LayoutTests/fast/events/scroll-event-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/event-handler-count-expected.txt ('k') | LayoutTests/fast/events/scroll-event-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 scroll event handler count 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.scrollEventHandlerCount(document)', '0');

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

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

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

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

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

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

	16

	17 // Try removing the capturing listener again.

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

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

	20

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

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

	23 })();

	24

	25 (function() {

	26 // Test setting onscroll on the document.

	27

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

	29 document.onscroll = function() { }

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

	31 document.onscroll = function() { }

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

	33 document.onscroll = null;

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

	35 })();

	36

	37 (function() {

	38 // Test addEventListener/removeEventListener on the window.

	39 var listener = function() { }

	40

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

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

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

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

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

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

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

	48

	49 // Try removing the capturing listener again.

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

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

	52

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

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

	55 })();

	56

	57 (function() {

	58 // Test setting onscroll on the window.

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

	60 window.onscroll = function() { }

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

	62 window.onscroll = function() { }

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

	64 window.onscroll = null;

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

	66 })();

	67

	68 </script>

	69 </body>

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