LayoutTests/fast/events/wheelevent-handler-count.html - Issue 206603002: Add EventHandlerRegistry

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Issue 206603002: Add EventHandlerRegistry (Closed) Base URL: https://chromium.googlesource.com/chromium/blink.git@master

Patch Set: Add test for external handlers. Created 6 years, 8 months ago

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« LayoutTests/fast/events/event-handler-count.html ('K') | « LayoutTests/fast/events/touch/touch-handler-count-expected.txt ('k') | LayoutTests/fast/events/wheelevent-handler-count-expected.txt » ('j') | Source/core/page/scrolling/ScrollingCoordinator.cpp » ('J')
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1 <script src="../../resources/js-test.js"></script>

2 <script>

3 description("This test checks that we correctly update the wheel event handler c ount as event handlers are added and removed");

4

5 (function() {

6 // Test addEventListener/removeEventListener on the document.

7 var listener = function() { }

8

9 shouldBe('window.internals.wheelEventHandlerCount(document)', '0');

10 document.addEventListener('mousewheel', listener, true);

11 shouldBe('window.internals.wheelEventHandlerCount(document)', '1');

12 document.addEventListener('mousewheel', listener, false);

13 shouldBe('window.internals.wheelEventHandlerCount(document)', '2');

14 document.removeEventListener('mousewheel', listener, true);

15 shouldBe('window.internals.wheelEventHandlerCount(document)', '1');

16

17 // Try removing the capturing listener again.

18 document.removeEventListener('mousewheel', listener, true);

19 shouldBe('window.internals.wheelEventHandlerCount(document)', '1');

20

21 document.removeEventListener('mousewheel', listener, false);

22 shouldBe('window.internals.wheelEventHandlerCount(document)', '0');

23 })();

24

25 (function() {

26 // Test setting onmousewheel on the document.

27

28 shouldBe('window.internals.wheelEventHandlerCount(document)', '0');

29 document.onmousewheel = function() { }

30 shouldBe('window.internals.wheelEventHandlerCount(document)', '1');

31 document.onmousewheel = function() { }

32 shouldBe('window.internals.wheelEventHandlerCount(document)', '1');

33 document.onmousewheel = null;

34 shouldBe('window.internals.wheelEventHandlerCount(document)', '0');

35 })();

36

37 (function() {

38 // Test addEventListener/removeEventListener on the window.

39 var listener = function() { }

40

41 shouldBe('window.internals.wheelEventHandlerCount(document)', '0');

42 window.addEventListener('mousewheel', listener, true);

43 shouldBe('window.internals.wheelEventHandlerCount(document)', '1');

44 window.addEventListener('mousewheel', listener, false);

45 shouldBe('window.internals.wheelEventHandlerCount(document)', '2');

46 window.removeEventListener('mousewheel', listener, true);

47 shouldBe('window.internals.wheelEventHandlerCount(document)', '1');

48

49 // Try removing the capturing listener again.

50 window.removeEventListener('mousewheel', listener, true);

51 shouldBe('window.internals.wheelEventHandlerCount(document)', '1');

52

53 window.removeEventListener('mousewheel', listener, false);

54 shouldBe('window.internals.wheelEventHandlerCount(document)', '0');

55 })();

56

57 (function() {

58 // Test setting onmousewheel on the window.

59 shouldBe('window.internals.wheelEventHandlerCount(document)', '0');

60 window.onmousewheel = function() { }

61 shouldBe('window.internals.wheelEventHandlerCount(document)', '1');

62 window.onmousewheel = function() { }

63 shouldBe('window.internals.wheelEventHandlerCount(document)', '1');

64 window.onmousewheel = null;

65 shouldBe('window.internals.wheelEventHandlerCount(document)', '0');

66 })();

67

68 </script>

69 </body>

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