Swift 将单元测试推送到ViewController

我正在尝试运行一个测试用例，以验证某个触发器是否指向正确的pushViewController。在执行以下代码时，应用程序一切正常：

        let testController = 
            ContributionsViewController(
                nibName: "ContributionsViewController",
                bundle: nil)
        println("currentTopVC: \(navigationController?.topViewController)")
        navigationController?.pushViewController(testController, animated: true)
        println("VC after Pushing: \(navigationController?.topViewController)")
        println("No of VC: \(navigationController?.viewControllers.count)")

我可以通过查看输出来证明：

currentTopVC: Optional(<AppMenu.MenuViewController: 0x7fdabae62860>) 
VC after Pushing: Optional(<AppMenu.ContributionsViewController: 0x7fdabada39a0>) 
No of VC: Optional(2)

currentTopVC:可选（）
推送后的VC:可选（）
VC编号：可选（2）

AppDelegate中设置的原始“MenuViewController”被ContributionViewController替换

但是，从XCEST执行相同的代码失败

---

pushViewController被忽略

a我想马上给出解决方案：

不能使用动画：true来推送viewcontroller

必须设置动画：false

let testController = 
            ContributionsViewController(
                nibName: "ContributionsViewController",
                bundle: nil)
        println("currentTopVC: \(navigationController?.topViewController)")
        navigationController?.pushViewController(testController, animated: false)
        println("VC after Pushing: \(navigationController?.topViewController)")
        println("No of VC: \(navigationController?.viewControllers.count)")