Generate gcda-files with Xcode5, iOS7 simulator and XCTest

Question

Being inspired by the solution to this question I tried using the same approach with XCTest.

I\'ve set \'Generate Test Coverage Files=YES\' and \'Instrument Program

Answer 1

Here's another solution that avoids having to edit your AppDelegate

UIApplication+Instrumented.m (put this in your main target):

@implementation UIApplication (Instrumented)

#ifdef DEBUG

+ (void)load
{
    NSString* key = @"XCTestObserverClass";
    NSString* observers = [[NSUserDefaults standardUserDefaults] stringForKey:key];
    observers = [NSString stringWithFormat:@"%@,%@", observers, @"XCTCoverageFlusher"];
    [[NSUserDefaults standardUserDefaults] setValue:observers forKey:key];
}

- (void)xtc_gcov_flush
{
    extern void __gcov_flush(void);
    __gcov_flush();
}

#endif

@end

XCTCoverageFlusher.m (put this in your test target):

@interface XCTCoverageFlusher : XCTestObserver
@end

@implementation XCTCoverageFlusher

- (void) stopObserving
{
    [super stopObserving];
    UIApplication* application = [UIApplication sharedApplication];
    SEL coverageFlusher = @selector(xtc_gcov_flush);
    if ([application respondsToSelector:coverageFlusher])
    {
        objc_msgSend(application, coverageFlusher);
    }
    [application.delegate applicationWillTerminate:application];
}

@end