How to determine whether code is running during a unit test run

Question

I need to have some kind of if statement to ignore certain bits of code eg pop dialog if the coding is being run as part of a unit test.

Does anyone have any idea have to do this - similar to debug?

Answer 1

I prefer runtime solution, not a one based on preprocessor:

int main(int argc, char* argv[]) {
    @autoreleasepool {
        BOOL tests = NO;

        for (int i = 0; i < argc; i++) {
            NSString* argument = [NSString stringWithCString:argv[i] encoding:NSASCIIStringEncoding];

            if ([argument isEqualToString:@"-SenTest"]) {
                tests = YES;
                break;
            }
        }

       if (tests) {
           //save YES to a global variable and use it whenewer you want
       }

       UIApplicationMain(...)

    }
}

I am actually using this to have a different UIApplicationDelegate when unit tests are run, so no UI code (DB opening, notifications started etc) collides with my test cases.