39 lines
1.5 KiB
HTML
39 lines
1.5 KiB
HTML
<!DOCTYPE html>
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<meta charset="utf-8" />
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<title>Resource Timing should not include internal resources</title>
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<link rel="author" title="Google" href="http://www.google.com/" />
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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="/common/get-host-info.sub.js"></script>
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<p>This test validates that image resources which are part of an element's
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UA-defined interface are not exposed to the performance timeline. This uses an
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<audio> element as an example of an element with internal resources used
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for the playback controls, and verifies that resource timing entries are not
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created.
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</p>
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<!-- This element will render with internal resources for playback controls -->
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<audio controls></audio>
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<script>
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async_test(t => {
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const observer = new PerformanceObserver(t.step_func_done(events => {
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events.getEntries().forEach(entry => {
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assert_true(entry.initiatorType == "script" || entry.initiatorType == "img",
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"Resources loaded from this test should have initiatorType 'script' or 'img', but \"" +
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entry.name + "\" has '" + entry.initiatorType + "'.");
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});
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}));
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// Wait for one more resource to load before attaching listener, and then get
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// buffered entries.
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const image = document.createElement("img");
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image.src = "resources/blue.png";
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image.addEventListener("load", t.step_func(ev => {
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observer.observe({type: "resource", buffered: true});
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}));
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document.body.appendChild(image);
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}, "Resource timing should not include internal resources.");
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</script>
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