浓缩咖啡空闲资源不与 recyclerview 一起使用答案

【问题标题】：Espresso Idling Resource not working with recyler view浓缩咖啡空闲资源不与 recyclerview 一起使用
【发布时间】：2018-08-04 11:55:45
【问题描述】：

我开发了一个应用程序，我必须在其中测试回收器视图和单击它后的某些操作。我为此编写了测试用例但是测试失败了，因为浓缩咖啡没有等到加载回收站视图。我已经实现了 SimpleIdlingResource，虽然它没有用。请提供一些解决问题的想法。

以下是运行测试用例时遇到的错误。

Testing started at 5:18 PM ...

02/24 17:18:01: Launching BakingActivityEspres... $ adb push /Users/nizamudeenms/Documents/BakingApp/app/build/outputs/apk/debug/app-debug.apk /data/local/tmp/com.example.nizam.bakingapp $ adb shell pm install -t
-r "/data/local/tmp/com.example.nizam.bakingapp" Success


No apk changes detected since last installation, skipping installation of /Users/nizamudeenms/Documents/BakingApp/app/build/outputs/apk/androidTest/debug/app-debug-androidTest.apk $ adb shell am force-stop com.example.nizam.bakingapp.test Running tests

$ adb shell am instrument -w -r   -e debug false -e class com.example.nizam.bakingapp.BakingActivityEspressoTest com.example.nizam.bakingapp.test/android.support.test.runner.AndroidJUnitRunner Client not ready yet.. Started running tests

android.support.test.espresso.base.DefaultFailureHandler$AssertionFailedWithCauseError: 'is displayed on the screen to the user' doesn't match the selected view. Expected: is displayed on the screen to the user Got: "RecyclerView{id=2131230869, res-name=recycler_view, visibility=INVISIBLE, width=1080, height=0, has-focus=false, has-focusable=false, has-window-focus=true, is-clickable=false, is-enabled=true, is-focused=false, is-focusable=true, is-layout-requested=false, is-selected=false, root-is-layout-requested=false, has-input-connection=false, x=0.0, y=0.0, child-count=0}"

at dalvik.system.VMStack.getThreadStackTrace(Native Method) at java.lang.Thread.getStackTrace(Thread.java:1536) at android.support.test.espresso.base.DefaultFailureHandler.getUserFriendlyError(DefaultFailureHandler.java:92) at android.support.test.espresso.base.DefaultFailureHandler.handle(DefaultFailureHandler.java:56) at android.support.test.espresso.ViewInteraction.runSynchronouslyOnUiThread(ViewInteraction.java:184) at android.support.test.espresso.ViewInteraction.check(ViewInteraction.java:158) at com.example.nizam.bakingapp.BakingActivityEspressoTest.ensureRecyclerViewExists(BakingActivityEspressoTest.java:45) at java.lang.reflect.Method.invoke(Native Method) at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50) at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12) at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47) at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17) at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26) at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27) at android.support.test.internal.statement.UiThreadStatement.evaluate(UiThreadStatement.java:55) at android.support.test.rule.ActivityTestRule$ActivityStatement.evaluate(ActivityTestRule.java:270) at org.junit.rules.RunRules.evaluate(RunRules.java:20) at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57) at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290) at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71) at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288) at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58) at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268) at org.junit.runners.ParentRunner.run(ParentRunner.java:363) at org.junit.runners.Suite.runChild(Suite.java:128) at org.junit.runners.Suite.runChild(Suite.java:27) at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290) at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71) at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288) at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58) at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268) at org.junit.runners.ParentRunner.run(ParentRunner.java:363) at org.junit.runner.JUnitCore.run(JUnitCore.java:137) at org.junit.runner.JUnitCore.run(JUnitCore.java:115) at android.support.test.internal.runner.TestExecutor.execute(TestExecutor.java:59) at android.support.test.runner.AndroidJUnitRunner.onStart(AndroidJUnitRunner.java:262) at android.app.Instrumentation$InstrumentationThread.run(Instrumentation.java:2081) Caused by: junit.framework.AssertionFailedError: 'is displayed on the screen to the user' doesn't match the selected view. Expected: is displayed on the screen to the user Got: "RecyclerView{id=2131230869, res-name=recycler_view, visibility=INVISIBLE, width=1080, height=0, has-focus=false, has-focusable=false, has-window-focus=true, is-clickable=false, is-enabled=true, is-focused=false, is-focusable=true, is-layout-requested=false, is-selected=false, root-is-layout-requested=false, has-input-connection=false, x=0.0, y=0.0, child-count=0}"

at android.support.test.espresso.matcher.ViewMatchers.assertThat(ViewMatchers.java:1053) at android.support.test.espresso.assertion.ViewAssertions$2.check(ViewAssertions.java:89) at android.support.test.espresso.ViewInteraction$2.run(ViewInteraction.java:170) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:457) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at android.os.Handler.handleCallback(Handler.java:789) at android.os.Handler.dispatchMessage(Handler.java:98) at android.os.Looper.loop(Looper.java:172) at android.app.ActivityThread.main(ActivityThread.java:6637) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:767)


android.support.test.espresso.PerformException: Error performing 'actionOnItemAtPosition performing ViewAction: single click on item at position: 1' on view 'with id: com.example.nizam.bakingapp:id/recycler_view'. at android.support.test.espresso.PerformException$Builder.build(PerformException.java:83) at android.support.test.espresso.base.DefaultFailureHandler.getUserFriendlyError(DefaultFailureHandler.java:80) at android.support.test.espresso.base.DefaultFailureHandler.handle(DefaultFailureHandler.java:56) at android.support.test.espresso.ViewInteraction.runSynchronouslyOnUiThread(ViewInteraction.java:184) at android.support.test.espresso.ViewInteraction.doPerform(ViewInteraction.java:115) at android.support.test.espresso.ViewInteraction.perform(ViewInteraction.java:87) at com.example.nizam.bakingapp.BakingActivityEspressoTest.ensureStepsListExists(BakingActivityEspressoTest.java:55) at java.lang.reflect.Method.invoke(Native Method) at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50) at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12) at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47) at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17) at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26) at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27) at android.support.test.internal.statement.UiThreadStatement.evaluate(UiThreadStatement.java:55) at android.support.test.rule.ActivityTestRule$ActivityStatement.evaluate(ActivityTestRule.java:270) at org.junit.rules.RunRules.evaluate(RunRules.java:20) at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57) at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290) at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71) at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288) at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58) at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268) at org.junit.runners.ParentRunner.run(ParentRunner.java:363) at org.junit.runners.Suite.runChild(Suite.java:128) at org.junit.runners.Suite.runChild(Suite.java:27) at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290) at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71) at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288) at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58) at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268) at org.junit.runners.ParentRunner.run(ParentRunner.java:363) at org.junit.runner.JUnitCore.run(JUnitCore.java:137) at org.junit.runner.JUnitCore.run(JUnitCore.java:115) at android.support.test.internal.runner.TestExecutor.execute(TestExecutor.java:59) at android.support.test.runner.AndroidJUnitRunner.onStart(AndroidJUnitRunner.java:262) at android.app.Instrumentation$InstrumentationThread.run(Instrumentation.java:2081) Caused by: java.lang.RuntimeException: Action will not be performed because the target view does not match one or more of the following constraints: (is assignable from class: class android.support.v7.widget.RecyclerView and is displayed on the screen to the user) Target view: "RecyclerView{id=2131230869, res-name=recycler_view, visibility=INVISIBLE, width=1080, height=0, has-focus=false, has-focusable=false, has-window-focus=true, is-clickable=false, is-enabled=true, is-focused=false, is-focusable=true, is-layout-requested=false, is-selected=false, root-is-layout-requested=false, has-input-connection=false, x=0.0, y=0.0, child-count=0}" at android.support.test.espresso.ViewInteraction$1.run(ViewInteraction.java:138) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:457) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at android.os.Handler.handleCallback(Handler.java:789) at android.os.Handler.dispatchMessage(Handler.java:98) at android.os.Looper.loop(Looper.java:172) at android.app.ActivityThread.main(ActivityThread.java:6637) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:767)


android.support.test.espresso.PerformException: Error performing 'actionOnItemAtPosition performing ViewAction: single click on item at position: 1' on view 'with id: com.example.nizam.bakingapp:id/recycler_view'. at android.support.test.espresso.PerformException$Builder.build(PerformException.java:83) at android.support.test.espresso.base.DefaultFailureHandler.getUserFriendlyError(DefaultFailureHandler.java:80) at android.support.test.espresso.base.DefaultFailureHandler.handle(DefaultFailureHandler.java:56) at android.support.test.espresso.ViewInteraction.runSynchronouslyOnUiThread(ViewInteraction.java:184) at android.support.test.espresso.ViewInteraction.doPerform(ViewInteraction.java:115) at android.support.test.espresso.ViewInteraction.perform(ViewInteraction.java:87) at com.example.nizam.bakingapp.BakingActivityEspressoTest.ensureIngredientListExists(BakingActivityEspressoTest.java:61) at java.lang.reflect.Method.invoke(Native Method) at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50) at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12) at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47) at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17) at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26) at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27) at android.support.test.internal.statement.UiThreadStatement.evaluate(UiThreadStatement.java:55) at android.support.test.rule.ActivityTestRule$ActivityStatement.evaluate(ActivityTestRule.java:270) at org.junit.rules.RunRules.evaluate(RunRules.java:20) at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57) at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290) at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71) at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288) at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58) at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268) at org.junit.runners.ParentRunner.run(ParentRunner.java:363) at org.junit.runners.Suite.runChild(Suite.java:128) at org.junit.runners.Suite.runChild(Suite.java:27) at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290) at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71) at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288) at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58) at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268) at org.junit.runners.ParentRunner.run(ParentRunner.java:363) at org.junit.runner.JUnitCore.run(JUnitCore.java:137) at org.junit.runner.JUnitCore.run(JUnitCore.java:115) at android.support.test.internal.runner.TestExecutor.execute(TestExecutor.java:59) at android.support.test.runner.AndroidJUnitRunner.onStart(AndroidJUnitRunner.java:262) at android.app.Instrumentation$InstrumentationThread.run(Instrumentation.java:2081) Caused by: java.lang.RuntimeException: Action will not be performed because the target view does not match one or more of the following constraints: (is assignable from class: class android.support.v7.widget.RecyclerView and is displayed on the screen to the user) Target view: "RecyclerView{id=2131230869, res-name=recycler_view, visibility=INVISIBLE, width=1080, height=0, has-focus=false, has-focusable=false, has-window-focus=true, is-clickable=false, is-enabled=true, is-focused=false, is-focusable=true, is-layout-requested=false, is-selected=false, root-is-layout-requested=false, has-input-connection=false, x=0.0, y=0.0, child-count=0}" at android.support.test.espresso.ViewInteraction$1.run(ViewInteraction.java:138) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:457) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at android.os.Handler.handleCallback(Handler.java:789) at android.os.Handler.dispatchMessage(Handler.java:98) at android.os.Looper.loop(Looper.java:172) at android.app.ActivityThread.main(ActivityThread.java:6637) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:767)


android.support.test.espresso.PerformException: Error performing 'load adapter data' on view 'with id: com.example.nizam.bakingapp:id/steps_list_recycler_view'. at android.support.test.espresso.PerformException$Builder.build(PerformException.java:83) at android.support.test.espresso.base.DefaultFailureHandler.getUserFriendlyError(DefaultFailureHandler.java:80) at android.support.test.espresso.base.DefaultFailureHandler.handle(DefaultFailureHandler.java:56) at android.support.test.espresso.ViewInteraction.runSynchronouslyOnUiThread(ViewInteraction.java:184) at android.support.test.espresso.ViewInteraction.doPerform(ViewInteraction.java:115) at android.support.test.espresso.ViewInteraction.perform(ViewInteraction.java:87) at android.support.test.espresso.DataInteraction.load(DataInteraction.java:151) at android.support.test.espresso.DataInteraction.perform(DataInteraction.java:128) at com.example.nizam.bakingapp.BakingActivityEspressoTest.checkPlayerViewIsVisible_RecipeDetailActivity1(BakingActivityEspressoTest.java:68) at java.lang.reflect.Method.invoke(Native Method) at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50) at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12) at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47) at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17) at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26) at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27) at android.support.test.internal.statement.UiThreadStatement.evaluate(UiThreadStatement.java:55) at android.support.test.rule.ActivityTestRule$ActivityStatement.evaluate(ActivityTestRule.java:270) at org.junit.rules.RunRules.evaluate(RunRules.java:20) at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57) at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290) at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71) at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288) at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58) at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268) at org.junit.runners.ParentRunner.run(ParentRunner.java:363) at org.junit.runners.Suite.runChild(Suite.java:128) at org.junit.runners.Suite.runChild(Suite.java:27) at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290) at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71) at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288) at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58) at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268) at org.junit.runners.ParentRunner.run(ParentRunner.java:363) at org.junit.runner.JUnitCore.run(JUnitCore.java:137) at org.junit.runner.JUnitCore.run(JUnitCore.java:115) at android.support.test.internal.runner.TestExecutor.execute(TestExecutor.java:59) at android.support.test.runner.AndroidJUnitRunner.onStart(AndroidJUnitRunner.java:262) at android.app.Instrumentation$InstrumentationThread.run(Instrumentation.java:2081) Caused by: java.lang.RuntimeException: Action will not be performed because the target view does not match one or more of the following constraints: (is assignable from class: class android.widget.AdapterView and is displayed on the screen to the user) Target view: "RecyclerView{id=2131230916, res-name=steps_list_recycler_view, visibility=VISIBLE, width=1028, height=742, has-focus=false, has-focusable=true, has-window-focus=true, is-clickable=false, is-enabled=true, is-focused=false, is-focusable=true, is-layout-requested=false, is-selected=false, root-is-layout-requested=false, has-input-connection=false, x=0.0, y=0.0, child-count=7}" at android.support.test.espresso.ViewInteraction$1.run(ViewInteraction.java:138) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:457) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at android.os.Handler.handleCallback(Handler.java:789) at android.os.Handler.dispatchMessage(Handler.java:98) at android.os.Looper.loop(Looper.java:172) at android.app.ActivityThread.main(ActivityThread.java:6637) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:767)

Tests ran to completion.

Git 中心链接：

https://github.com/nizamudeenms/BakingApp/commits/master

【问题讨论】：

您找到解决问题的方法了吗？
@user1055395 是的，请在下面找到答案。

标签： android android-recyclerview android-espresso android-testing

【解决方案1】：

我通过开发一个名为 Message delayer 的类来纠正错误。

class MessageDelayer {

    private static final int DELAY_MILLIS = 5000;

    interface DelayerCallback {
        void onDone(String text);
    }

    /**
     * Takes a String and returns it after {@link #DELAY_MILLIS} via a {@link DelayerCallback}.
     * @param message the String that will be returned via the callback
     * @param callback used to notify the caller asynchronously
     */
    static void processMessage(final String message, final DelayerCallback callback,
                               @Nullable final SimpleIdlingResource idlingResource) {
        // The IdlingResource is null in production.
        if (idlingResource != null) {
            idlingResource.setIdleState(false);
        }

        // Delay the execution, return message via callback.
        Handler handler = new Handler();
        handler.postDelayed(new Runnable() {
            @Override
            public void run() {
                if (callback != null) {
                    callback.onDone(message);
                    if (idlingResource != null) {
                        idlingResource.setIdleState(true);
                    }
                }
            }
        }, DELAY_MILLIS);

    }
}

DELAY_MILLIS 是等待下一个测试用例开始的时间。简单的idling资源可以如下使用。

在 Activity 中定义 SimpleIdlingResource。

@Nullable
private SimpleIdlingResource mIdlingResource;

在同一个activity中实现getIdlingResource()方法并创建实例。

  @VisibleForTesting
    @NonNull
    public IdlingResource getIdlingResource() {
        if (mIdlingResource == null) {
            mIdlingResource = new SimpleIdlingResource();
        }
        return mIdlingResource;
    }

调用 getIdlingResource() 方法并将 setIdleState 从测试开始等待的位置设置为 false。

getIdlingResource();  
if (mIdlingResource != null){
     mIdlingResource.setIdleState(false);
}

最后调用processMessage()方法。

final String text = "Sample Text";
 MessageDelayer.processMessage(text, this, mIdlingResource);

我们必须在不同的类文件中为 Activity Test 和 Intent Test 编写单独的测试用例。不要忘记在espresso测试方法中注册和注销资源，如下所示。

活动测试

@RunWith(AndroidJUnit4.class)
@LargeTest
public class BakingActivityEspressoTest {
    @Rule
    public ActivityTestRule<BakingActivity> mActivityRule = new ActivityTestRule<>(BakingActivity.class);

    private IdlingResource mIdlingResource;

    @Before
    public void registerIdlingResource() {
        mIdlingResource = mActivityRule.getActivity().getIdlingResource();
        Espresso.registerIdlingResources(mIdlingResource);
    }

    @Test
    public void ensureRecyclerViewExists() {
        onView(ViewMatchers.withId(R.id.recycler_view)).perform(RecyclerViewActions.scrollToPosition(1));
        onView(withText("Brownies")).check(matches(isDisplayed()));
    }

    @Test
    public void checkPlayerViewIsVisible_RecipeDetailActivity1() {
        onView(ViewMatchers.withId(R.id.recycler_view)).perform(RecyclerViewActions.actionOnItemAtPosition(0, click()));
        onView(ViewMatchers.withId(R.id.steps_list_recycler_view)).perform(RecyclerViewActions.actionOnItemAtPosition(0, click()));
        onView(withId(R.id.exo_player_view)).check(matches(isDisplayed()));
    }

    @After
    public void unregisterIdlingResource() {
        if (mIdlingResource != null) {
            Espresso.unregisterIdlingResources(mIdlingResource);
        }
    }
}

意图测试

@RunWith(AndroidJUnit4.class)
public class BakingIntentEspressoTest {
    private IdlingResource mIdlingResource;

    @Rule
    public IntentsTestRule<BakingActivity> intentsTestRule = new IntentsTestRule<>(
            BakingActivity.class);

    @Before
    public void registerIdlingResource() {
        mIdlingResource = intentsTestRule.getActivity().getIdlingResource();
        Espresso.registerIdlingResources(mIdlingResource);
        // Stub all external intents
        intending(not(isInternal())).respondWith(new Instrumentation.ActivityResult(Activity.RESULT_OK, null));
    }

    @Test
    public void checkBakingRecyclerViewItemHasIntentWithAKey() {
        onView(withId(R.id.recycler_view)).perform(RecyclerViewActions.actionOnItemAtPosition(1, click()));
        intended(hasExtraWithKey("bakingId"));
    }

    @After
    public void unregisterIdlingResource() {
        if (mIdlingResource != null) {
            Espresso.unregisterIdlingResources(mIdlingResource);
        }
    }
}

如需进一步说明，请访问我的 github 存储库并检查。

【讨论】：