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[anchor-position] Support testing of polyfill #47156

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[anchor-position] Support testing of polyfill #47156

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09cbf3e
Add testForAnchorPos
jamesnw Jul 16, 2024
7ccb8f3
Remove formatting
jamesnw Jul 16, 2024
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5 changes: 3 additions & 2 deletions css/css-anchor-position/pseudo-element-anchor.html
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Original file line number Diff line number Diff line change
Expand Up @@ -2,6 +2,7 @@
<title>CSS Anchor Positioning: Pseudo elements as anchors</title>
<link rel="help" href="https://drafts.csswg.org/css-anchor-1/#position-anchor">
<script src="/resources/testharness.js"></script>
<script src="support/test-common.js"></script>
<script src="/resources/testharnessreport.js"></script>
<style>
.cb {
Expand Down Expand Up @@ -45,11 +46,11 @@
<div id="anchored2" class="anchored"></div>
</div>
<script>
test(() => {
testForAnchorPos(() => {
assert_equals(anchored1.offsetLeft, 100);
assert_equals(anchored1.offsetTop, 100);
}, "::before as anchor");
test(() => {
testForAnchorPos(() => {
assert_equals(anchored2.offsetLeft, 100);
assert_equals(anchored2.offsetTop, 100);
}, "::after as anchor");
Expand Down
16 changes: 16 additions & 0 deletions css/css-anchor-position/support/test-common.js
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Expand Up @@ -42,3 +42,19 @@ window.checkLayoutForAnchorPos = async function(selectorList, callDone = true) {
}
return window.checkLayout(selectorList, callDone);
}

// This function is a thin wrapper around `promise_test` (from
// resources/testharness.js). It also replaces `test`, but must be a
// promise_test due to potential for awaits. See the description of
// `checkLayoutForAnchorPos` for caveats and intended usage.
window.testForAnchorPos = async function(func, name, properties){
promise_test(async ()=>{
if (window.CHECK_LAYOUT_DELAY) {
assert_equals(window.INJECTED_SCRIPT,undefined,'CHECK_LAYOUT_DELAY is only allowed when serving WPT with --injected-script.');
await waitUntilNextAnimationFrame();
await waitUntilNextAnimationFrame();
await waitUntilNextAnimationFrame();
}
await func();
}, name, properties)
}