Debugging

• dubug 연산자를 사용하는경우, 모든 이벤트를 콘솔 출력한다.
• 해당 이벤트에 레이블을 추가할 수도 있다.

사용 예시)

let subscription = myInterval(0.1)
    .debug("my probe")
    .map { e in
        return "This is simply \\(e)"
    }
    .subscribe(onNext: { n in
        print(n)
    })

Thread.sleepForTimeInterval(0.5)

subscription.dispose()

콘솔 출력

[my probe] subscribed
Subscribed
[my probe] -> Event next(Box(0))
This is simply 0
[my probe] -> Event next(Box(1))
This is simply 1
[my probe] -> Event next(Box(2))
This is simply 2
[my probe] -> Event next(Box(3))
This is simply 3
[my probe] -> Event next(Box(4))
This is simply 4
[my probe] dispose
Disposed

debug 콘솔출력 커스텀 예시

extension ObservableType {
    public func myDebug(identifier: String) -> Observable<Self.E> {
        return Observable.create { observer in
            print("subscribed \\(identifier)")
            let subscription = self.subscribe { e in
                print("event \\(identifier)  \\(e)")
                switch e {
                case .next(let value):
                    observer.on(.next(value))

                case .error(let error):
                    observer.on(.error(error))

                case .completed:
                    observer.on(.completed)
                }
            }
            return Disposables.create {
                   print("disposing \\(identifier)")
                   subscription.dispose()
            }
        }
    }
 }