36 lines
1.3 KiB
HTML
36 lines
1.3 KiB
HTML
<!DOCTYPE HTML>
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<meta charset=utf-8>
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<title>LongTask Timing: Promise resolvers</title>
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<body>
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<script src="/resources/testharness.js"></script>
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<script src="/resources/testharnessreport.js"></script>
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<script src="resources/utils.js"></script>
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<h1>Long Task: promise resolvers</h1>
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<script>
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function test_promise_long_task(name, promise) {
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promise_test(async t => {
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assert_implements(window.PerformanceLongTaskTiming, 'Longtasks are not supported.');
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const longTaskPromise = new Promise(resolve => {
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const observer = new PerformanceObserver(t.step_func(entryList => {
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observer.disconnect();
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resolve(entryList.getEntries());
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}));
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observer.observe({entryTypes: ['longtask']});
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});
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await promise().catch(() => {});
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busyWait();
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const entries = await longTaskPromise;
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assert_greater_than_equal(entries.length, 1);
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}, `Performance longtask entries after a promise: ${name}`);
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}
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test_promise_long_task("successful fetch", () => fetch("/common/dummy.xml"));
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test_promise_long_task("Response.text()", () =>
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fetch("/common/dummy.xml").then(r => r.text()));
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test_promise_long_task("rejected fetch", () => fetch("/common/non-existent.xml"));
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test_promise_long_task("JSON error", () => fetch("/common/dummy.xml").then(r => r.json()));
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</script>
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</body>
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