| <!DOCTYPE html> |
| <script src="../../../../../resources/js-test.js"></script> |
| <style> |
| body { |
| width: 2000px; |
| height: 2000px; |
| } |
| </style> |
| |
| <script> |
| var jsTestIsAsync = true; |
| |
| description("This test verifies that smooth scrolls initiated on the main " + |
| "thread add the appropriate main thread scrolling reason."); |
| |
| // From ScrollingCoordinator::mainThreadScrollingReasonsAsText. |
| var ANIMATING_TEXT = "Handling scroll from main thread"; |
| var IDLE = "Idle"; |
| var RUNNING_ON_COMPOSITOR = "RunningOnCompositor"; |
| |
| function finishTest() { |
| requestAnimationFrame(function() { |
| shouldBe("document.scrollingElement.scrollTop", "40"); |
| // Check that main thread scrolling reason is removed. |
| shouldBeTrue("internals.mainThreadScrollingReasons(document) == ''"); |
| finishJSTest(); |
| }); |
| } |
| |
| function runTest() { |
| if (document.scrollingElement.scrollTop == 0) { |
| requestAnimationFrame(runTest); |
| } else { |
| // Check that initiated by main thread and running on the compositor. |
| shouldBe("internals.getScrollAnimationState(document)", |
| "RUNNING_ON_COMPOSITOR"); |
| // Check that main thread scrolling reason is added. |
| shouldBe("internals.mainThreadScrollingReasons(document)", |
| "ANIMATING_TEXT"); |
| // Wait for scroll animation to complete. |
| shouldBecomeEqual("internals.getScrollAnimationState(document)", |
| "IDLE", finishTest); |
| } |
| } |
| |
| onload = function() { |
| if (!window.eventSender || !window.internals) { |
| debug("This test requires window.eventSender.") |
| finishJSTest(); |
| return; |
| } |
| internals.settings.setScrollAnimatorEnabled(true); |
| |
| document.scrollingElement.scrollTop = 0; |
| |
| // Scroll 1 ticks down. |
| eventSender.mouseMoveTo(20, 20); |
| eventSender.mouseScrollBy(0, -1); |
| runTest(); |
| }; |
| |
| </script> |
