third_party/WebKit/LayoutTests/fast/dom/timer-throttling-hidden-page.html - Issue 2620743002: Don't throttle web views until they've been in the background for 10s

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Issue 2620743002: Don't throttle web views until they've been in the background for 10s (Closed)

Patch Set: Remove tricky to fix but redundant layout test Created 3 years, 11 months ago

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1 <html>

2 <head>

3 <script src="../../resources/js-test.js"></script>

4 <script>

5 description('<a href="https://bugs.webkit.org/show_bug.cgi?id=98474">Bug 98474</a>: Throttle DOM timers on hidden pages and <a href="http://crbug.com/40 0343">bug 400343</a> prerender pages.');

6

7 var jsTestIsAsync = true;

8 var previousTime = 0;

9 var timerCount = 0;

10 var firstTimerWhileNotVisible = true;

11 var isPageVisible = true;

12 var timeoutInterval = 100;

13 var tolerance = 20;

14 var timerAlignmentInterval = 1000;

15

16 function testTimer()

17 {

18 var time = Date.now();

19 if (!isPageVisible) {

20 if (firstTimerWhileNotVisible) {

21 firstTimerIntervalWhilePageNotVisible = time - previousTime;

22 var minValue = timeoutInterval - tolerance;

23 shouldBeGreaterThanOrEqual("firstTimerIntervalWhilePageNotVi sible", minValue.toString());

24 var maxValue = timeoutInterval + timerAlignmentInterval + to lerance;

25 shouldBeTrue("firstTimerIntervalWhilePageNotVisible <= " + m axValue);

26 firstTimerWhileNotVisible = false;

27 } else {

28 timerIntervalWhilePageNotVisible = time - previousTime;

29 shouldBeCloseTo("timerIntervalWhilePageNotVisible", timerAli gnmentInterval, tolerance);

30 }

31 } else {

32 timerIntervalWhilePageVisible = time - previousTime;

33 shouldBeCloseTo("timerIntervalWhilePageVisible", timeoutInterval , tolerance);

34 }

35

36 timerCount++;

37 previousTime = time;

38

39 if (timerCount == 1) {

40 testRunner.setPageVisibility("hidden");

41 isPageVisible = false;

42 } else if (timerCount == 3) {

43 testRunner.setPageVisibility("visible");

44 isPageVisible = true;

45 } else if (timerCount == 5) {

46 testRunner.setPageVisibility("prerender");

47 isPageVisible = false;

48 firstTimerWhileNotVisible = true;

49 } else if (timerCount == 7) {

50 testRunner.setPageVisibility("visible");

51 isPageVisible = true;

52 } else if (timerCount >= 8){

53 finishJSTest();

54 return;

55 }

56 previousTime = Date.now();

57 setTimeout(testTimer, timeoutInterval);

58 }

59

60 function runTest()

61 {

62 if (!window.testRunner) {

63 debug('This test requires testRunner');

64 return;

65 }

66

67 var timeoutIntervalSpans = document.getElementsByClassName('timeoutI nterval');

68 for (var i = 0; i < timeoutIntervalSpans.length; i++)

69 timeoutIntervalSpans[i].innerText = timeoutInterval;

70

71 document.getElementById('alignmentInterval').innerText = timerAlignm entInterval / 1000;

72

73 testRunner.dumpAsText();

74 previousTime = Date.now();

75 setTimeout(testTimer, timeoutInterval);

76 }

77 </script>

78 </head>

79 <body onload="runTest()">

80 <p>

81 This test measures the time taken to fire a <span class="timeoutInterval"></ span>ms DOM Timer when the page visibility is set to "visible", "hidden", "visib le", "prerender" and then back to "visible". Due to page timer throttling, the timer should fire close to <span id="alignmentInterval"></span>s when page is hi dden or prerender. And it should fire close to <span class="timeoutInterval"></ span>ms, when the page is visible.

82 </p>

83 </body>

84 </html>

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