third_party/WebKit/LayoutTests/intersection-observer/timestamp.html - Issue 2645283008: IntersectionObserver: Always send an initial notification.

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Issue 2645283008: IntersectionObserver: Always send an initial notification. (Closed)

Patch Set: Fix unit test Created 3 years, 10 months ago

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1 <!DOCTYPE html>	1 <!DOCTYPE html>

2 <script src="../resources/testharness.js"></script>	2 <script src="../resources/testharness.js"></script>

3 <script src="../resources/testharnessreport.js"></script>	3 <script src="../resources/testharnessreport.js"></script>

4 <script src="./resources/intersection-observer-test-utils.js"></script>	4 <script src="./resources/intersection-observer-test-utils.js"></script>

5	5

6 <style>	6 <style>

7 pre, #log {	7 pre, #log {

8 position: absolute;	8 position: absolute;

9 top: 0;	9 top: 0;

10 left: 200px;	10 left: 200px;

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60 };	60 };

61 }, timeSkew);	61 }, timeSkew);

62 }, "Check that timestamps correspond to the to execution context that created th e observer.");	62 }, "Check that timestamps correspond to the to execution context that created th e observer.");

63	63

64 function step1() {	64 function step1() {

65 document.scrollingElement.scrollTop = 200;	65 document.scrollingElement.scrollTop = 200;

66 targetIframe.contentDocument.scrollingElement.scrollTop = 250;	66 targetIframe.contentDocument.scrollingElement.scrollTop = 250;

67 topWindowTimeBeforeNotification = performance.now();	67 topWindowTimeBeforeNotification = performance.now();

68 iframeWindowTimeBeforeNotification = targetIframe.contentWindow.performance.no w();	68 iframeWindowTimeBeforeNotification = targetIframe.contentWindow.performance.no w();

69 runTestCycle(step2, "Generate notifications.");	69 runTestCycle(step2, "Generate notifications.");

70 assert_equals(topWindowEntries.length, 0, "No notifications to top window obse rver.");	70 assert_equals(topWindowEntries.length, 1, "One notification to top window obse rver.");

71 assert_equals(iframeWindowEntries.length, 0, "No notifications to iframe obser ver.");	71 assert_equals(iframeWindowEntries.length, 1, "One notification to iframe obser ver.");

72 }	72 }

73	73

74 function step2() {	74 function step2() {

75 document.scrollingElement.scrollTop = 0;	75 document.scrollingElement.scrollTop = 0;

76 var topWindowTimeAfterNotification = performance.now();	76 var topWindowTimeAfterNotification = performance.now();

77 var iframeWindowTimeAfterNotification = targetIframe.contentWindow.performance .now();	77 var iframeWindowTimeAfterNotification = targetIframe.contentWindow.performance .now();

78	78

79 // Test results are only significant if there's a gap between	79 // Test results are only significant if there's a gap between

80 // top window time and iframe window time.	80 // top window time and iframe window time.

81 assert_greater_than(topWindowTimeBeforeNotification, iframeWindowTimeAfterNoti fication,	81 assert_greater_than(topWindowTimeBeforeNotification, iframeWindowTimeAfterNoti fication,

82 "Time ranges for top and iframe windows are disjoint.");	82 "Time ranges for top and iframe windows are disjoint.");

83	83

84 assert_equals(topWindowEntries.length, 1, "Top window observer has one notific ation.");	84 assert_equals(topWindowEntries.length, 2, "Top window observer has two notific ations.");

85 assert_between_inclusive(	85 assert_between_inclusive(

86 topWindowEntries[0].time,	86 topWindowEntries[1].time,

87 topWindowTimeBeforeNotification,	87 topWindowTimeBeforeNotification,

88 topWindowTimeAfterNotification,	88 topWindowTimeAfterNotification,

89 "Notification to top window observer is within the expected range.");	89 "Notification to top window observer is within the expected range.");

90	90

91 assert_equals(iframeWindowEntries.length, 1, "Iframe observer has one notifica tion.");	91 assert_equals(iframeWindowEntries.length, 2, "Iframe observer has two notifica tions.");

92 assert_between_inclusive(	92 assert_between_inclusive(

93 iframeWindowEntries[0].time,	93 iframeWindowEntries[1].time,

94 iframeWindowTimeBeforeNotification,	94 iframeWindowTimeBeforeNotification,

95 iframeWindowTimeAfterNotification,	95 iframeWindowTimeAfterNotification,

96 "Notification to iframe observer is within the expected range.");	96 "Notification to iframe observer is within the expected range.");

97 }	97 }

98 </script>	98 </script>

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