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Auto merge of #25228 - servo-wpt-sync:wpt_update_10-12-2019, r=jdm

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Sync WPT with upstream (10-12-2019)

Automated downstream sync of changes from upstream as of 10-12-2019.
[no-wpt-sync]
r? @servo-wpt-sync
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bors-servo 2019-12-11 00:17:09 -05:00 • committed by GitHub
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39
tests/wpt/web-platform-tests/html/semantics/document-metadata/the-style-element/mutations.window.js Normal file
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test(t => {
const style = document.body.appendChild(document.createElement("style"));
const sheet = style.sheet;
t.add_cleanup(() => style.remove());
assert_not_equals(sheet, null);
style.appendChild(new Comment());
assert_not_equals(sheet, style.sheet);
}, "Mutating the style element: inserting a Comment node");
test(t => {
const style = document.body.appendChild(document.createElement("style"));
t.add_cleanup(() => style.remove());
const comment = style.appendChild(new Comment());
const sheet = style.sheet;
comment.appendData("x");
assert_not_equals(sheet, style.sheet);
}, "Mutating the style element: mutating a Comment node");
test(t => {
const style = document.body.appendChild(document.createElement("style"));
t.add_cleanup(() => style.remove());
const text1 = style.appendChild(new Text("1"));
const text2 = style.appendChild(new Text("2"));
assert_equals(style.textContent, "12");
assert_equals(style.childNodes.length, 2);
const sheet = style.sheet;
style.normalize();
assert_equals(style.childNodes.length, 1);
assert_not_equals(sheet, style.sheet);
}, "Mutating the style element: using normalize()");
test(t => {
const style = document.body.appendChild(document.createElement("style"));
t.add_cleanup(() => style.remove());
const comment = style.appendChild(new Comment());
const sheet = style.sheet;
comment.remove();
assert_not_equals(sheet, style.sheet);
}, "Mutating the style element: removing a Comment node");