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1 <!DOCTYPE html> | |
2 <html> | |
3 <head> | |
4 <meta charset="utf-8"> | |
5 <title>ScrollState constructor behaves correctly</title> | |
6 <script src="../../../resources/testharness.js"></script> | |
7 <script src="../../../resources/testharnessreport.js"></script> | |
8 </head> | |
9 <body> | |
10 <script> | |
11 test(function() { | |
12 assert_true('ScrollState' in window, "'ScrollState' in window"); | |
13 // TODO(tdresser): Don't rely on window.internals. See crbug.com/483091 for de
tails. | |
14 assert_true(window.internals !== null, "'ScrollState' in window"); | |
15 }, "These tests only work with scroll customization enabled."); | |
16 | |
17 var elementCount = 10; | |
18 var remainingNumberOfTimesToBeCalled = elementCount; | |
19 | |
20 var distributeScroll = function(scrollState) { | |
21 this.calledOrder = elementCount - remainingNumberOfTimesToBeCalled; | |
22 remainingNumberOfTimesToBeCalled--; | |
23 scrollState.distributeToScrollChainDescendant(); | |
24 } | |
25 | |
26 var elements = []; | |
27 for (var i = 0; i < elementCount; ++i) { | |
28 var element = document.createElement("div"); | |
29 element.creationOrder = i; | |
30 element.setDistributeScroll(distributeScroll.bind(element), "disable-native-sc
roll"); | |
31 elements.push(element); | |
32 } | |
33 | |
34 if ('ScrollState' in window && window.internals) { | |
35 test(function() { | |
36 var scrollState = new ScrollState(100, 0, 0, 0, 0, false, false); | |
37 window.internals.setScrollChain(scrollState, elements); | |
38 scrollState.distributeToScrollChainDescendant(); | |
39 assert_equals(0, remainingNumberOfTimesToBeCalled); | |
40 for (var i = 0; i < elementCount; ++i) { | |
41 assert_equals(elements[i].creationOrder, elements[i].calledOrder); | |
42 } | |
43 }, "distributeToScrollChainDescendant propagates correctly."); | |
44 | |
45 test(function() { | |
46 var scrollState = new ScrollState(100, 0, 0, 0, 0, false, false); | |
47 window.internals.setScrollChain(scrollState, []); | |
48 assert_equals(0, remainingNumberOfTimesToBeCalled); | |
49 scrollState.distributeToScrollChainDescendant(); | |
50 assert_equals(0, remainingNumberOfTimesToBeCalled); | |
51 }, "distributeToScrollChainDescendant with empty scroll chain does nothing."); | |
52 } | |
53 </script> | |
54 </body> | |
55 </html> | |
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