some(taffy::style::AlignItems::Center),
34                size: taffy::geometry::Size {
35                    width: taffy::style::Dimension::Points(200f32),
36                    height: taffy::style::Dimension::Points(200f32),
37                },
38                ..Default::default()
39            },
40            &[node0, node1],
41        )
42        .unwrap();
43    taffy.compute_layout(node, taffy::geometry::Size::MAX_CONTENT).unwrap();
44    println!("\nComputed tree:");
45    taffy::debug::print_tree(&taffy, node);
46    println!();
47    let Layout { size, location, .. } = taffy.layout(node).unwrap();
48    assert_eq!(size.width, 200f32, "width of node {:?}. Expected {}. Actual {}", node.data(), 200f32, size.width);
49    assert_eq!(size.height, 200f32, "height of node {:?}. Expected {}. Actual {}", node.data(), 200f32, size.height);
50    assert_eq!(location.x, 0f32, "x of node {:?}. Expected {}. Actual {}", node.data(), 0f32, location.x);
51    assert_eq!(location.y, 0f32, "y of node {:?}. Expected {}. Actual {}", node.data(), 0f32, location.y);
52    let Layout { size, location, .. } = taffy.layout(node0).unwrap();
53    assert_eq!(size.width, 150f32, "width of node {:?}. Expected {}. Actual {}", node0.data(), 150f32, size.width);
54    assert_eq!(size.height, 0f32, "height of node {:?}. Expected {}. Actual {}", node0.data(), 0f32, size.height);
55    assert_eq!(location.x, 0f32, "x of node {:?}. Expected {}. Actual {}", node0.data(), 0f32, location.x);
56    assert_eq!(location.y, 100f32, "y of node {:?}. Expected {}. Actual {}", node0.data(), 100f32, location.y);
57    let Layout { size, location, .. } = taffy.layout(node1).unwrap();
58    assert_eq!(size.width, 50f32, "width of node {:?}. Expected {}. Actual {}", node1.data(), 50f32, size.width);
59    assert_eq!(size.height, 50f32, "height of node {:?}. Expected {}. Actual {}", node1.data(), 50f32, size.height);
60    assert_eq!(location.x, 150f32, "x of node {:?}. Expected {}. Actual {}", node1.data(), 150f32, location.x);
61    assert_eq!(location.y, 75f32, "y of node {:?}. Expected {}. Actual {}", node1.data(), 75f32, location.y);
62}