third_party/WebKit/LayoutTests/http/tests/performance-timing/paint-timing/first-contentful-bg-image.html - Issue 2932593002: Attempt 2: Update PaintTiming Web Perf APIs for FP & FCP to report swap time

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Issue 2932593002: Attempt 2: Update PaintTiming Web Perf APIs for FP & FCP to report swap time (Closed)

Patch Set: rebase to head Created 3 years, 6 months ago

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	1 <!DOCTYPE html>

	2 <head>

	3 <title>Performance Paint Timing Test: FCP due to background image</title>

	4 </head>

	5 <body>

	6 <script src="../../resources/testharness.js"></script>

	7 <script src="../../resources/testharnessreport.js"></script>

	8 <div id="main"></div>

	9 </body>

	10 <footer>

	11 <script>

	12 async_test(function (t) {

	13 const body = document.getElementsByTagName('body')[0];

	14 body.style.backgroundImage = 'url(resources/circles.png)';

	15 window.onload = function() {

	16 testRunner.capturePixelsAsyncThen(t.step_func_done(function() {

	17 const bufferedEntries = performance.getEntriesByType('paint');

	18 assert_equals(bufferedEntries.length, 2, "There should be two pa int timing instances.");

	19 assert_equals(bufferedEntries[0].entryType, "paint");

	20 assert_equals(bufferedEntries[0].name, "first-paint");

	21 assert_equals(bufferedEntries[1].entryType, "paint");

	22 assert_equals(bufferedEntries[1].name, "first-contentful-paint") ;

	23 }));

	24 };

	25 }, "First contentful paint fires due to background image render.");

	26 </script>

	27 <footer>

	28 </html>

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