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Status: Assigned
Owner:
Cc:
Components:
EstimatedDays: ----
NextAction: ----
OS: ----
Pri: 2
Type: Bug

Blocking:
issue 836886



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[BGPT] Some virtual/threaded pinch zoom tests are flaky

Project Member Reported by wangxianzhu@chromium.org, Sep 11

Issue description

Sample failures:
https://test-results.appspot.com/data/layout_results/linux-blink-gen-property-trees/451/layout-test-results/results.html
https://test-results.appspot.com/data/layout_results/linux-blink-gen-property-trees/446/layout-test-results/results.html

FAIL Touchpad pinch can be prevented by wheel handlers assert_approx_equals: expected 2 +/- 0.001 but got 1.1382160186767578

Layout tests:
virtual/threaded/synthetic_gestures/synthetic-pinch-zoom-gesture-touchpad.html
virtual/threaded/fast/events/pinch/gesture-pinch-zoom-prevent-in-handler.html
virtual/threaded/fast/events/pinch/scroll-visual-viewport-send-boundary-events.html

 
Project Member

Comment 1 by bugdroid1@chromium.org, Sep 11

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/6eee601005702561b7d73cc2e7b93ac311071a5b

commit 6eee601005702561b7d73cc2e7b93ac311071a5b
Author: Xianzhu Wang <wangxianzhu@chromium.org>
Date: Tue Sep 11 19:46:59 2018

[BGPT] Update FlagExpectations/enable-blink-gen-property-trees

Bug:  882973 , 882974 ,882975
Change-Id: If63c4f260a11360f2044dc94a14fea20c2133ac4
Cq-Include-Trybots: luci.chromium.try:linux-blink-gen-property-trees
Reviewed-on: https://chromium-review.googlesource.com/1220467
Reviewed-by: Philip Rogers <pdr@chromium.org>
Commit-Queue: Xianzhu Wang <wangxianzhu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#590443}
[modify] https://crrev.com/6eee601005702561b7d73cc2e7b93ac311071a5b/third_party/WebKit/LayoutTests/FlagExpectations/enable-blink-gen-property-trees

Components: Blink>Scroll
Owner: sahel@chromium.org
Sahel, would you be able to look at these tests, particularly virtual/threaded/synthetic_gestures/synthetic-pinch-zoom-gesture-touchpad.html? This is failing when run with --additional-driver-flag=--enable-blink-gen-property-trees.
Status: Assigned (was: Available)
Sure, I will investigate.
Project Member

Comment 4 by bugdroid1@chromium.org, Yesterday (39 hours ago)

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/08aed290f42041ab29fc82ef6e127c33e2871b47

commit 08aed290f42041ab29fc82ef6e127c33e2871b47
Author: Kevin McNee <mcnee@chromium.org>
Date: Mon Jan 21 18:02:07 2019

Address flaky desktop touchscreen synthetic pinch zoom gesture tests

The lenient versions of these tests were missing a call to
waitForCompositorCommit after the gesture which the full versions of
the tests have.

We also clean up the TestExpectations for these synthetic_gestures tests
as some of the entries appear to no longer be an issue.

Bug: 922508,  787615 , 891427, 882975
Change-Id: Idf084b3651e74bbbfc337a73ba8223aa8db8d3a3
Reviewed-on: https://chromium-review.googlesource.com/c/1418522
Reviewed-by: David Bokan <bokan@chromium.org>
Commit-Queue: Kevin McNee <mcnee@chromium.org>
Cr-Commit-Position: refs/heads/master@{#624613}
[modify] https://crrev.com/08aed290f42041ab29fc82ef6e127c33e2871b47/third_party/blink/web_tests/TestExpectations
[modify] https://crrev.com/08aed290f42041ab29fc82ef6e127c33e2871b47/third_party/blink/web_tests/virtual/threaded/synthetic_gestures/synthetic-pinch-zoom-gesture.js

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