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Fix flakiness in FlutterVSyncWaiterTest.VSyncWorks and FlutterDisplayLinkTest.WorkaroundForFB13482573 #51405

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merged 2 commits into from
Mar 14, 2024

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@knopp knopp commented Mar 14, 2024

  • Removes potential source of flakiness where the tests assumes that scheduled block will be performed within certain time period, which, despite the tolerances may not be the case on test runner.

  • Ensures that viewDidChangeWindow notification is not received while invalidating the displayLink and removing the display link view, which could deadlock at the end of WorkaroundForFB13482573 test because the notification would come while FlutterDisplayLink is in @synchronized block.

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@knopp knopp changed the title Fix FlutterVSyncWaiterTest.VSyncWorks flakyness Fix FlutterVSyncWaiterTest.VSyncWorks flakiness Mar 14, 2024
@knopp knopp requested a review from cbracken March 14, 2024 05:53
@knopp knopp changed the title Fix FlutterVSyncWaiterTest.VSyncWorks flakiness Fix FlutterVSyncWaiterTest.VSyncWorks and FlutterDisplayLinkTest.WorkaroundForFB13482573 flakiness Mar 14, 2024
@knopp knopp requested a review from loic-sharma March 14, 2024 06:03
@knopp knopp changed the title Fix FlutterVSyncWaiterTest.VSyncWorks and FlutterDisplayLinkTest.WorkaroundForFB13482573 flakiness Fix flakiness in FlutterVSyncWaiterTest.VSyncWorks and FlutterDisplayLinkTest.WorkaroundForFB13482573 Mar 14, 2024
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Thanks for following-up so quickly!

@knopp knopp merged commit 8f49b4a into flutter:main Mar 14, 2024
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@knopp knopp deleted the fix_flaky_test branch March 14, 2024 21:00
engine-flutter-autoroll added a commit to engine-flutter-autoroll/flutter that referenced this pull request Mar 15, 2024
auto-submit bot pushed a commit to flutter/flutter that referenced this pull request Mar 15, 2024
…145191)

flutter/engine@622b372...995d890

2024-03-14 matanlurey@users.noreply.github.com Add some header-goodies for et. (flutter/engine#51434)
2024-03-14 jonahwilliams@google.com [Impeller] revert glyph atlas texture recycling. (flutter/engine#51428)
2024-03-14 98614782+auto-submit[bot]@users.noreply.github.com Reverts "Add DisplayList Region and Transform benchmarks to CI (#51429)" (flutter/engine#51432)
2024-03-14 flar@google.com Add DisplayList Region and Transform benchmarks to CI (flutter/engine#51429)
2024-03-14 skia-flutter-autoroll@skia.org Roll Dart SDK from 2bc8b222d01f to 70ca2323a702 (1 revision) (flutter/engine#51430)
2024-03-14 matanlurey@users.noreply.github.com Reduce code-duplication a bit and add more error context across `SkiaGoldClient`. (flutter/engine#51426)
2024-03-14 zanderso@users.noreply.github.com [et] build and run commands disable RBE with a flag or when not available (flutter/engine#51404)
2024-03-14 matej.knopp@gmail.com Fix flakiness in FlutterVSyncWaiterTest.VSyncWorks and FlutterDisplayLinkTest.WorkaroundForFB13482573 (flutter/engine#51405)

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
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Please CC bdero@google.com,rmistry@google.com,zra@google.com on the revert to ensure that a human
is aware of the problem.

To file a bug in Flutter: https://github.com/flutter/flutter/issues/new/choose

To report a problem with the AutoRoller itself, please file a bug:
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Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+doc/main/autoroll/README.md
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Thanks for landing this -- apologies, out on holiday at the moment!

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