OCMock - 訪問部分模擬對象的弱屬性導致零星崩潰

我使用OCMock來測試從故事板實例化的UIViewControllers。按照最佳實踐，所有視圖控制器視圖子視圖的IBOutlets屬性均爲weak。當我爲這些視圖控制器編寫測試時，其中測試調用依賴於弱屬性的方法，我看到零星的EXC_BAD_ACCESS崩潰，就像我附加的那樣。OCMock - 訪問部分模擬對象的弱屬性導致零星崩潰

每次單元測試運行都不會發生崩潰。似乎沒有一種模式，無論碰撞表面與否都完全是隨機的。部分模擬視圖控制器的這種設計技術也在應用程序的許多地方使用。

可能會發生什麼？我在這裏試圖做的事情有衝突嗎？

@interface CustomUIViewControllerTests : XCTestCase 

@property (nonatomic, strong) CustomUIViewController *vc; 
@property (nonatomic, strong) UIStoryboard *mainStoryboard; 

@end 

@implementation CustomUIViewControllerTests 

- (void)setUp 
{ 
    [super setUp]; 

    // In order to test data on the Storyboard - need to instantiate the Storyboard 
    self.mainStoryboard = [UIStoryboard storyboardWithName:[[NSBundle mainBundle].infoDictionary 
                  objectForKey:@"UIMainStoryboardFile"] 
                bundle:[NSBundle mainBundle]]; 

    self.vc = [_mainStoryboard instantiateViewControllerWithIdentifier:kStoryboardVCID]; 
    [self.vc loadView]; 
} 

- (void)testSomething 
{ 
    id mockController = [OCMockObject partialMockForObject:self.vc]; 
    [mockController doSomethingThatUsesAWeakProperty]; 
    //other verification/assertions here 
}

的崩潰：

Process:   XXXX [33756] 
Path:   /Users/USER/Library/Application Support/iPhone Simulator/*/XXXX.app/XXXX 
Identifier:  XXXX 
Version:   0 
Code Type:  X86-64 (Native) 
Parent Process: launchd_sim [33727] 
Responsible:  launchd_sim [33727] 
User ID:   501 

Date/Time:  2014-07-10 11:51:51.692 -0400 
OS Version:  Mac OS X 10.9.3 (13D65) 
Report Version: 11 
Anonymous UUID: 8B81673C-B92D-28D3-9940-47C83C140C8E 


Crashed Thread: 0 Dispatch queue: com.apple.main-thread 

Exception Type: EXC_BAD_ACCESS (SIGSEGV) 
Exception Codes: KERN_INVALID_ADDRESS at 0x000000011ab0e360 

External Modification Warnings: 
Debugger attached to process. 

VM Regions Near 0x11ab0e360: 
    MALLOC_TINY   0000000114700000-0000000114800000 [ 1024K] rw-/rwx SM=PRV 
--> 
    JS JIT generated code 0000056193e99000-0000056193e9a000 [ 4K] ---/rwx SM=NUL 

Application Specific Information: 
iPhone Simulator 463.9.41, iPhone OS 7.1 (iPhone Retina (4-inch 64-bit)/11D167) 


Thread 0 Crashed:: Dispatch queue: com.apple.main-thread 
0 libsystem_kernel.dylib    0x0000000103156292 __kill + 10 
1 XXXX        0x000000010010f565 CLSSignalHandler + 218 (CLSSignal.m:305) 
2 libsystem_platform.dylib   0x00000001030295aa _sigtramp + 26 
3 Foundation       0x0000000102174225 -[NSConcreteValue getValue:] + 29 
4 Foundation       0x00000001021af5be -[NSValue nonretainedObjectValue] + 25 
5 XXXX        0x0000000100153e00 +[OCPartialMockObject existingPartialMockForObject:] + 160 (OCPartialMockObject.m:50) 
6 XXXX        0x00000001001546e1 -[OCPartialMockObject forwardingTargetForSelectorForRealObject:] + 65 (OCPartialMockObject.m:170) 
7 CoreFoundation      0x0000000102a8ba5c ___forwarding___ + 156 
8 CoreFoundation      0x0000000102a8b938 _CF_forwarding_prep_0 + 120 
9 XXXX        0x0000000100028ea6 -[CustomUIViewController doSomethingThatUsesAWeakProperty] + 454 (CustomUIViewControllerTests.m:121) 
10 CoreFoundation      0x0000000102a8ff1c __invoking___ + 140 
11 CoreFoundation      0x0000000102a8fdc4 -[NSInvocation invoke] + 308 
12 CoreFoundation      0x0000000102a8ff86 -[NSInvocation invokeWithTarget:] + 54 
13 XXXX        0x0000000100154999 -[OCPartialMockObject handleUnRecordedInvocation:] + 73 (OCPartialMockObject.m:217) 
14 XXXX        0x0000000100151fe6 -[OCMockObject forwardInvocation:] + 102 (OCMockObject.m:190) 
15 CoreFoundation      0x0000000102a8bb85 ___forwarding___ + 453 
16 CoreFoundation      0x0000000102a8b938 _CF_forwarding_prep_0 + 120 
17 XXXXTests       0x000000010c0d289d -[CustomUIViewControllerTests testSomething] + 573 (CustomUIViewControllerTests.m:996) 
18 CoreFoundation      0x0000000102a8ff1c __invoking___ + 140 
19 CoreFoundation      0x0000000102a8fdc4 -[NSInvocation invoke] + 308 
20 XCTest        0x0000000109ba4c40 -[XCTestCase invokeTest] + 161 
21 XCTest        0x0000000109ba4d2c -[XCTestCase performTest:] + 91 
22 XCTest        0x0000000109ba5a75 -[XCTest run] + 65 
23 XCTest        0x0000000109ba44df -[XCTestSuite performTest:] + 125 
24 XCTest        0x0000000109ba5a75 -[XCTest run] + 65 
25 XCTest        0x0000000109ba44df -[XCTestSuite performTest:] + 125 
26 XCTest        0x0000000109ba5a75 -[XCTest run] + 65 
27 XCTest        0x0000000109ba44df -[XCTestSuite performTest:] + 125 
28 XCTest        0x0000000109ba5a75 -[XCTest run] + 65 
29 XCTest        0x0000000109ba71b4 +[XCTestProbe runTests:] + 138 
30 Foundation       0x00000001021846dc __NSFireDelayedPerform + 354 
31 CoreFoundation      0x0000000102a5cc34 __CFRUNLOOP_IS_CALLING_OUT_TO_A_TIMER_CALLBACK_FUNCTION__ + 20 
32 CoreFoundation      0x0000000102a5c7b2 __CFRunLoopDoTimer + 962 
33 CoreFoundation      0x0000000102a457be __CFRunLoopRun + 1614 
34 CoreFoundation      0x0000000102a44d83 CFRunLoopRunSpecific + 467 
35 GraphicsServices     0x00000001039dcf04 GSEventRunModal + 161 
36 UIKit        0x00000001010cce33 UIApplicationMain + 1010 
37 XXXX        0x000000010007b889 main + 169 (main.m:16) 
38 libdyld.dylib      0x000000010301f5fd start + 1

來源

2014-07-10 Andy Obusek

我認爲這可能與： http://stackoverflow.com/questions/9104544/how-can-i-get-ocmock-under-arc-to-stop-nilling-an-nsproxy- subclass-set-using-aw – tdeegan

你是什麼意思「這種部分模擬視圖控制器的設計技術也在應用程序的許多地方使用。」我用弱引用創建了一個簡單的測試，通過在我的測試中調用的方法設置了一些標籤，但沒有看到這個崩潰。 –

的問題，在這裏必須要與創建partialMock什麼時候做OCMock相關。你可以查看源代碼here。

這可能是因爲你的ViewController的看法正在nilled出來，有了它，它的所有子視圖（被設置爲網點）

但是，這是很重要的：通常你在測試嘲笑其他對象，而不是你的系統。如果你嘲笑你的SUT，這可能是你需要重構代碼的標誌。我說過，我使用部分模擬來嘲笑SUT，比如從一個懶惰實例化的屬性返回一個模擬對象，並且工作得很好。

來源

2014-08-26 11:32:55

OCMock - 訪問部分模擬對象的弱屬性導致零星崩潰

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