зеркало из https://github.com/mozilla/gecko-dev.git
56 строки
2.2 KiB
HTML
56 строки
2.2 KiB
HTML
<!DOCTYPE HTML>
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<html>
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<head onload>
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<meta charset="utf-8" />
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<title>This test validates the behavior of read and clear operation in onresourcetimingbufferfull callback of resource timing.</title>
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<link rel="author" title="Intel" href="http://www.intel.com/" />
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<link rel="help" href="http://www.w3.org/TR/resource-timing/#performanceresourcetiming"/>
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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/buffer-full-utilities.js"></script>
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</head>
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<body>
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<script>
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const resource_timing_buffer_size = 1;
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let global_buffer = [];
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let eventFired = false;
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setup(() => {
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clearBufferAndSetSize(resource_timing_buffer_size);
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let store_and_clear = function() {
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const entryList = performance.getEntriesByType('resource');
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entryList.forEach(function (entry) {
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global_buffer.push(entry);
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});
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performance.clearResourceTimings();
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eventFired = true;
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}
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performance.addEventListener('resourcetimingbufferfull', store_and_clear);
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});
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let overflowTheBuffer = () => {
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return new Promise(resolve => {
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// This resource overflows the entry buffer, and goes into the secondary buffer.
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appendScript('resources/empty_script.js', resolve);
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});
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};
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let testThatBufferContainsTheRightResources = () => {
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let entries = performance.getEntriesByType('resource');
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assert_equals(entries.length, 1,
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"Only the last entry should be stored in resource timing buffer since it's cleared once it overflows.");
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assert_equals(global_buffer.length, 1, '1 resource timing entry should be moved to global buffer.');
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assert_true(global_buffer[0].name.includes('empty.js'), "empty.js is in the global buffer");
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assert_true(entries[0].name.includes('empty_script.js'), "empty_script.js is in the entries buffer");
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};
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promise_test(async () => {
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await fillUpTheBufferWithSingleResource("resources/empty.js");
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await overflowTheBuffer();
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await waitForEventToFire();
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testThatBufferContainsTheRightResources();
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}, "Test that entries overflowing the buffer trigger the buffer full event, can be stored, and find themselves in the primary buffer after it's cleared.");
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</script>
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</body>
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</html>
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