use super::*;
#[test]
fn element_next_element_sibling_basic_example_works() -> Result<()> {
let html = r#"
<div id='host'>
<div id='div-01'>Here is div-01</div>
<div id='div-02'>Here is div-02</div>
<script id='marker'></script>
</div>
<button id='run'>run</button>
<p id='result'></p>
<script>
document.getElementById('run').addEventListener('click', () => {
let el = document.getElementById('div-01').nextElementSibling;
const names = [];
while (el) {
names.push(el.nodeName);
el = el.nextElementSibling;
}
document.getElementById('result').textContent = names.join(',');
});
</script>
"#;
let mut h = Harness::from_html(html)?;
h.click("#run")?;
h.assert_text("#result", "DIV,SCRIPT")?;
Ok(())
}
#[test]
fn element_next_element_sibling_ignores_non_element_nodes_and_updates_live() -> Result<()> {
let html = r#"
<ul id='list'><li id='a'>A</li><li id='b'>B</li><li id='c'>C</li></ul>
<button id='run'>run</button>
<p id='result'></p>
<script>
document.getElementById('run').addEventListener('click', () => {
const list = document.getElementById('list');
const b = document.getElementById('b');
const c = document.getElementById('c');
list.insertBefore(document.createTextNode('tail-text'), c);
const before = b.nextElementSibling.id;
c.remove();
const after = b.nextElementSibling === null;
document.getElementById('result').textContent = before + ':' + after;
});
</script>
"#;
let mut h = Harness::from_html(html)?;
h.click("#run")?;
h.assert_text("#result", "c:true")?;
Ok(())
}
#[test]
fn element_next_element_sibling_property_is_read_only() -> Result<()> {
let html = r#"
<div id='a'>A</div><div id='b'>B</div>
<button id='run'>run</button>
<script>
document.getElementById('run').addEventListener('click', () => {
const a = document.getElementById('a');
a.nextElementSibling = document.createElement('div');
});
</script>
"#;
let mut h = Harness::from_html(html)?;
match h.click("#run") {
Err(Error::ScriptRuntime(message)) => {
assert!(
message.contains("nextElementSibling is read-only"),
"unexpected runtime error message: {message}"
);
}
other => panic!("expected runtime error, got: {other:?}"),
}
Ok(())
}