Unable to find enum descriptor PBFieldDescriptorProto_Label while unit testing - ios

Question

After adding the GoogleCast framework to the unit test target I'm getting the following exception right before the tests start to run. Apart from that the SDK is fully functional. I'd appreciate any ideas!
2014-02-25 18:03:08.475 otest[3786:303] Unknown Device Type. Using UIUserInterfaceIdiomPhone based on screen size
2014-02-25 18:03:08.593 otest[3786:303] *** Assertion failure in -[GCKPB_PBFieldDescriptor initWithFieldDescription:rootClass:], /Volumes/BuildData/pulse-data/agents/wpye22.hot/recipes/415961027/base/googlemac/iPhone/Chromecast/SDKv2/Protos/../../../../ThirdParty/ProtocolBuffers/objectivec/Classes/PBDescriptor.m:409
2014-02-25 18:03:08.596 otest[3786:303] *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Unable to find enum descriptor PBFieldDescriptorProto_Label'
*** First throw call stack:
(
0 CoreFoundation 0x00b1d5e4 __exceptionPreprocess + 180
1 libobjc.A.dylib 0x007958b6 objc_exception_throw + 44
2 CoreFoundation 0x00b1d448 +[NSException raise:format:arguments:] + 136
3 Foundation 0x00010fee -[NSAssertionHandler handleFailureInMethod:object:file:lineNumber:description:] + 116
4 UnitTests 0x077205dd -[GCKPB_PBFieldDescriptor initWithFieldDescription:rootClass:] + 1640
5 UnitTests 0x0771f52c +[GCKPB_PBDescriptor allocDescriptorForClass:rootClass:fields:fieldCount:enums:enumCount:ranges:rangeCount:storageSize:wireFormat:] + 173
6 UnitTests 0x076e550f +[GCKPB_PBFieldDescriptorProto descriptor] + 179
7 UnitTests 0x077226b2 +[GCKPB_PBGeneratedMessage initialize] + 100
8 libobjc.A.dylib 0x00796275 _class_initialize + 599
9 libobjc.A.dylib 0x0079d0f1 lookUpImpOrForward + 158
10 libobjc.A.dylib 0x0079d04e _class_lookupMethodAndLoadCache3 + 55
11 libobjc.A.dylib 0x007a512f objc_msgSend + 139
12 SenTestingKit 0x201086c6 +[NSObject(SenTestRuntimeUtilities) senIsASuperclassOfClass:] + 74
13 SenTestingKit 0x2010879e +[NSObject(SenTestRuntimeUtilities) senAllSubclasses] + 154
14 SenTestingKit 0x20106fa0 +[SenTestSuite updateCache] + 42
15 SenTestingKit 0x201071cf +[SenTestSuite suiteForBundleCache] + 93
16 SenTestingKit 0x20107241 +[SenTestSuite testSuiteForBundlePath:] + 101
17 SenTestingKit 0x201061fb +[SenTestProbe specifiedTestSuite] + 294
18 SenTestingKit 0x20106467 +[SenTestProbe runTests:] + 177
19 libobjc.A.dylib 0x007a7737 +[NSObject performSelector:withObject:] + 70
20 otest 0x00002372 otest + 4978
21 otest 0x000025c4 otest + 5572
22 otest 0x000026a5 otest + 5797
23 otest 0x00002031 otest + 4145
24 libdyld.dylib 0x0165570d start + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException

Answer 1

OCUnit's behaviour is to go through each class and hence call +initialize:
But this is not handled properly by GCKPB_PBGeneratedMessage and this bug has already been reported here.
While waiting for a fix, a temporary solution might be to mock GCKPB_PBGeneratedMessage's +initialize method in your unit tests with OCMock (or any other mocking framework) by adding the following code to your test class:
#import <OCMock/OCMock.h>
#interface GCKPB_PBGeneratedMessage : NSObject
#end
and
+ (void)initialize
{
id mockCastGeneratedMessage = [OCMockObject mockForClass:[GCKPB_PBGeneratedMessage class]];
[[mockCastGeneratedMessage stub] initialize];
}
Edit
As of iOS sender API v2.3.0 953, this is now fixed and this workaround is no longer required.

Answer 2

I came across a similar error when doing Unit Tests using Specta. I manually ignored the assert by creating my own assertion handler.
Defined in a helper class:
#define SPT_fail(...) \
SPTSpec *spec = [[SPTCurrentTestCase class] spt_spec]; \
NSString *message = [NSString stringWithFormat:__VA_ARGS__]; \
[SPTCurrentTestCase recordFailureWithDescription:message inFile:spec.fileName atLine:(int)spec.lineNumber expected:YES]; \
xxxLoggingAssertionHandler.m:
#implementation xxxLoggingAssertionHandler
+ (void)load {
[xxxLoggingAssertionHandler addHandler];
}
- (void)handleFailureInMethod:(SEL)selector
object:(id)object
file:(NSString *)fileName
lineNumber:(NSInteger)line
description:(NSString *)format, ... {
// ignore chromecast asserts only
NSString *selectorName = NSStringFromSelector(selector);
BOOL ignore = [selectorName isEqualToString:#"initWithFieldDescription:rootClass:"] || [selectorName isEqualToString:#"allocDescriptorForClass:rootClass:fields:fieldCount:enums:enumCount:ranges:rangeCount:storageSize:wireFormat:"];
if (!ignore) {
SPT_fail(#"NSAssert Failure: Method %# for object %# in %##%i", selectorName, object, fileName, line);
}
}
- (void)handleFailureInFunction:(NSString *)functionName
file:(NSString *)fileName
lineNumber:(NSInteger)line
description:(NSString *)format, ... {
SPT_fail(#"NSCAssert Failure: Function (%#) in %##%i", functionName, fileName, line);
}
+ (void)addHandler {
NSAssertionHandler *assertionHandler = [[xxxLoggingAssertionHandler alloc] init];
[[[NSThread currentThread] threadDictionary] setValue:assertionHandler
forKey:NSAssertionHandlerKey];
}
+ (void)removeHandler {
[[[NSThread currentThread] threadDictionary] setValue:nil
forKey:NSAssertionHandlerKey];
}
#end