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https://github.com/servo/servo
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55 lines
2.4 KiB
HTML
55 lines
2.4 KiB
HTML
<!DOCTYPE HTML>
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<meta charset=utf-8>
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<title>LongTask Timing: long tasks in long-name iframe containers</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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<h1>Longtasks in iframe</h1>
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<div id="log"></div>
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<script>
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const longContainerName = 'iframeWithLongNameMoreThan100CharactersSpaceHolderSpaceHolderSpaceHolderSpaceHolderSpaceHolderSpaceHolder';
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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 initialTime = performance.now();
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return new Promise(resolve => {
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const observer = new PerformanceObserver(t.step_func(entryList => {
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const entries = entryList.getEntries();
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assert_equals(entries.length, 1,
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'Exactly one entry is expected.');
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const longtask = entries[0];
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assert_equals(longtask.entryType, 'longtask');
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if (longtask.name == 'self' ||
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longtask.name == 'multiple-contexts' ||
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longtask.name == 'unknown')
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return;
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assert_equals(longtask.name, 'same-origin-descendant');
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assert_greater_than(longtask.duration, 50);
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assert_greater_than_equal(longtask.startTime, initialTime);
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const currentTime = performance.now();
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assert_less_than_equal(longtask.startTime, currentTime);
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// Assert the TaskAttributionTiming entry in attribution.
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assert_equals(longtask.attribution.length, 1,
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'Exactly one attribution entry is expected');
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const attribution = longtask.attribution[0];
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assert_equals(attribution.entryType, 'taskattribution');
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assert_equals(attribution.name, 'unknown');
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assert_equals(attribution.duration, 0);
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assert_equals(attribution.startTime, 0);
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assert_equals(attribution.containerId, longContainerName + '-id');
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assert_equals(attribution.containerName, longContainerName + '-name');
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assert_equals(attribution.containerSrc, 'resources/subframe-with-longtask.html');
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observer.disconnect();
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resolve();
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}));
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observer.observe({entryTypes: ['longtask']});
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const iframe = document.createElement('iframe');
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iframe.id = longContainerName + '-id';
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iframe.name = longContainerName + '-name';
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iframe.src = 'resources/subframe-with-longtask.html';
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document.body.appendChild(iframe);
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});
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}, `Performance longtask entries in ${longContainerName} are observable in parent.`);
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</script>
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</body>
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