Xcodeでユニットテストを実行しようとするとFabricエラー（ FABException ）が発生する現象について、（暫定的ですが）対応方法が分かったのでメモしておきます。
前提
Xcodeバージョン
Version 11.4 (11E146)
CocoaPodsライブラリバージョン
Crashlytics (3.14.0)
Fabric (1.10.2)
Firebase/Core (6.21.0)
エラーの内容
Xcodeでユニットテストを実行しようとしたところ、以下のようなエラーが発生しました。
2020-04-14 21:25:16.896671+0900 my-app.debug[11653:9277327] [GoogleDataTransport][I-GDTCOR001006] There was an error reading extension bytes from disk: Error Domain=NSCocoaErrorDomain Code=260 "The file “ event-15836755976515215681” couldn’ t be opened because there is no such file." UserInfo={NSFilePath=/Users/username/Library/Developer/CoreSimulator/Devices/388F2986-4BFC-4913-ABAC-60C79B78307E/data/Containers/Data/Application/67018EDE-63CF-41B1-AF95-78A9BD40EE86/Library/Caches/google-sdks-events/event-15836755976515215681, NSUnderlyingError=0x600002a1d3b0 {Error Domain=NSPOSIXErrorDomain Code=2 "No such file or directory"}}
2020-04-14 21:25:16.897135+0900 my-app.debug[11653:9277327] [GoogleDataTransport][I-GDTCOR001006] There was an error reading extension bytes from disk: Error Domain=NSCocoaErrorDomain Code=260 "The file “ event-15836102738338756022” couldn’ t be opened because there is no such file." UserInfo={NSFilePath=/Users/username/Library/Developer/CoreSimulator/Devices/388F2986-4BFC-4913-ABAC-60C79B78307E/data/Containers/Data/Application/67018EDE-63CF-41B1-AF95-78A9BD40EE86/Library/Caches/google-sdks-events/event-15836102738338756022, NSUnderlyingError=0x600002a57330 {Error Domain=NSPOSIXErrorDomain Code=2 "No such file or directory"}}
2020-04-14 21:25:16.978966+0900 my-app.debug[11653:9277054] [Crashlytics] Version 3.14.0 (144)
2020-04-14 21:25:17.047625+0900 my-app.debug[11653:9277054] *** Terminating app due to uncaught exception 'FABException', reason: '[Fabric] Value of Info.plist key "Fabric" must be a NSDictionary.'
*** First throw call stack:
(
0 CoreFoundation 0x00007fff23e3dcce __exceptionPreprocess + 350
1 libobjc.A.dylib 0x00007fff50b3b9b2 objc_exception_throw + 48
2 CoreFoundation 0x00007fff23e3db0c +[NSException raise:format:] + 188
3 my-app.debug 0x00000001102b4240 -[Fabric validFabricConfigFromInfoPlist:] + 334
4 my-app.debug 0x00000001102b3e21 -[Fabric fabricConfig] + 127
5 my-app.debug 0x00000001102b3f6e -[Fabric APIKey] + 285
6 my-app.debug 0x000000011027bf43 -[Crashlytics APIKey] + 55
7 my-app.debug 0x00000001102873ee -[CLSCrashReportingController APIKey] + 57
8 my-app.debug 0x0000000110286ace -[CLSCrashReportingController startWithProfilingMark:betaToken:] + 258
9 my-app.debug 0x000000011027b959 __20-[Crashlytics start]_block_invoke + 617
10 libdispatch.dylib 0x00007fff519798cb _dispatch_client_callout + 8
11 libdispatch.dylib 0x00007fff5197ab02 _dispatch_once_callout + 20
12 my-app.debug 0x000000011027b6ee -[Crashlytics start] + 131
13 my-app.debug 0x000000011027bb04 +[Crashlytics initializeIfNeeded] + 48
14 my-appTests 0x00000001151bbc41 __15+[Fabric with:]_block_invoke + 535
15 libdispatch.dylib 0x00007fff519798cb _dispatch_client_callout + 8
16 libdispatch.dylib 0x00007fff5197ab02 _dispatch_once_callout + 20
17 my-appTests 0x00000001151bba24 +[Fabric with:] + 233
18 my-appTests 0x00000001151bd992 +[Fabric autoInitialize:] + 680
19 my-appTests 0x00000001151bd6aa __14+[Fabric load]_block_invoke + 191
20 Foundation 0x00007fff2590d694 -[__NSObserver _doit:] + 287
21 CoreFoundation 0x00007fff23d68d0c __CFNOTIFICATIONCENTER_IS_CALLING_OUT_TO_AN_OBSERVER__ + 12
22 CoreFoundation 0x00007fff23d68185 _CFXRegistrationPost1 + 421
23 CoreFoundation 0x00007fff23d67ef1 ___CFXNotificationPost_block_invoke + 193
24 CoreFoundation 0x00007fff23e652d3 -[_CFXNotificationRegistrar find:object:observer:enumerator:] + 1795
25 CoreFoundation 0x00007fff23d67846 _CFXNotificationPost + 950
26 Foundation 0x00007fff2590de2b -[NSNotificationCenter postNotificationName:object:userInfo:] + 59
27 my-app.debug 0x00000001102ce2a6 +[FIRApp sendNotificationsToSDKs:] + 502
28 my-app.debug 0x00000001102cca12 +[FIRApp configureWithName:options:] + 1410
29 my-app.debug 0x00000001102cc34f +[FIRApp configureWithOptions:] + 143
30 my-app.debug 0x00000001102cc29d +[FIRApp configure] + 157
31 my-app.debug 0x000000010fd26206 $s24national_flags_ios_debug8LauncherC6launchyyF + 166
32 my-app.debug 0x000000010fcf5394 $s24national_flags_ios_debug11AppDelegateC11application_29didFinishLaunchingWithOptionsSbSo13UIApplicationC_SDySo0m6LaunchL3KeyaypGSgtF + 100
33 my-app.debug 0x000000010fcf5613 $s24national_flags_ios_debug11AppDelegateC11application_29didFinishLaunchingWithOptionsSbSo13UIApplicationC_SDySo0m6LaunchL3KeyaypGSgtFTo + 211
34 UIKitCore 0x00007fff48c0fecc -[UIApplication _handleDelegateCallbacksWithOptions:isSuspended:restoreState:] + 232
35 UIKitCore 0x00007fff48c1186b -[UIApplication _callInitializationDelegatesWithActions:forCanvas:payload:fromOriginatingProcess:] + 3985
36 UIKitCore 0x00007fff48c1742d -[UIApplication _runWithMainScene:transitionContext:completion:] + 1226
37 UIKitCore 0x00007fff48322a61 -[_UISceneLifecycleMultiplexer completeApplicationLaunchWithFBSScene:transitionContext:] + 122
38 UIKitCore 0x00007fff4882d065 _UIScenePerformActionsWithLifecycleActionMask + 83
39 UIKitCore 0x00007fff48323573 __101-[_UISceneLifecycleMultiplexer _evalTransitionToSettings:fromSettings:forceExit:withTransitionStore:]_block_invoke + 198
40 UIKitCore 0x00007fff48322f82 -[_UISceneLifecycleMultiplexer _performBlock:withApplicationOfDeactivationReasons:fromReasons:] + 296
41 UIKitCore 0x00007fff483233a0 -[_UISceneLifecycleMultiplexer _evalTransitionToSettings:fromSettings:forceExit:withTransitionStore:] + 818
42 UIKitCore 0x00007fff48322c35 -[_UISceneLifecycleMultiplexer uiScene:transitionedFromState:withTransitionContext:] + 345
43 UIKitCore 0x00007fff48327226 __186-[_UIWindowSceneFBSSceneTransitionContextDrivenLifecycleSettingsDiffAction _performActionsForUIScene:withUpdatedFBSScene:settingsDiff:fromSettings:transitionContext:lifecycleActionType:]_block_invoke_2 + 178
44 UIKitCore 0x00007fff48743415 +[BSAnimationSettings(UIKit) tryAnimatingWithSettings:actions:completion:] + 852
45 UIKitCore 0x00007fff4884b7c2 _UISceneSettingsDiffActionPerformChangesWithTransitionContext + 240
46 UIKitCore 0x00007fff48326f41 __186-[_UIWindowSceneFBSSceneTransitionContextDrivenLifecycleSettingsDiffAction _performActionsForUIScene:withUpdatedFBSScene:settingsDiff:fromSettings:transitionContext:lifecycleActionType:]_block_invoke + 153
47 UIKitCore 0x00007fff4884b6c5 _UISceneSettingsDiffActionPerformActionsWithDelayForTransitionContext + 84
48 UIKitCore 0x00007fff48326daf -[_UIWindowSceneFBSSceneTransitionContextDrivenLifecycleSettingsDiffAction _performActionsForUIScene:withUpdatedFBSScene:settingsDiff:fromSettings:transitionContext:lifecycleActionType:] + 381
49 UIKitCore 0x00007fff4817a968 __64-[UIScene scene:didUpdateWithDiff:transitionContext:completion:]_block_invoke + 657
50 UIKitCore 0x00007fff48179527 -[UIScene _emitSceneSettingsUpdateResponseForCompletion:afterSceneUpdateWork:] + 253
51 UIKitCore 0x00007fff4817a692 -[UIScene scene:didUpdateWithDiff:transitionContext:completion:] + 210
52 UIKitCore 0x00007fff48c15975 -[UIApplication workspace:didCreateScene:withTransitionContext:completion:] + 512
53 UIKitCore 0x00007fff4876a160 -[UIApplicationSceneClientAgent scene:didInitializeWithEvent:completion:] + 361
54 FrontBoardServices 0x00007fff36c6091e -[FBSSceneImpl _callOutQueue_agent_didCreateWithTransitionContext:completion:] + 419
55 FrontBoardServices 0x00007fff36c869b1 __86-[FBSWorkspaceScenesClient sceneID:createWithParameters:transitionContext:completion:]_block_invoke.154 + 102
56 FrontBoardServices 0x00007fff36c6b347 -[FBSWorkspace _calloutQueue_executeCalloutFromSource:withBlock:] + 220
57 FrontBoardServices 0x00007fff36c86642 __86-[FBSWorkspaceScenesClient sceneID:createWithParameters:transitionContext:completion:]_block_invoke + 355
58 libdispatch.dylib 0x00007fff519798cb _dispatch_client_callout + 8
59 libdispatch.dylib 0x00007fff5197c292 _dispatch_block_invoke_direct + 285
60 FrontBoardServices 0x00007fff36cac2d9 __FBSSERIALQUEUE_IS_CALLING_OUT_TO_A_BLOCK__ + 30
61 FrontBoardServices 0x00007fff36cabfc7 -[FBSSerialQueue _queue_performNextIfPossible] + 441
62 FrontBoardServices 0x00007fff36cac4d6 -[FBSSerialQueue _performNextFromRunLoopSource] + 22
63 CoreFoundation 0x00007fff23da1c71 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17
64 CoreFoundation 0x00007fff23da1b9c __CFRunLoopDoSource0 + 76
65 CoreFoundation 0x00007fff23da1374 __CFRunLoopDoSources0 + 180
66 CoreFoundation 0x00007fff23d9bf6e __CFRunLoopRun + 974
67 CoreFoundation 0x00007fff23d9b884 CFRunLoopRunSpecific + 404
68 GraphicsServices 0x00007fff38b5ac1a GSEventRunModal + 139
69 UIKitCore 0x00007fff48c19220 UIApplicationMain + 1605
70 my-app.debug 0x000000010fcf610b main + 75
71 libdyld.dylib 0x00007fff519b910d start + 1
72 ??? 0x0000000000000007 0x0 + 7
)
libc++abi.dylib: terminating with uncaught exception of type NSException
+[FIRApp sendNotificationsToSDKs:] でクラッシュしているようです。
暫定的な対応
この件について、FirebaseのiOS向けQuickstartにIssueが立っていました。
Podfile のテスト用ターゲットに inherit!: search_paths を記述することで解決したケースもあるようですが、自分の場合はテスト実行中にFirebaseの構成処理を呼び出さないようにすることで暫定対応しました。
func isRunningUnitTests() -> Bool {
return ProcessInfo.processInfo.environment["XCInjectBundleInto"] != nil
}
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
...
if !isRunningUnitTests() {
FirebaseApp.configure()
}
...
return true
}
以上