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//! A collection of functions that are useful for unit testing your html! views.
use crate::event::RealDom;
use crate::VirtualNode;
impl<Handle: RealDom> VirtualNode<Handle> {
/// 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<Handle>> {
let mut descendants: Vec<&'a VirtualNode<Handle>> = 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, Handle: RealDom>(
descendants: &mut Vec<&'a VirtualNode<Handle>>,
node: &'a VirtualNode<Handle>,
) {
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::VirtualElement;
/// Verify that we can return all of a node's descendants.
#[test]
fn children_recursive() {
let span = VirtualNode::<()>::new_element("span");
let mut em = VirtualElement::new("em");
em.children.push(span);
let mut html = VirtualElement::new("div");
html.children.push(em.into());
let html_node = VirtualNode::Element(html);
assert_eq!(html_node.children_recursive().len(), 2);
}
}