小贝子编程

浓缩咖啡空闲资源无法与Recyler View一起使用



我已经开发了一个应用程序，在单击它之后，我必须在其中测试回收器视图和某些操作。我为此写了测试用例，但是测试失败了，因为浓缩咖啡直到加载回收器视图后才等待。我已经实施了SimpleIdlingResource，尽管它没有用。请给我一些关于修复相同的想法。

以下是运行测试用例时的错误。

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 hub链接：

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

我通过开发一个名为Message Delayer的类纠正了错误。

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是等待下一个测试案例的时间。简单的空闲资源可以如下使用。

  1. 在活动中定义SimpleIdlingResource。
@Nullable
private SimpleIdlingResource mIdlingResource;
  1. 在相同的活动中实现方法getIdlingResource((并创建实例。
  @VisibleForTesting
    @NonNull
    public IdlingResource getIdlingResource() {
        if (mIdlingResource == null) {
            mIdlingResource = new SimpleIdlingResource();
        }
        return mIdlingResource;
    }
  1. 调用getIdlingResource((方法，然后setIdlestate从测试应开始等待的位置为false。
getIdlingResource();  
if (mIdlingResource != null){
     mIdlingResource.setIdleState(false);
}
  1. 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编写单独的测试用例进行活动测试和意图测试。不要忘记在浓缩咖啡测试方法中注册和注册资源，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);
        }
    }
}

要进一步澄清我的github repo并检查。

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