android - 由于 Android Camera Intent 重新绘制屏幕，​​Espresso 测试失败

Question

我有一个有摄像头的 Activity ，并且在摄像头上有一个 mask ，这是通过 onDraw() 方法完成的，我正在为摄像头屏幕上方的抽屉导航编写测试用例, 但出现错误

Perhaps the main thread has not gone idle within a reasonable amount of time? There could be an animation or something constantly repainting the screen. Or the activity is doing network calls on creation? See the threaddump logs. For your reference the last time the event queue was idle before your activity launch request was 1472804618974 and now the last time the queue went idle was: 1472804618974. If these numbers are the same your activity might be hogging the event queue

如前所述，我已经关闭了动画 https://google.github.io/android-testing-support-library/docs/espresso/setup/index.html

不知道需要做什么。

Answer 1

I have already turned off the animation as already mentioned over https://google.github.io/android-testing-support-library/docs/espresso/setup/index.html

出现这个问题不是因为动画的转动，而是因为Espresso 框架特性:Espresso 取决于您实际的应用程序上下文。

Espresso for Android is perfect and fast test automation framework, but it has one important limitation - you are allowed to operate only inside your app under test context.

That means that it is not possible to automate tests for such app features like:

• application push notifications
• contact synchronization
• navigating from another app to your app under test,

since you have to deal with other apps from the mobile device - Notification Bar, Contacts or People app, etc.

From: http://qathread.blogspot.com/2015/05/espresso-uiautomator-perfect-tandem.html

这意味着 Espresso 测试基于 UI 线程并在主线程空闲时等待()。

Perhaps the main thread has not gone idle within a reasonable amount of time? There could be an animation or something constantly repainting the screen. Or the activity is doing network calls on creation? See the threaddump logs. For your reference the last time the event queue was idle before your activity launch request was 1472804618974 and now the last time the queue went idle was: 1472804618974. If these numbers are the same your activity might be hogging the event queue.

这意味着您的主线程实际上很忙，Espresso 无法执行任何新操作，它正在等待空闲的空闲资源运行。

要解决这个问题，您有以下选择:

• 编写您自己的自定义 Espresso IdlingResource 以告知 Espresso 何时可以执行操作，换句话说:IdlingResource 告诉 Espresso 主线程何时空闲并准备就绪采取新的行动。

• 从 espresso 库中排除 appcompat 和 support-v4 :https://github.com/googlesamples/android-testing/issues/56

• 我假设您正在使用 Android Intent 运行 Camera，因此它不包含在您的实际应用上下文中，它不显示在您的应用程序 Activity/fragment 。如果是真的，尝试使用UiAutomator连同 Espresso框架。阅读:http://qathread.blogspot.com/2015/05/espresso-uiautomator-perfect-tandem.html

• 尝试使用 Robotium、Appium 或其他不受此限制的仪器框架，而不是 Espresso。

我已经在使用 Espresso、Robotium 和 UiAutomator，所以不要害怕混合使用它们。

希望对你有帮助