[iOS] Soften TaskRunner.postTask(delay:task:) delay check#185729
Merged
Conversation
github-actions
Bot
added
platform-ios
![gemini-code-assist[bot]](https://avatars.githubusercontent.com/in/956858?s=60&v=4){kind=small}
Contributor
There was a problem hiding this comment.
Code Review
This pull request modifies the testPostDelayedTask in TaskRunnerTests.swift to include an epsilon tolerance in the timing assertion. A review comment suggests reducing the epsilon value from 0.05 to 0.001 to ensure the test remains valid and does not allow tasks to execute significantly earlier than the intended delay.
Previously, we were performing a hard check that the task was executed at least 100ms after it was posted. All clocks in our tests make use of mach_absolute_time() under the hood, including std::chrono::steady_clock from libcxx, but error could be introduced from at least two sources: * Floating point rounding, particularly with 0.1; we could fix this by using 0.25 instead. Pretty low chance of triggering a failure, but certainly possible. * Clock drift, e.g. due to a really badly timed NTP update. Exceedingly unlikely but possible, and probably maddening if it did occur. Issue: flutter#157140
cbracken
force-pushed
the
soften-delay-check
branch
from
94a67d3 to
bf92698
Compare
10 tasks
hellohuanlin
approved these changes
Apr 29, 2026
This was referenced Apr 30, 2026
auto-submit Bot
pushed a commit
to flutter/packages
that referenced
this pull request
May 1, 2026
Roll Flutter from 81bc3d69535f to 707dbc0420a3 (85 revisions) flutter/flutter@81bc3d6...707dbc0 2026-05-01 [email protected] Removing TODOs from the WebParagraph code and addressing technical debts. (flutter/flutter#185168) 2026-05-01 [email protected] Ensure that vulkan_interface.h gets included before vk_mem_alloc.h (flutter/flutter#185777) 2026-05-01 [email protected] [flutter_tools] Bump dwds dependency to v27.1.1 (flutter/flutter#185357) 2026-05-01 [email protected] Roll Dart SDK from 6d4a319cbdac to 9aa7097f2e3e (3 revisions) (flutter/flutter#185888) 2026-05-01 [email protected] Roll Skia from fa1dcb289709 to 7ac6d42f2fd0 (1 revision) (flutter/flutter#185887) 2026-05-01 [email protected] Roll Skia from 54cc00adde38 to fa1dcb289709 (3 revisions) (flutter/flutter#185880) 2026-05-01 [email protected] [iOS] Migrate to FlutterFMLTaskRunner(s) (flutter/flutter#185815) 2026-05-01 [email protected] Remove material imports from navigator_on_did_remove_page_test and scrollable_in_overlay_test (flutter/flutter#182546) 2026-05-01 [email protected] Roll Skia from 2e279266f06a to 54cc00adde38 (3 revisions) (flutter/flutter#185872) 2026-05-01 [email protected] dev: Remove unused parameters (flutter/flutter#185345) 2026-05-01 [email protected] Roll Fuchsia Linux SDK from HN5VYzftnf_B8T-n9... to VnzuUefDQR0UhQ1L1... (flutter/flutter#185870) 2026-05-01 [email protected] Use g_free when using glib memory allocation (flutter/flutter#185519) 2026-05-01 [email protected] Roll Dart SDK from d30df3428f2e to 6d4a319cbdac (2 revisions) (flutter/flutter#185862) 2026-05-01 [email protected] Remove trivial test utility cross-imports from material and cupertino… (flutter/flutter#184295) 2026-05-01 [email protected] Inline test callback painter in tab scaffold test (flutter/flutter#184851) 2026-05-01 [email protected] [a11y] Add support for high contrast themes in the a11y assessments app (flutter/flutter#185801) 2026-05-01 [email protected] [a11y assessment app] Use default color for banner (flutter/flutter#185804) 2026-04-30 [email protected] Added name to AUTHORS (flutter/flutter#185586) 2026-04-30 [email protected] Remove semantics_tester import from raw_material_button_test.dart (flutter/flutter#184806) 2026-04-30 [email protected] Remove semantics_tester import from user_accounts_drawer_header_test.dart (flutter/flutter#184809) 2026-04-30 [email protected] Roll Skia from 7b88c5c281e5 to 2e279266f06a (5 revisions) (flutter/flutter#185854) 2026-04-30 [email protected] Handle symmetric rectangular and elliptical round super ellipses in the uber SDF renderer (flutter/flutter#185695) 2026-04-30 [email protected] Match on process name before killing for SwiftPM (flutter/flutter#185774) 2026-04-30 [email protected] Sync CHANGELOG.md from stable (flutter/flutter#185838) 2026-04-30 [email protected] Roll Dart SDK from 25910e31a6d2 to d30df3428f2e (5 revisions) (flutter/flutter#185839) 2026-04-30 [email protected] Check cross imports test subfolders (flutter/flutter#185493) 2026-04-30 [email protected] test: inline TestCallbackPainter in cupertino/picker_test.dart (flutter/flutter#185398) 2026-04-30 [email protected] Update customer testing version (flutter/flutter#185830) 2026-04-30 [email protected] Adapt the Metal shader library output list for debug versus release mode (flutter/flutter#185798) 2026-04-30 [email protected] [Impeller] Port a recent Vulkan swapchain fence waiting fix to the AHB version of the swapchain (flutter/flutter#185763) 2026-04-30 [email protected] Roll Skia from 26a59aa71eff to 7b88c5c281e5 (1 revision) (flutter/flutter#185821) 2026-04-30 [email protected] Roll Skia from 6b4167b4e204 to 26a59aa71eff (4 revisions) (flutter/flutter#185808) 2026-04-30 [email protected] [a11y] Mark SemanticsNode dirty when customSemanticsActions change (flutter/flutter#185707) 2026-04-30 [email protected] Roll Skia from 1bd2f1cc2746 to 6b4167b4e204 (8 revisions) (flutter/flutter#185799) 2026-04-30 [email protected] [iOS] Extract FlutterVSyncClient from vsync_waiter_ios (flutter/flutter#185737) 2026-04-30 [email protected] Roll Fuchsia Linux SDK from nnv8-SSam6yE8dw4z... to HN5VYzftnf_B8T-n9... (flutter/flutter#185782) 2026-04-29 [email protected] [iOS] Soften TaskRunner.postTask(delay:task:) delay check (flutter/flutter#185729) 2026-04-29 [email protected] Add reportErrors to ImageStreamListener (flutter/flutter#180327) 2026-04-29 [email protected] Roll Skia from f5c781c083c7 to 1bd2f1cc2746 (5 revisions) (flutter/flutter#185761) 2026-04-29 [email protected] Update merge semantics logic to merge sibling nodes (flutter/flutter#183745) 2026-04-29 [email protected] Roll Packages from ba80f8f to cde5b36 (12 revisions) (flutter/flutter#185748) 2026-04-29 [email protected] examples: Remove unused parameters (flutter/flutter#185346) 2026-04-29 [email protected] Update TickerMode.getValuesNotifier to handle initialization during State.dispose (flutter/flutter#185248) 2026-04-29 [email protected] Update triage links (flutter/flutter#185714) 2026-04-29 [email protected] Add support for high contrast and color inversion on Android (flutter/flutter#182263) 2026-04-29 [email protected] Roll Skia from 05251260fda6 to f5c781c083c7 (2 revisions) (flutter/flutter#185743) ...
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
2 participants
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
Previously, we were performing a hard check that the task was executed at least 100ms after it was posted. All clocks in our tests make use of mach_absolute_time() under the hood, including std::chrono::steady_clock from libcxx, but error could be introduced from at least two sources:
Issue: #157140
Pre-launch Checklist
///).If you need help, consider asking for advice on the #hackers-new channel on Discord.
If this change needs to override an active code freeze, provide a comment explaining why. The code freeze workflow can be overridden by code reviewers. See pinned issues for any active code freezes with guidance.
Note: The Flutter team is currently trialing the use of Gemini Code Assist for GitHub. Comments from the
gemini-code-assistbot should not be taken as authoritative feedback from the Flutter team. If you find its comments useful you can update your code accordingly, but if you are unsure or disagree with the feedback, please feel free to wait for a Flutter team member's review for guidance on which automated comments should be addressed.