No virtual method findViewHolderForPosition(I) when trying to click on RecyclerView item with Espresso

Issue

I'm trying to make a simple espresso test that will find the first item in RecyclerView without specific label and click on it. To achieve this I added espresso-contrib to project like this:

androidTestCompile('com.android.support.test.espresso:espresso-contrib:2.2.2') {
    // Necessary to avoid version conflicts
    exclude group: 'com.android.support', module: 'appcompat'
    exclude group: 'com.android.support', module: 'design'
    exclude group: 'com.android.support', module: 'support-v4'
    exclude group: 'com.android.support', module: 'appcompat-v7'
    exclude group: 'com.android.support', module: 'support-annotations'
    exclude module: 'recyclerview-v7'
}

and wrote the following expression in my test case: onView(withId(R.id.sresults_list_recycler)).perform(RecyclerViewActions.actionOnHolderItem(new FirstNotSoldOutMatcher(), click()).atPosition(1));

Matcher works perfectly and RecyclerView got scrolled to the target item. But then I get error:

java.lang.NoSuchMethodError: No virtual method findViewHolderForPosition(I)Landroid/support/v7/widget/RecyclerView$ViewHolder; in class Landroid/support/v7/widget/RecyclerView; or its super classes (declaration of 'android.support.v7.widget.RecyclerView' appears in /data/app/com.example-1/base.apk)
at android.support.test.espresso.contrib.RecyclerViewActions$ActionOnItemAtPositionViewAction.perform(RecyclerViewActions.java:288)
at android.support.test.espresso.contrib.RecyclerViewActions$ActionOnItemViewAction.perform(RecyclerViewActions.java:232)
at android.support.test.espresso.ViewInteraction$1.run(ViewInteraction.java:144)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:428)
at java.util.concurrent.FutureTask.run(FutureTask.java:237)
at android.os.Handler.handleCallback(Handler.java:751)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6077)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:865)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:755)

This looks strange to me. I read in Google documentation that findViewHolderForPosition method is deprecated now but it should still be there. I also have multidex enabled in the app but according to docs it is supported out of the box so shouldn't be a problem too.

Do you have any idea what can be wrong with this test?

Solution

Ok, in my case problem was in ProGuard shrinking unused methods. Disabling it for tests helped.

For future seekers - if you don't want to disable proguard for debug build adding this line to proguard config should help too:

-keepclasseswithmembers public class android.support.v7.widget.RecyclerView { *; }

Also, note that this rule should be added to the regular proguard file(the one of listed in proguardFiles) and not the test one(declared as testProguardFile)

Answered By - Bersh