tawasuyu/taffy

1#[test]
2fn margin_auto_mutiple_children_column() {
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: zero(),
14                right: zero(),
15                top: taffy::style::LengthPercentageAuto::Auto,
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            margin: taffy::geometry::Rect {
28                left: zero(),
29                right: zero(),
30                top: taffy::style::LengthPercentageAuto::Auto,
31                bottom: zero(),
32            },
33            ..Default::default()
34        })
35        .unwrap();
36    let node2 = taffy
37        .new_leaf(taffy::style::Style {
38            size: taffy::geometry::Size {
39                width: taffy::style::Dimension::Length(50f32),
40                height: taffy::style::Dimension::Length(50f32),
41            },
42            ..Default::default()
43        })
44        .unwrap();
45    let node = taffy
46        .new_with_children(
47            taffy::style::Style {
48                flex_direction: taffy::style::FlexDirection::Column,
49                align_items: Some(taffy::style::AlignItems::Center),
50                size: taffy::geometry::Size {
51                    width: taffy::style::Dimension::Length(200f32),
52                    height: taffy::style::Dimension::Length(200f32),
53                },
54                ..Default::default()
55            },
56            &[node0, node1, node2],
57        )
58        .unwrap();
59    taffy.compute_layout(node, taffy::geometry::Size::MAX_CONTENT).unwrap();
60    println!("\nComputed tree:");
61    taffy::util::print_tree(&taffy, node);
62    println!();
63    let Layout { size, location, .. } = taffy.layout(node).unwrap();
64    assert_eq!(size.width, 200f32, "width of node {:?}. Expected {}. Actual {}", node, 200f32, size.width);
65    assert_eq!(size.height, 200f32, "height of node {:?}. Expected {}. Actual {}", node, 200f32, size.height);
66    assert_eq!(location.x, 0f32, "x of node {:?}. Expected {}. Actual {}", node, 0f32, location.x);
67    assert_eq!(location.y, 0f32, "y of node {:?}. Expected {}. Actual {}", node, 0f32, location.y);
68    let Layout { size, location, .. } = taffy.layout(node0).unwrap();
69    assert_eq!(size.width, 50f32, "width of node {:?}. Expected {}. Actual {}", node0, 50f32, size.width);
70    assert_eq!(size.height, 50f32, "height of node {:?}. Expected {}. Actual {}", node0, 50f32, size.height);
71    assert_eq!(location.x, 75f32, "x of node {:?}. Expected {}. Actual {}", node0, 75f32, location.x);
72    assert_eq!(location.y, 25f32, "y of node {:?}. Expected {}. Actual {}", node0, 25f32, location.y);
73    let Layout { size, location, .. } = taffy.layout(node1).unwrap();
74    assert_eq!(size.width, 50f32, "width of node {:?}. Expected {}. Actual {}", node1, 50f32, size.width);
75    assert_eq!(size.height, 50f32, "height of node {:?}. Expected {}. Actual {}", node1, 50f32, size.height);
76    assert_eq!(location.x, 75f32, "x of node {:?}. Expected {}. Actual {}", node1, 75f32, location.x);
77    assert_eq!(location.y, 100f32, "y of node {:?}. Expected {}. Actual {}", node1, 100f32, location.y);
78    let Layout { size, location, .. } = taffy.layout(node2).unwrap();
79    assert_eq!(size.width, 50f32, "width of node {:?}. Expected {}. Actual {}", node2, 50f32, size.width);
80    assert_eq!(size.height, 50f32, "height of node {:?}. Expected {}. Actual {}", node2, 50f32, size.height);
81    assert_eq!(location.x, 75f32, "x of node {:?}. Expected {}. Actual {}", node2, 75f32, location.x);
82    assert_eq!(location.y, 150f32, "y of node {:?}. Expected {}. Actual {}", node2, 150f32, location.y);
83}