tawasuyu/taffy

1#[test]
2fn margin_auto_left_and_right_stretch() {
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            size: taffy::geometry::Size {
9                width: taffy::style::Dimension::Length(50f32),
10                height: taffy::style::Dimension::Length(50f32),
11            },
12            margin: taffy::geometry::Rect {
13                left: taffy::style::LengthPercentageAuto::Auto,
14                right: taffy::style::LengthPercentageAuto::Auto,
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::Length(50f32),
25                height: taffy::style::Dimension::Length(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::Stretch),
34                size: taffy::geometry::Size {
35                    width: taffy::style::Dimension::Length(200f32),
36                    height: taffy::style::Dimension::Length(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::util::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, 200f32, size.width);
49    assert_eq!(size.height, 200f32, "height of node {:?}. Expected {}. Actual {}", node, 200f32, size.height);
50    assert_eq!(location.x, 0f32, "x of node {:?}. Expected {}. Actual {}", node, 0f32, location.x);
51    assert_eq!(location.y, 0f32, "y of node {:?}. Expected {}. Actual {}", node, 0f32, location.y);
52    let Layout { size, location, .. } = taffy.layout(node0).unwrap();
53    assert_eq!(size.width, 50f32, "width of node {:?}. Expected {}. Actual {}", node0, 50f32, size.width);
54    assert_eq!(size.height, 50f32, "height of node {:?}. Expected {}. Actual {}", node0, 50f32, size.height);
55    assert_eq!(location.x, 50f32, "x of node {:?}. Expected {}. Actual {}", node0, 50f32, location.x);
56    assert_eq!(location.y, 0f32, "y of node {:?}. Expected {}. Actual {}", node0, 0f32, location.y);
57    let Layout { size, location, .. } = taffy.layout(node1).unwrap();
58    assert_eq!(size.width, 50f32, "width of node {:?}. Expected {}. Actual {}", node1, 50f32, size.width);
59    assert_eq!(size.height, 50f32, "height of node {:?}. Expected {}. Actual {}", node1, 50f32, size.height);
60    assert_eq!(location.x, 150f32, "x of node {:?}. Expected {}. Actual {}", node1, 150f32, location.x);
61    assert_eq!(location.y, 0f32, "y of node {:?}. Expected {}. Actual {}", node1, 0f32, location.y);
62}