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Add calls to await flutterDriver.waitUntilFirstFrameRasterized() for all android_engine_test screenshot tests#182961

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gmackall:wait_for_first_frame
Feb 26, 2026
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Add calls to await flutterDriver.waitUntilFirstFrameRasterized() for all android_engine_test screenshot tests#182961
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@gmackall gmackall commented Feb 26, 2026

Speculative fix for flakes where we see a full black screen image in the golden tests from time to time (for example). I don't have solid proof, but I've only ever seen those cases happen in this set of tests, which all are missing a call to flutterDriver.waitUntilFirstFrameRasterized().

Even if the change doesn't fix the problem, it abstractly makes more sense to me to wait for the first frame to be rasterized before we go off trying to screenshot anything anyways, so I would not regret this change even if it does nothing.

@gmackall gmackall marked this pull request as ready for review February 26, 2026 20:22
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Code Review

This pull request modifies six integration test files by adding await flutterDriver.waitUntilFirstFrameRasterized(); within the setUpAll block of each test. This change ensures that the Flutter application's first frame has been rendered before the tests proceed, which is particularly important for screenshot testing or other UI-dependent operations. There were no review comments provided for these changes.

@gmackall gmackall changed the title Add calls to await flutterDriver.waitUntilFirstFrameRasterized() for all android_engine_test screenshot tests Add calls to await flutterDriver.waitUntilFirstFrameRasterized() for all android_engine_test screenshot tests Feb 26, 2026
@gmackall gmackall requested a review from a team February 26, 2026 20:28
@gmackall gmackall added the autosubmit Merge PR when tree becomes green via auto submit App label Feb 26, 2026
@auto-submit auto-submit Bot added this pull request to the merge queue Feb 26, 2026
Merged via the queue into flutter:master with commit aa17303 Feb 26, 2026
153 checks passed
@flutter-dashboard flutter-dashboard Bot removed the autosubmit Merge PR when tree becomes green via auto submit App label Feb 26, 2026
ahmedsameha1 pushed a commit to ahmedsameha1/flutter that referenced this pull request Feb 27, 2026
…r all `android_engine_test` screenshot tests (flutter#182961)

Speculative fix for flakes where we see a full black screen image in the
golden tests from time to time ([for
example](https://flutter-gold.skia.org/detail?grouping=name%3Dandroid_engine_test.vulkan.platform_view_tap_color_change_initial%26source_type%3Dflutter&digest=5ba6df7acef516f7dab78587cf30ce20)).
I don't have solid proof, but I've only ever seen those cases happen in
this set of tests, which all are missing a call to
`flutterDriver.waitUntilFirstFrameRasterized()`.

Even if the change doesn't fix the problem, it abstractly makes more
sense to me to wait for the first frame to be rasterized before we go
off trying to screenshot anything anyways, so I would not regret this
change even if it does nothing.

Co-authored-by: Gray Mackall <mackall@google.com>
engine-flutter-autoroll added a commit to engine-flutter-autoroll/packages that referenced this pull request Feb 27, 2026
engine-flutter-autoroll added a commit to engine-flutter-autoroll/packages that referenced this pull request Feb 27, 2026
auto-submit Bot pushed a commit to flutter/packages that referenced this pull request Feb 27, 2026
Roll Flutter from b31548feb941 to 1141b2bdce66 (56 revisions)

flutter/flutter@b31548f...1141b2b

2026-02-27 maxime.pontoire@me.com flutter#182361 Fix delegate copy on plugins init (flutter/flutter#182362)
2026-02-27 engine-flutter-autoroll@skia.org Roll Dart SDK from 8b036b3e63cb to 1cdb7dfd913e (1 revision) (flutter/flutter#183004)
2026-02-27 vegorov@google.com Manual roll Dart SDK to 3.12.0-192.0.dev (flutter/flutter#182883)
2026-02-27 engine-flutter-autoroll@skia.org Roll Skia from e2062707b0c0 to ed220c490eea (1 revision) (flutter/flutter#182992)
2026-02-27 engine-flutter-autoroll@skia.org Roll Skia from e5aa1ab5c59c to e2062707b0c0 (3 revisions) (flutter/flutter#182989)
2026-02-27 oss@simonbinder.eu Linux build hooks: Read compiler config from CMakeCache.txt (flutter/flutter#181004)
2026-02-27 engine-flutter-autoroll@skia.org Roll ICU from a86a32e67b8d to 7971660ba630 (3 revisions) (flutter/flutter#182986)
2026-02-27 engine-flutter-autoroll@skia.org Roll Skia from 49c2de95384e to e5aa1ab5c59c (2 revisions) (flutter/flutter#182980)
2026-02-27 flar@google.com [Impeller] Remove shared rendering data from TextFrame (flutter/flutter#182886)
2026-02-27 robert.ancell@canonical.com Add fl_view_new_sized_to_content() (flutter/flutter#182924)
2026-02-27 737941+loic-sharma@users.noreply.github.com [Shortcuts] Improve focus node debug labels (flutter/flutter#181834)
2026-02-27 34871572+gmackall@users.noreply.github.com Add a cli flag for toggling HCPP use, and enable it (flutter/flutter#182516)
2026-02-27 nate.w5687@gmail.com `SizedBox.square()` (flutter/flutter#182731)
2026-02-27 1961493+harryterkelsen@users.noreply.github.com [web] Fix stack corruption in Skwasm and harden withStackScope API (flutter/flutter#182912)
2026-02-26 jason-simmons@users.noreply.github.com Roll zlib to 7eda07b1e067 (flutter/flutter#182692)
2026-02-26 bkonyi@google.com [ CI ] Don't crash analysis when ktlint isn't on PATH (flutter/flutter#181854)
2026-02-26 34871572+gmackall@users.noreply.github.com Add calls to await `flutterDriver.waitUntilFirstFrameRasterized()` for all `android_engine_test` screenshot tests (flutter/flutter#182961)
2026-02-26 engine-flutter-autoroll@skia.org Roll Skia from f44d7db68805 to 49c2de95384e (30 revisions) (flutter/flutter#182957)
2026-02-26 robert.ancell@canonical.com Support sending window constraints in metrics events (flutter/flutter#182921)
2026-02-26 34465683+rkishan516@users.noreply.github.com Reland: remove material in context_menu_controller_test, icon_test, list_wheel_scroll_view_test, media_query_test, platform_menu_bar_test (flutter/flutter#182891)
2026-02-26 116356835+AbdeMohlbi@users.noreply.github.com Remove some instances of useMaterial3: true (flutter/flutter#182944)
2026-02-26 serhatguler@hotmail.de [Impeller] Use bilinear filtering for non-uniform scaled text (flutter/flutter#182224)
2026-02-26 chingjun@google.com Add a ResidentCompilerFactory to create ResidentCompiler instances. (flutter/flutter#182930)
2026-02-26 chingjun@google.com Add a getter in run.dart to access use-application-binary flag. (flutter/flutter#182931)
2026-02-26 mdebbar@google.com [web] Roll Firefox to 148 (flutter/flutter#182859)
2026-02-26 engine-flutter-autoroll@skia.org Roll Packages from acd9adb to e1d0169 (8 revisions) (flutter/flutter#182946)
2026-02-26 engine-flutter-autoroll@skia.org Roll Fuchsia Linux SDK from XI0Ax7fbtYE4XKYAQ... to G1GwOdVt5bM7GjMSY... (flutter/flutter#182942)
2026-02-26 robert.ancell@canonical.com Add test for WindowPositioner.toString (flutter/flutter#182906)
2026-02-26 robert.ancell@canonical.com Remove unused function prototype (flutter/flutter#182915)
2026-02-26 ahmedsameha1@gmail.com Resolve inconsistency with SchedulerBinding.scheduleTask usage recomm… (flutter/flutter#182531)
2026-02-26 51901607+O-Hannonen@users.noreply.github.com Fix false positives for hit test misses in flutter_test (flutter/flutter#180856)
2026-02-26 116356835+AbdeMohlbi@users.noreply.github.com Replace an instance of flutter/engine with flutter/flutter (flutter/flutter#182655)
2026-02-26 146823759+brahim-guaali@users.noreply.github.com Use null-aware elements in widgets/routes.dart (flutter/flutter#181242)
2026-02-26 37593616+itsAdityaRathore@users.noreply.github.com Fix typos in method names across multiple files (flutter/flutter#182584)
2026-02-26 brunocorona.alcantar@gmail.com Fix RawAutocomplete crash when options are hidden (flutter/flutter#182785)
2026-02-26 flar@google.com Describe implications of tree-status and Google Testing for PRs (flutter/flutter#182916)
2026-02-26 ahmedsameha1@gmail.com Make sure that a StretchingOverscrollIndicator doesn't crash when it … (flutter/flutter#182499)
2026-02-26 srawlins@google.com framework: Use a super-parameter in several missed cases (flutter/flutter#182580)
2026-02-25 nate.w5687@gmail.com `WidgetStatesConstraint` as a mixin (flutter/flutter#181704)
2026-02-25 Rusino@users.noreply.github.com Paint the paragraph as a single image (flutter/flutter#181206)
2026-02-25 rmolivares@renzo-olivares.dev Remove `ExtendSelectionByPageIntent` (flutter/flutter#182642)
2026-02-25 34465683+rkishan516@users.noreply.github.com feat: add few required properties to test widgets app (flutter/flutter#182805)
2026-02-25 prbillingsley89@gmail.com Updates MenuAnchor to respect software keyboard (flutter/flutter#180975)
2026-02-25 jason-simmons@users.noreply.github.com Roll ImGui to v1.92.6-docking (flutter/flutter#182799)
2026-02-25 jason-simmons@users.noreply.github.com Roll GoogleTest to e9907112b472 (flutter/flutter#182795)
2026-02-25 Veselblu@yandex.ru Make positionInlineChildren assert much clearer (flutter/flutter#182093)
...
xxxOVALxxx pushed a commit to xxxOVALxxx/flutter that referenced this pull request Mar 10, 2026
…r all `android_engine_test` screenshot tests (flutter#182961)

Speculative fix for flakes where we see a full black screen image in the
golden tests from time to time ([for
example](https://flutter-gold.skia.org/detail?grouping=name%3Dandroid_engine_test.vulkan.platform_view_tap_color_change_initial%26source_type%3Dflutter&digest=5ba6df7acef516f7dab78587cf30ce20)).
I don't have solid proof, but I've only ever seen those cases happen in
this set of tests, which all are missing a call to
`flutterDriver.waitUntilFirstFrameRasterized()`.

Even if the change doesn't fix the problem, it abstractly makes more
sense to me to wait for the first frame to be rasterized before we go
off trying to screenshot anything anyways, so I would not regret this
change even if it does nothing.

Co-authored-by: Gray Mackall <mackall@google.com>
okorohelijah pushed a commit to okorohelijah/packages that referenced this pull request Mar 26, 2026
…r#11137)

Roll Flutter from b31548feb941 to 1141b2bdce66 (56 revisions)

flutter/flutter@b31548f...1141b2b

2026-02-27 maxime.pontoire@me.com flutter#182361 Fix delegate copy on plugins init (flutter/flutter#182362)
2026-02-27 engine-flutter-autoroll@skia.org Roll Dart SDK from 8b036b3e63cb to 1cdb7dfd913e (1 revision) (flutter/flutter#183004)
2026-02-27 vegorov@google.com Manual roll Dart SDK to 3.12.0-192.0.dev (flutter/flutter#182883)
2026-02-27 engine-flutter-autoroll@skia.org Roll Skia from e2062707b0c0 to ed220c490eea (1 revision) (flutter/flutter#182992)
2026-02-27 engine-flutter-autoroll@skia.org Roll Skia from e5aa1ab5c59c to e2062707b0c0 (3 revisions) (flutter/flutter#182989)
2026-02-27 oss@simonbinder.eu Linux build hooks: Read compiler config from CMakeCache.txt (flutter/flutter#181004)
2026-02-27 engine-flutter-autoroll@skia.org Roll ICU from a86a32e67b8d to 7971660ba630 (3 revisions) (flutter/flutter#182986)
2026-02-27 engine-flutter-autoroll@skia.org Roll Skia from 49c2de95384e to e5aa1ab5c59c (2 revisions) (flutter/flutter#182980)
2026-02-27 flar@google.com [Impeller] Remove shared rendering data from TextFrame (flutter/flutter#182886)
2026-02-27 robert.ancell@canonical.com Add fl_view_new_sized_to_content() (flutter/flutter#182924)
2026-02-27 737941+loic-sharma@users.noreply.github.com [Shortcuts] Improve focus node debug labels (flutter/flutter#181834)
2026-02-27 34871572+gmackall@users.noreply.github.com Add a cli flag for toggling HCPP use, and enable it (flutter/flutter#182516)
2026-02-27 nate.w5687@gmail.com `SizedBox.square()` (flutter/flutter#182731)
2026-02-27 1961493+harryterkelsen@users.noreply.github.com [web] Fix stack corruption in Skwasm and harden withStackScope API (flutter/flutter#182912)
2026-02-26 jason-simmons@users.noreply.github.com Roll zlib to 7eda07b1e067 (flutter/flutter#182692)
2026-02-26 bkonyi@google.com [ CI ] Don't crash analysis when ktlint isn't on PATH (flutter/flutter#181854)
2026-02-26 34871572+gmackall@users.noreply.github.com Add calls to await `flutterDriver.waitUntilFirstFrameRasterized()` for all `android_engine_test` screenshot tests (flutter/flutter#182961)
2026-02-26 engine-flutter-autoroll@skia.org Roll Skia from f44d7db68805 to 49c2de95384e (30 revisions) (flutter/flutter#182957)
2026-02-26 robert.ancell@canonical.com Support sending window constraints in metrics events (flutter/flutter#182921)
2026-02-26 34465683+rkishan516@users.noreply.github.com Reland: remove material in context_menu_controller_test, icon_test, list_wheel_scroll_view_test, media_query_test, platform_menu_bar_test (flutter/flutter#182891)
2026-02-26 116356835+AbdeMohlbi@users.noreply.github.com Remove some instances of useMaterial3: true (flutter/flutter#182944)
2026-02-26 serhatguler@hotmail.de [Impeller] Use bilinear filtering for non-uniform scaled text (flutter/flutter#182224)
2026-02-26 chingjun@google.com Add a ResidentCompilerFactory to create ResidentCompiler instances. (flutter/flutter#182930)
2026-02-26 chingjun@google.com Add a getter in run.dart to access use-application-binary flag. (flutter/flutter#182931)
2026-02-26 mdebbar@google.com [web] Roll Firefox to 148 (flutter/flutter#182859)
2026-02-26 engine-flutter-autoroll@skia.org Roll Packages from acd9adb to e1d0169 (8 revisions) (flutter/flutter#182946)
2026-02-26 engine-flutter-autoroll@skia.org Roll Fuchsia Linux SDK from XI0Ax7fbtYE4XKYAQ... to G1GwOdVt5bM7GjMSY... (flutter/flutter#182942)
2026-02-26 robert.ancell@canonical.com Add test for WindowPositioner.toString (flutter/flutter#182906)
2026-02-26 robert.ancell@canonical.com Remove unused function prototype (flutter/flutter#182915)
2026-02-26 ahmedsameha1@gmail.com Resolve inconsistency with SchedulerBinding.scheduleTask usage recomm… (flutter/flutter#182531)
2026-02-26 51901607+O-Hannonen@users.noreply.github.com Fix false positives for hit test misses in flutter_test (flutter/flutter#180856)
2026-02-26 116356835+AbdeMohlbi@users.noreply.github.com Replace an instance of flutter/engine with flutter/flutter (flutter/flutter#182655)
2026-02-26 146823759+brahim-guaali@users.noreply.github.com Use null-aware elements in widgets/routes.dart (flutter/flutter#181242)
2026-02-26 37593616+itsAdityaRathore@users.noreply.github.com Fix typos in method names across multiple files (flutter/flutter#182584)
2026-02-26 brunocorona.alcantar@gmail.com Fix RawAutocomplete crash when options are hidden (flutter/flutter#182785)
2026-02-26 flar@google.com Describe implications of tree-status and Google Testing for PRs (flutter/flutter#182916)
2026-02-26 ahmedsameha1@gmail.com Make sure that a StretchingOverscrollIndicator doesn't crash when it … (flutter/flutter#182499)
2026-02-26 srawlins@google.com framework: Use a super-parameter in several missed cases (flutter/flutter#182580)
2026-02-25 nate.w5687@gmail.com `WidgetStatesConstraint` as a mixin (flutter/flutter#181704)
2026-02-25 Rusino@users.noreply.github.com Paint the paragraph as a single image (flutter/flutter#181206)
2026-02-25 rmolivares@renzo-olivares.dev Remove `ExtendSelectionByPageIntent` (flutter/flutter#182642)
2026-02-25 34465683+rkishan516@users.noreply.github.com feat: add few required properties to test widgets app (flutter/flutter#182805)
2026-02-25 prbillingsley89@gmail.com Updates MenuAnchor to respect software keyboard (flutter/flutter#180975)
2026-02-25 jason-simmons@users.noreply.github.com Roll ImGui to v1.92.6-docking (flutter/flutter#182799)
2026-02-25 jason-simmons@users.noreply.github.com Roll GoogleTest to e9907112b472 (flutter/flutter#182795)
2026-02-25 Veselblu@yandex.ru Make positionInlineChildren assert much clearer (flutter/flutter#182093)
...
mboetger pushed a commit to mboetger/flutter that referenced this pull request Mar 26, 2026
…r all `android_engine_test` screenshot tests (flutter#182961)

Speculative fix for flakes where we see a full black screen image in the
golden tests from time to time ([for
example](https://flutter-gold.skia.org/detail?grouping=name%3Dandroid_engine_test.vulkan.platform_view_tap_color_change_initial%26source_type%3Dflutter&digest=5ba6df7acef516f7dab78587cf30ce20)).
I don't have solid proof, but I've only ever seen those cases happen in
this set of tests, which all are missing a call to
`flutterDriver.waitUntilFirstFrameRasterized()`.

Even if the change doesn't fix the problem, it abstractly makes more
sense to me to wait for the first frame to be rasterized before we go
off trying to screenshot anything anyways, so I would not regret this
change even if it does nothing.

Co-authored-by: Gray Mackall <mackall@google.com>
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4 participants