1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
//! A collection of functions that are useful for unit testing your html! views.
use crate::VirtualNode;
impl VirtualNode {
/// Get a vector of all of the VirtualNode children / grandchildren / etc of
/// your virtual_node.
///
/// Children are visited recursively depth first.
///
/// # Examples
///
/// ```rust,ignore
/// # #[macro_use] extern crate percy_dom; fn main() {
/// let component = html! {
/// <div>
/// <span> {"Hi!"} </span>
/// <em> {"There!!"} </em>
/// <div> {"My Friend"} </div>
/// </div>
/// };
///
/// let children = component.children_recursive();
///
/// assert_eq!(children[2].tag(), "em");
/// # }
/// ```
pub fn children_recursive<'a>(&'a self) -> Vec<&'a VirtualNode> {
let mut descendants: Vec<&'a VirtualNode> = vec![];
match self {
VirtualNode::Text(_) => {}
VirtualNode::Element(element_node) => {
for child in element_node.children.iter() {
get_descendants(&mut descendants, child);
}
}
}
descendants.into_iter().collect()
}
}
fn get_descendants<'a>(descendants: &mut Vec<&'a VirtualNode>, node: &'a VirtualNode) {
descendants.push(node);
match node {
VirtualNode::Text(_) => {}
VirtualNode::Element(element_node) => {
for child in element_node.children.iter() {
get_descendants(descendants, child);
}
}
}
}
#[cfg(test)]
mod tests {
use super::*;
use crate::VElement;
/// Verify that we can return all of a node's descendants.
#[test]
fn children_recursive() {
let span = VirtualNode::element("span");
let mut em = VElement::new("em");
em.children.push(span);
let mut html = VElement::new("div");
html.children.push(em.into());
let html_node = VirtualNode::Element(html);
assert_eq!(html_node.children_recursive().len(), 2);
}
}