third_party/WebKit/LayoutTests/intersection-observer/same-document-root.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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49 }, { root: root });	49 }, { root: root });

50 observer.observe(target);	50 observer.observe(target);

51 entries = entries.concat(observer.takeRecords());	51 entries = entries.concat(observer.takeRecords());

52 assert_equals(entries.length, 0, "No initial notifications.");	52 assert_equals(entries.length, 0, "No initial notifications.");

53 runTestCycle(step0, "First rAF");	53 runTestCycle(step0, "First rAF");

54 }, "IntersectionObserver in a single document with explicit root.");	54 }, "IntersectionObserver in a single document with explicit root.");

55	55

56 function step0() {	56 function step0() {

57 document.scrollingElement.scrollTop = 600;	57 document.scrollingElement.scrollTop = 600;

58 runTestCycle(step1, "document.scrollingElement.scrollTop = 600.");	58 runTestCycle(step1, "document.scrollingElement.scrollTop = 600.");

59 assert_equals(entries.length, 0, "No notifications after first rAF.");	59 checkLastEntry(entries, 0, [11, 111, 1011, 1111, 0, 0, 0, 0, 11, 111, 711, 911 , target]);

60 }	60 }

61	61

62 function step1() {	62 function step1() {

63 root.scrollTop = 150;	63 root.scrollTop = 150;

64 runTestCycle(step2, "root.scrollTop = 150 with root scrolled into view.");	64 runTestCycle(step2, "root.scrollTop = 150 with root scrolled into view.");

65 assert_equals(entries.length, 0, "No notifications after scrolling frame.");	65 assert_equals(entries.length, 1, "No notifications after scrolling frame.");

66 }	66 }

67	67

68 function step2() {	68 function step2() {

69 document.scrollingElement.scrollTop = 0;	69 document.scrollingElement.scrollTop = 0;

70 runTestCycle(step3, "document.scrollingElement.scrollTop = 0.");	70 runTestCycle(step3, "document.scrollingElement.scrollTop = 0.");

71 checkLastEntry(entries, 0, [11, 111, 261, 361, 11, 111, 261, 311, 11, 111, 111 , 311, target]);	71 checkLastEntry(entries, 1, [11, 111, 261, 361, 11, 111, 261, 311, 11, 111, 111 , 311, target]);

72 }	72 }

73	73

74 function step3() {	74 function step3() {

75 root.scrollTop = 0;	75 root.scrollTop = 0;

76 runTestCycle(step4, "root.scrollTop = 0");	76 runTestCycle(step4, "root.scrollTop = 0");

77 checkLastEntry(entries, 0);	77 checkLastEntry(entries, 1);

78 }	78 }

79	79

80 function step4() {	80 function step4() {

81 root.scrollTop = 150;	81 root.scrollTop = 150;

82 runTestCycle(step5, "root.scrollTop = 150 with root scrolled out of view.");	82 runTestCycle(step5, "root.scrollTop = 150 with root scrolled out of view.");

83 checkLastEntry(entries, 1, [11, 111, 1011, 1111, 0, 0, 0, 0, 11, 111, 711, 911 , target]);	83 checkLastEntry(entries, 2, [11, 111, 1011, 1111, 0, 0, 0, 0, 11, 111, 711, 911 , target]);

84 }	84 }

85	85

86 // This tests that notifications are generated even when the root element is off screen.	86 // This tests that notifications are generated even when the root element is off screen.

87 function step5() {	87 function step5() {

88 checkLastEntry(entries, 2, [11, 111, 861, 961, 11, 111, 861, 911, 11, 111, 711 , 911, target]);	88 checkLastEntry(entries, 3, [11, 111, 861, 961, 11, 111, 861, 911, 11, 111, 711 , 911, target]);

89 }	89 }

90 </script>	90 </script>

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