Espresso测试失败,经常出现NoActivityResumedException

Question

编辑:更新了描述和错误消息并添加了一些图像.还是有这个问题.

运行espresso测试时,我发生了很多次奇怪的错误.经过几次成功的测试运行后,测试开始失败并出现以下异常:

   06-23 13:04:48.438   info    TestRunner  failed: WhenNavigatingToReportsThenCorrectViewShouldBeShown(com.myapp.ui.views.MainActivityTest)
06-23 13:04:48.439  info    TestRunner  ----- begin exception -----
06-23 13:04:48.441  info    TestRunner  android.support.test.espresso.NoActivityResumedException: No activities in stage RESUMED. Did you forget to launch the activity. (test.getActivity() or similar)?
06-23 13:04:48.441  info    TestRunner  at dalvik.system.VMStack.getThreadStackTrace(Native Method)
06-23 13:04:48.441  info    TestRunner  at java.lang.Thread.getStackTrace(Thread.java:580)
06-23 13:04:48.441  info    TestRunner  at android.support.test.espresso.base.DefaultFailureHandler.getUserFriendlyError(DefaultFailureHandler.java:82)
06-23 13:04:48.441  info    TestRunner  at android.support.test.espresso.base.DefaultFailureHandler.handle(DefaultFailureHandler.java:53)
06-23 13:04:48.441  info    TestRunner  at android.support.test.espresso.ViewInteraction.runSynchronouslyOnUiThread(ViewInteraction.java:184)
06-23 13:04:48.441  info    TestRunner  at android.support.test.espresso.ViewInteraction.doPerform(ViewInteraction.java:115)
06-23 13:04:48.441  info    TestRunner  at android.support.test.espresso.ViewInteraction.perform(ViewInteraction.java:87)
06-23 13:04:48.441  info    TestRunner  at com.myapp.ui.views.MainActivityTest.WhenNavigatingToReportsThenCorrectViewShouldBeShown(MainActivityTest.java:96)
06-23 13:04:48.441  info    TestRunner  at java.lang.reflect.Method.invoke(Native Method)
06-23 13:04:48.441  info    TestRunner  at java.lang.reflect.Method.invoke(Method.java:372)
06-23 13:04:48.441  info    TestRunner  at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:45)
06-23 13:04:48.441  info    TestRunner  at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
06-23 13:04:48.441  info    TestRunner  at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:42)
06-23 13:04:48.441  info    TestRunner  at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
06-23 13:04:48.441  info    TestRunner  at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:28)
06-23 13:04:48.441  info    TestRunner  at android.support.test.internal.statement.UiThreadStatement.evaluate(UiThreadStatement.java:55)
06-23 13:04:48.441  info    TestRunner  at android.support.test.rule.ActivityTestRule$ActivityStatement.evaluate(ActivityTestRule.java:257)
06-23 13:04:48.441  info    TestRunner  at org.junit.rules.RunRules.evaluate(RunRules.java:18)
06-23 13:04:48.441  info    TestRunner  at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:263)
06-23 13:04:48.441  info    TestRunner  at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:68)
06-23 13:04:48.441  info    TestRunner  at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:47)
06-23 13:04:48.441  info    TestRunner  at org.junit.runners.ParentRunner$3.run(ParentRunner.java:231)
06-23 13:04:48.441  info    TestRunner  at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:60)
06-23 13:04:48.441  info    TestRunner  at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:229)
06-23 13:04:48.441  info    TestRunner  at org.junit.runners.ParentRunner.access$000(ParentRunner.java:50)
06-23 13:04:48.441  info    TestRunner  at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:222)
06-23 13:04:48.441  info    TestRunner  at org.junit.runners.ParentRunner.run(ParentRunner.java:300)
06-23 13:04:48.441  info    TestRunner  at org.junit.runners.Suite.runChild(Suite.java:128)
06-23 13:04:48.441  info    TestRunner  at org.junit.runners.Suite.runChild(Suite.java:24)
06-23 13:04:48.441  info    TestRunner  at org.junit.runners.ParentRunner$3.run(ParentRunner.java:231)
06-23 13:04:48.441  info    TestRunner  at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:60)
06-23 13:04:48.441  info    TestRunner  at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:229)
06-23 13:04:48.441  info    TestRunner  at org.junit.runners.ParentRunner.access$000(ParentRunner.java:50)
06-23 13:04:48.441  info    TestRunner  at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:222)
06-23 13:04:48.441  info    TestRunner  at org.junit.runners.ParentRunner.run(ParentRunner.java:300)
06-23 13:04:48.441  info    TestRunner  at org.junit.runner.JUnitCore.run(JUnitCore.java:157)
06-23 13:04:48.441  info    TestRunner  at org.junit.runner.JUnitCore.run(JUnitCore.java:136)
06-23 13:04:48.441  info    TestRunner  at android.support.test.internal.runner.TestExecutor.execute(TestExecutor.java:54)
06-23 13:04:48.441  info    TestRunner  at android.support.test.runner.AndroidJUnitRunner.onStart(AndroidJUnitRunner.java:228)
06-23 13:04:48.441  info    TestRunner  at android.app.Instrumentation$InstrumentationThread.run(Instrumentation.java:1837)
06-23 13:04:48.441  info    TestRunner  ----- end exception -----
06-23 13:04:48.443  info    TestRunner  finished: WhenNavigatingToReportsThenCorrectViewShouldBeShown(com.myapp.ui.views.MainActivityTest)

我有一个简单的应用程序,导航到此时只包含文本的页面,测试应导航到每个页面并识别此文本.

@RunWith(AndroidJUnit4.class)
@LargeTest
public class MainActivityTest {

@Rule
public ActivityTestRule<MainActivity> mActivityRule = new ActivityTestRule(MainActivity.class);
private MainActivity mainActivity;

@Before
public void setActivity() {
    mainActivity = mActivityRule.getActivity();
}

 @Test
public void WhenNavigatingToReportsThenCorrectViewShouldBeShown() {
    onView(allOf(withId(R.id.icon), hasSibling(withText(R.string.reports)))).perform(click());

    onView(withText("This is the Reports Activity.")).check(matches(isDisplayed()));
    Spoon.screenshot(mainActivity, "main_view");
}
}

此故障仅发生在真实设备上.在模拟设备上,测试工作正常.见下图.

所有测试都由gradle脚本执行,从删除之前的应用程序和测试api开始,然后再重新安装.确保环境清洁.日志表明卸载成功.然后部署新应用程序并开始运行测试.现在他们失败了.

如果测试失败,直到我手动从设备中删除应用程序和测试api,我才能再次成功进行测试.但只有一段时间,直到出现相同的错误.

为什么我会得到NoActivityResumedException,我找不到它是什么以及何时发生的好例子.

Answer 1

我有同样的问题.当设备上的屏幕关闭时会发生这种情况.打开屏幕应该解决问题.

Answer 2

您可以在使用Uiautomator进行每次测试之前唤醒设备.

@Before
public void init(){
     UiDevice uiDevice = UiDevice.getInstance(InstrumentationRegistry.getInstrumentation());
     Point[] coordinates = new Point[4];
     coordinates[0] = new Point(248, 1520);
     coordinates[1] = new Point(248, 929);
     coordinates[2] = new Point(796, 1520);
     coordinates[3] = new Point(796, 929);
     try {
         if (!uiDevice.isScreenOn()) {
             uiDevice.wakeUp();
             uiDevice.swipe(coordinates, 10);
         }
     } catch (RemoteException e) {
         e.printStackTrace();
     }
}