forked from LeenkxTeam/Kmake
54 lines
1.8 KiB
HTML
54 lines
1.8 KiB
HTML
<!DOCTYPE html>
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<html>
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<head>
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<meta charset="utf-8" />
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<title>Resource Timing - cached resources generate performance entries</title>
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<link rel="author" title="Google" href="http://www.google.com/" />
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<link rel="help"
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href="https://www.w3.org/TR/resource-timing-2/#resources-included-in-the-performanceresourcetiming-interface"/>
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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/entry-invariants.js"></script>
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<script src="resources/resource-loaders.js"></script>
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</head>
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<body>
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<h1>Description</h1>
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<p>This test validates that a 304 Not Modified resource appears in the
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Performance Timeline.</p>
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<script>
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// Need to fetch the same resource twice; the first will get a 200 response but
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// the second request should be cached and get a 304.
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promise_test(async () => {
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performance.clearResourceTimings();
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const unique = Math.random();
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const path = `resources/fake_responses.py?tag=${unique}`;
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await load.xhr_sync(path);
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await load.xhr_sync(path, {"If-None-Match": `${unique}`});
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const entries = await new Promise(resolve => {
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const accumulator = [];
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new PerformanceObserver(entry_list => {
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entry_list.getEntries().forEach(entry => {
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accumulator.push(entry);
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});
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if (accumulator.length >= 2) {
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resolve(accumulator);
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}
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}).observe({'type': 'resource', 'buffered': true});
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});
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if (entries.length != 2) {
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throw new Error(`Expecting 2 but got ${entries.length} entries`);
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}
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assert_equals(entries[0].name, entries[1].name,
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"Both entries should have the same name");
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invariants.assert_tao_pass_no_redirect_http(entries[0]);
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invariants.assert_tao_pass_304_not_modified_http(entries[1]);
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}, "304 responses should still show up in the PerformanceTimeline");
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</script>
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</body>
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</html>
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