| <!DOCTYPE html> |
| |
| <html> |
| <head> |
| <script src="../../../resources/js-test-pre.js"></script> |
| <title>Repeated mouse-wheel scrolling does not scroll to top of page</title> |
| <style> |
| body { |
| margin: 0; |
| height: 5000px; |
| } |
| </style> |
| </head> |
| <body> |
| </body> |
| <script> |
| var wheelTick = 40; |
| var expectedMinimum; |
| var expectedScrollTop; |
| var testsPassed = 0; |
| var testDescription; |
| |
| function triggerNextTest() { |
| if (testsPassed) |
| debug("PASS " + testDescription); |
| |
| switch (testsPassed) { |
| case 0: |
| testDescription = "Scroll downwards by 1 tick" |
| expectedMinimum = 0; |
| expectedScrollTop = wheelTick; |
| eventSender.mouseScrollBy(0, -1); |
| return; |
| |
| case 1: |
| testDescription = "Scroll downwards by another tick" |
| expectedMinimum = expectedScrollTop; |
| expectedScrollTop = wheelTick * 2; |
| eventSender.mouseScrollBy(0, -1); |
| return; |
| |
| case 2: |
| testDescription = "Scroll downwards by two more ticks, interrupting the first" |
| expectedMinimum = expectedScrollTop; |
| expectedScrollTop = wheelTick * 4; |
| eventSender.mouseScrollBy(0, -1); |
| eventSender.mouseScrollBy(0, -1); |
| return; |
| } |
| |
| isSuccessfullyParsed(); |
| testRunner.notifyDone(); |
| |
| return; |
| } |
| |
| function scrollEventCallback() { |
| if (document.scrollingElement.scrollTop < expectedMinimum) |
| debug("FAIL Repeated mouse-wheel scrolling doesn't go backwards"); |
| if (document.scrollingElement.scrollTop == expectedScrollTop) { |
| ++testsPassed; |
| if (window.testRunner) |
| triggerNextTest(); |
| } |
| } |
| |
| |
| document.addEventListener("scroll", scrollEventCallback, false); |
| |
| if (window.testRunner) { |
| testRunner.waitUntilDone(); |
| } |
| |
| if (window.eventSender) { |
| triggerNextTest(); |
| } |
| </script> |
| </html> |
