[google_maps_flutter] XCUITests stuck when handling permission popups #93325
Description
Sometime in the last few days, while the flutter/plugins tree was red due to an out-of-band Android failures, we picked up an out-of-band iOS failure, also on master, in google_maps_flutter/google_maps_flutter's XCUITests:
2021-11-09 07:23:58.445405-0800 RunnerUITests-Runner[7419:57891] Attributes: Application, pid: 7423, label: 'google_maps_flutter_example'
Element subtree:
→Application, 0x600000310460, pid: 7423, label: 'google_maps_flutter_example'
Window (Main), 0x600000310700, {{0.0, 0.0}, {414.0, 896.0}}
Other, 0x600000310620, {{0.0, 0.0}, {414.0, 896.0}}
Other, 0x6000003107e0, {{0.0, 0.0}, {414.0, 896.0}}
Path to element:
→Application, 0x600000310460, pid: 7423, label: 'google_maps_flutter_example'
Query chain:
→Find: Target Application 'dev.flutter.plugins.googleMobileMapsExample'
Output: {
Application, pid: 7423, label: 'google_maps_flutter_example'
}
/var/folders/tn/f_9sf1xx5t14qm_6f83q3b840000gn/T/cirrus-ci-build/packages/google_maps_flutter/google_maps_flutter/example/ios/RunnerUITests/GoogleMapsUITests.m:56: error: -[GoogleMapsUITests testUserInterface] : failed - Failed due to not able to find platform view
t = 36.36s Tear Down
Test Case '-[GoogleMapsUITests testUserInterface]' failed (36.570 seconds).
Example failure: https://api.cirrus-ci.com/v1/task/4519418760790016/logs/native_test.log
I can reproduce locally, and it appears that what's happening is that running with master, the handler added with addUIInterruptionMonitorWithDescription is never firing, so it get stuck at the permission prompt. Running exactly the same test with the same version of Xcode, etc. but on stable, the test works and the breakpoints that I set in that handler fire.
Looking at engine commits, flutter/engine#29531 seems suspicious based on timing and topic, but I don't have any specific evidence that it's the cause yet. (I don't have a remotely recent engine build, so it would take forever for me to verify locally.)