third_party/WebKit/LayoutTests/fast/performance/performance-first-paint-timing-observable.html - Issue 2860143002: Add tests for paint-timing, and move existing tests to same location

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Issue 2860143002: Add tests for paint-timing, and move existing tests to same location (Closed)

Patch Set: Created 3 years, 7 months ago

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1 <!DOCTYPE html>

2 <head>

3 <title>Performance Paint Timing Test</title>

4 </head>

5 <body>

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

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

8 <script>

9

10 async_test(function (t) {

11 var observer = new PerformanceObserver(

12 t.step_func(function (entryList) {

13 var entries = entryList.getEntries();

14 // Nothing contentful to be painted yet.

15 assert_equals(entries.length, 1,

16 "There should be only first paint timing instance.");

17 assert_equals(entries[0].entryType, "paint",

18 "Expected entryType to be: paint.");

19 assert_equals(entries[0].name, "first-paint",

20 "Expected name to be: first-paint.");

21 assert_equals(entries[0].duration, 0,

22 "Expected duration to be: 0.");

23 observer.disconnect();

24 t.done();

25 })

26 );

27 observer.observe({entryTypes: ["paint"]});

28

29 }, "Performance first paint timing entry is observable.");

30 </script>

31

32 <div style="background-color:black;color:white;padding:20px;"></div>

33 </body>

34 </html>

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