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[camera] integration test failed because of thread merge causing sleep to block the main thread #194397
Description
- Follow [iOS 27] camera_avfoundation integration tests fail for image/video resolution and image output format #191202 to run integration test for camera plugin
- Observe 2 of the tests (control audio/video bit rate tests) failed (sometimes got stuck when I tried it)
The test failed because this sleep:
Previously, before thread merge, this worked, because sleep only blocks the UI thread.
Now, after thread merge, the UI thread and platform thread are the same. So sleep would block all the internal setups (such as dart's event channel set up and DispatchQueue.main.async calls on the native side.
Then once sleep is done, it stops the video recording immediately.
await controller.startVideoRecording();
sleep(const Duration(milliseconds: 500));
final XFile file = await controller.stopVideoRecording();
The solution is to use await Future<void>.delayed(const Duration(milliseconds: 500)); instead
Activity
[-][camera] integration test hung because of thread merge causing sleep to block the main thread[/-][+][camera] integration test failed because of thread merge causing sleep to block the main thread[/+][camera]do not sleep to avoid hang due to merged thread (flutter#13289)
github-actions commentedon Oct 30, 2026
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