Utils.java

package com.nononsenseapps.notepad.test;

import android.support.annotation.NonNull;
import android.support.test.espresso.matcher.BoundedMatcher;
import android.support.v7.widget.RecyclerView;
import android.view.View;
import org.hamcrest.Description;
import org.hamcrest.Matcher;

public class Utils {
    /**
     * Assertion on recyclerview item.
     */
    public static Matcher<View> assertionOnItemAtPosition(final int position, @NonNull final Matcher<View> itemMatcher) {
        return new BoundedMatcher<View, RecyclerView>(RecyclerView.class) {
            @Override
            public void describeTo(Description description) {
                description.appendText("item at " + position + ": ");
                itemMatcher.describeTo(description);
            }

            @Override
            protected boolean matchesSafely(final RecyclerView view) {
                RecyclerView.ViewHolder viewHolder = view.findViewHolderForAdapterPosition(position);
                return viewHolder != null && itemMatcher.matches(viewHolder.itemView);
            }
        };
    }
}