| <!DOCTYPE html> |
| <title>Tests mouse autoscroll when scrollbar is dynamically deleted.</title> |
| <script src="../../../resources/testharness.js"></script> |
| <script src="../../../resources/testharnessreport.js"></script> |
| <script src="../../../resources/gesture-util.js"></script> |
| <script src="../../../resources/scrollbar-util.js"></script> |
| <div id="content" style="height: 10000px; width: 10000px; border: 1px solid;"></div> |
| <script> |
| function resetScroller() { |
| window.removeEventListener("scroll", shortenHorizontalScroller); |
| window.removeEventListener("scroll", shortenVerticalScroller); |
| window.scrollTo(0, 0); |
| document.getElementById("content").style.width = "10000px"; |
| document.getElementById("content").style.height = "10000px"; |
| document.documentElement.style.overflowX = "visible"; |
| document.documentElement.style.overflowY = "visible"; |
| } |
| |
| function shortenHorizontalScroller() { |
| document.getElementById("content").style.width = "10px"; |
| } |
| |
| |
| function shortenVerticalScroller() { |
| document.getElementById("content").style.height = "10px"; |
| } |
| |
| // When pointerdown occurs, an autoscroll task gets scheduled to be |
| // executed after 250ms. This code checks that the renderer doesn't |
| // crash when the scrollbar is dynamically deleted while an auto |
| // scroll task is scheduled. |
| promise_test (async () => { |
| resetScroller(); |
| assert_equals(document.documentElement.style.overflowY, "visible", |
| "Scroller is expected to be scrollable in the Y direction"); |
| |
| window.addEventListener("scroll", shortenVerticalScroller); |
| await mousePressOn(downArrow().x, downArrow().y, 300); |
| |
| assert_equals(document.getElementById("content").style.height, "10px", |
| "Scroller height should have been reduced to 10px."); |
| },"Test same-axis autoscroll when vertical scrollbar deleted."); |
| |
| promise_test (async () => { |
| resetScroller(); |
| assert_equals(document.documentElement.style.overflowY, "visible", |
| "Scroller is expected to be scrollable in the Y direction"); |
| |
| window.addEventListener("scroll", shortenHorizontalScroller); |
| await mousePressOn(downArrow().x, downArrow().y, 300); |
| |
| assert_equals(document.getElementById("content").style.width, "10px", |
| "Scroller width should have been reduced to 10px."); |
| },"Test cross-axis autoscroll when vertical scrollbar deleted."); |
| </script> |
