How to let the app know if it's running Unit tests in a pure Swift project?

Question

One annoying thing when running tests in Xcode 6.1 is that the entire app has to run and launch its storyboard and root view controller. In my app this runs some server calls th

Answer 1

var isRunningTests: Bool {
    return ProcessInfo.processInfo.environment["XCTestConfigurationFilePath"] != nil
}

Usage

if isRunningTests {
    return "lena.bmp"
}
return "facebook_profile_photo.bmp"