WaitForState.swift

static func waitForStateUpdate(context: SideEffectContext<AppState, DependenciesContainer>,
                                 attempt: Int = 50,
                                 shouldPass: @escaping (_ context: SideEffectContext<AppState, DependenciesContainer>) -> Bool) -> Promise<Void> {
    
    func recursiveWait(context: SideEffectContext<AppState, DependenciesContainer>,
                       attempt: Int,
                       shouldPass: @escaping (_ context: SideEffectContext<AppState, DependenciesContainer>) -> Bool,
                       resolve: @escaping (())->(),
                       reject: @escaping (Error)->()) {
      
      guard shouldPass(context) else {
        if attempt == 0 {
          reject(WaitStateError.timeout)
        } else {
          DispatchQueue.global().asyncAfter(deadline: .now() + .milliseconds(100)) {
            recursiveWait(context: context, attempt: attempt - 1, shouldPass: shouldPass, resolve: resolve, reject: reject)
          }
        }
        return
      }
      resolve(())
    }
    
    return Promise<Void> { (resolve, reject, _) in
      recursiveWait(context: context, attempt: attempt, shouldPass: shouldPass, resolve: resolve, reject: reject)
    }
  }