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Test Info: Warnings
- This test has a WPT meta file that expects 1 subtest issues.
- This WPT test may be referenced by the following Test IDs:
- /paint-timing/with-first-paint/child-painting-first-image.html - WPT Dashboard Interop Dashboard
<!DOCTYPE html>
<body>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script>
var entriesExpectToReceive = [
{
'entryType': 'paint',
'name': 'first-paint'
},
{
'entryType': 'paint',
'name': 'first-contentful-paint'
}
];
setup({"hide_test_state": true});
async_test(function (t) {
assert_implements(window.PerformancePaintTiming, "Paint Timing isn't supported.");
window.addEventListener('message', t.step_func(e => {
// When only child frame paints, expect only first-paint.
for (let i = 0; i < entriesExpectToReceive.length; i++) {
if (entriesExpectToReceive[i].entryType == e.data.entryType &&
entriesExpectToReceive[i].name == e.data.name) {
entriesExpectToReceive.splice(i, 1);
break;
}
}
if (entriesExpectToReceive.length == 0) {
const bufferedEntries = performance.getEntriesByType('paint');
assert_equals(bufferedEntries.length, 1);
assert_equals(bufferedEntries[0].entryType, 'paint');
assert_equals(bufferedEntries[0].name, 'first-paint');
t.done();
}
}));
const iframe = document.createElement('iframe');
iframe.id = 'child-iframe';
iframe.src = '../resources/subframe-painting.html';
document.body.appendChild(iframe);
}, 'Parent frame ignores paint-timing events fired from child image rendering.');
</script>
</body>
</html>