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49 lines
1.9 KiB
HTML
49 lines
1.9 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 increasing the buffer size in onresourcetimingbufferfull callback of resource timing.</title>
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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 eventFired = false;
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setup(() => {
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// Get the browser into a consistent state.
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clearBufferAndSetSize(resource_timing_buffer_size);
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var increase = function() {
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performance.setResourceTimingBufferSize(resource_timing_buffer_size * 2);
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eventFired = true;
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}
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performance.addEventListener('resourcetimingbufferfull', increase);
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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, 2,
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'Both entries should be stored in resource timing buffer since its increases size once it overflows.');
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assert_true(entries[0].name.includes('empty.js'), "empty.js is in the entries buffer");
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assert_true(entries[1].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 increasing the buffer during the callback is enough for entries not to be dropped");
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</script>
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</body>
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</html>
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