third_party/WebKit/LayoutTests/fast/performance/performance-observer.html

   1 <!DOCTYPE html>
   2 <script src="../../resources/js-test.js"></script>
   3 <script>
   4
   5 description("This tests that PerformanceObserver gets called the right number of times.");
   6
   7 window.jsTestIsAsync = true;
   8
   9 var entries = [];
  10
  11 var expectedEntries = [
  12     {entryType:'mark', name:'mark_1'},
  13     {entryType:'mark', name:'mark_2'},
  14     {entryType:'measure', name:'measure_1'}
  15 ];
  16
  17 var observer = new PerformanceObserver(performanceCallback);
  18
  19 function performanceCallback(performanceEntryList)
  20 {
  21     entries = entries.concat(performanceEntryList.getEntries());
  22     if (entries.length != expectedEntries.length)
  23         return;
  24     shouldBe('entries[0].entryType', 'expectedEntries[0].entryType');
  25     shouldBe('entries[0].name', 'expectedEntries[0].name');
  26     shouldBe('entries[1].entryType', 'expectedEntries[1].entryType');
  27     shouldBe('entries[1].name', 'expectedEntries[1].name');
  28     shouldBe('entries[2].entryType', 'expectedEntries[2].entryType');
  29     shouldBe('entries[2].name', 'expectedEntries[2].name');
  30     finishJSTest();
  31 }
  32
  33 function performMeasure()
  34 {
  35     window.performance.measure('measure_1', 'mark_1', 'mark_2');
  36 }
  37
  38 var config = { entryTypes: ['mark', 'measure'] };
  39 observer.observe(config);
  40
  41 window.performance.mark('mark_1');
  42 window.performance.mark('mark_2');
  43
  44 window.setTimeout(performMeasure, 0);
  45 </script>