Xcode 10 UI Testing Parallel Builds


#1

Xcode 10 UI Tests now have the feature of allowing parallel test execution to greatly speed up tests.

However, enabling this (via Product -> Scheme -> Edit Scheme -> Test -> Options), results in bitrise getting confused and failing with no obvious error message. Digging through the raw logs, I can find messages like:

MyAppTests-Runner.app encountered an error (DTServiceHubClient failed to bless service hub for simulator Clone 2 of iPad Air (79CFCC8D-8047-4774-83FD-E439CAA58944))

The Clone 1 tests run ok, though the results are not reported.

For now, I’ll disable parallel tests, but I’m wondering what plans bitrise might have to support these? Thanks!


#2

Hi @eggheadgames,
could you please attach your failed build log url?


#3

Sure, here’s one from before we disabled parallel builds: https://app.bitrise.io/build/03210cbe70a3d3c6

Happy to test fixes, if that’s more convenient for you.


#4

Hi @eggheadgames,

thanks for the url!

We need a sample app to reproduce the issue, we will reconfigure one of our sample apps, but to speed up the process it would be great if you could provide a sample app which can reproduce the issue.


#5

Hi @eggheadgames !

Could you please try to set Output tool input in the Xcode Test for iOS step the from xcpretty to xcodebuild, and run a new build with parallel tests enabled?

It seems the xcpretty has an issue with logging multiple simulator test at the same time.
But the default xcodebuild should work.


#6

As far as I can tell, the same error is still generated. See:

https://app.bitrise.io/build/4a14cc68947c449b

2018-10-22 17:26:46.774 xcodebuild[3028:24266] Connection peer refused channel request for "dtxproxy:XCTestManager_IDEInterface:XCTestManager_DaemonConnectionInterface"; channel canceled <DTXChannel: 0x7ff7b6e1f880>
Test case 'AboutTests.testNavigationBarTitle()' passed on 'Clone 1 of iPad Air - FooTests-Runner.app (3349)' (12.878 seconds)
2018-10-22 17:26:50.071 xcodebuild[3028:21304] Connection peer refused channel request for "dtxproxy:XCTestManager_IDEInterface:XCTestManager_DaemonConnectionInterface"; channel canceled <DTXChannel: 0x7ff7b712f0d0>
2018-10-22 17:28:08.499 xcodebuild[3028:20557] [MT] IDETestOperationsObserverDebug: 268.954 elapsed -- Testing started completed.
2018-10-22 17:28:08.499 xcodebuild[3028:20557] [MT] IDETestOperationsObserverDebug: 0.000 sec, +0.000 sec -- start
2018-10-22 17:28:08.499 xcodebuild[3028:20557] [MT] IDETestOperationsObserverDebug: 268.954 sec, +268.954 sec -- end
2018-10-22 17:28:08.514 xcodebuild[3028:20557] Error Domain=com.apple.dt.AssetProviderService Code=99 "Failed to initiate service connection to simulator" UserInfo={NSUnderlyingError=0x7ff7b68aeb80 {Error Domain=DTiPhoneSimulatorErrorDomain Code=-1 "DTServiceHubClient failed to bless service hub for simulator Clone 2 of iPad Air (830FF016-0A06-4157-9A1F-0061FE944B7F)" UserInfo={NSLocalizedDescription=DTServiceHubClient failed to bless service hub for simulator Clone 2 of iPad Air (830FF016-0A06-4157-9A1F-0061FE944B7F), NSUnderlyingError=0x7ff7b68a43e0 {Error Domain=DTServiceHubClient Code=-11 "unable to contact local DTServiceHub to bless simulator connection" UserInfo={NSLocalizedDescription=unable to contact local DTServiceHub to bless simulator connection}}}}, NSLocalizedDescription=Failed to initiate service connection to simulator, NSLocalizedRecoverySuggestion=DTServiceHubClient failed to bless service hub for simulator Clone 2 of iPad Air (830FF016-0A06-4157-9A1F-0061FE944B7F)}
2018-10-22 17:28:08.514 xcodebuild[3028:20557] Error Domain=IDETestOperationsObserverErrorDomain Code=4 "DTServiceHubClient failed to bless service hub for simulator Clone 2 of iPad Air (830FF016-0A06-4157-9A1F-0061FE944B7F)" UserInfo={NSLocalizedDescription=DTServiceHubClient failed to bless service hub for simulator Clone 2 of iPad Air (830FF016-0A06-4157-9A1F-0061FE944B7F), NSLocalizedRecoverySuggestion=If you believe this error represents a bug, please attach the result bundle at /Users/vagrant/Library/Developer/Xcode/DerivedData/Foo-gewhzekhsopbesfofqckztpeajlv/Logs/Test/Run-Foo-2018.10.22_17-23-21--0700.xcresult}

#7

However, perhaps it’s not related to parallel builds at all. Other variations seem to be running fine with “Clone 1” and “Clone 2”…


#8

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