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<!doctype html>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<link rel="stylesheet" href="resources/empty_style.css">
<link rel="stylesheet" href="resources/non_exist.css">
<script>
promise_test(async () => {
const css_resource_timing_entries = await new Promise(resolve => {
new PerformanceObserver((list, observer) => {
let css_resource_timing_entries = list.getEntries().filter(e => e.name.includes('css'));
if (css_resource_timing_entries.length >= 2) {
resolve(css_resource_timing_entries);
}
}).observe({ 'type': 'resource', 'buffered': true });
});
assert_equals(css_resource_timing_entries.length, 2,
'There should be two resource timing entries for css resources');
assert_equals(css_resource_timing_entries.filter(
e => e.name.includes('empty_style.css')).length, 1,
'There should be one resource timing entry for successfully fetched resource.');
assert_equals(css_resource_timing_entries.filter(
e => e.name.includes('non_exist.css')).length, 1,
'There should be one resource timing entry for fetching failed resource.');
}, 'Resource fetched by HTTP protocol should have resource timing entry emitted, \
even when the fetch failed.');
</script>
</html>
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