Some assertions to help with testing recyclerview with espresso.

RecyclerViewAssertions.java

import android.support.test.espresso.NoMatchingViewException;
import android.support.test.espresso.ViewAssertion;
import android.support.v7.widget.RecyclerView;
import android.view.View;
import com.google.common.truth.Truth;
import java.util.ArrayList;
import org.hamcrest.Matcher;
import org.junit.Assert;

import static android.view.View.FIND_VIEWS_WITH_TEXT;


public final class RecyclerViewAssertions {

  public static ViewAssertion hasItemsCount(final int count) {
    return new ViewAssertion() {
      @Override public void check(View view, NoMatchingViewException e) {
        if (!(view instanceof RecyclerView)) {
          throw e;
        }
        RecyclerView rv = (RecyclerView) view;
        Truth.assertThat(rv.getAdapter().getItemCount()).isEqualTo(count);
      }
    };
  }

  public static ViewAssertion hasHolderItemAtPosition(final int index,
      final Matcher<RecyclerView.ViewHolder> viewHolderMatcher) {
    return new ViewAssertion() {
      @Override public void check(View view, NoMatchingViewException e) {
        if (!(view instanceof RecyclerView)) {
          throw e;
        }
        RecyclerView rv = (RecyclerView) view;
        Assert.assertThat(rv.findViewHolderForAdapterPosition(index), viewHolderMatcher);
      }
    };
  }

  public static ViewAssertion hasViewWithTextAtPosition(final int index, final CharSequence text) {
    return new ViewAssertion() {
      @Override public void check(View view, NoMatchingViewException e) {
        if (!(view instanceof RecyclerView)) {
          throw e;
        }
        RecyclerView rv = (RecyclerView) view;
        ArrayList<View> outviews = new ArrayList<>();
        rv.findViewHolderForAdapterPosition(index).itemView.findViewsWithText(outviews, text,
            FIND_VIEWS_WITH_TEXT);
        Truth.assert_().withFailureMessage("There's no view at index "+ index + " of recyclerview that has text : "+ text)
                        .that(outviews).isNotEmpty();
      }
    };
  }

  public static ViewAssertion doesntHaveViewWithText(final String text) {
    return new ViewAssertion() {
      @Override public void check(View view, NoMatchingViewException e) {
        if (!(view instanceof RecyclerView)) {
          throw e;
        }
        RecyclerView rv = (RecyclerView) view;
        ArrayList<View> outviews = new ArrayList<>();
        for (int index = 0; index < rv.getAdapter().getItemCount(); index++) {
          rv.findViewHolderForAdapterPosition(index).itemView.findViewsWithText(outviews, text,
              FIND_VIEWS_WITH_TEXT);
          if (outviews.size() > 0) break;
        }
        Truth.assertThat(outviews).isEmpty();
      }
    };
  }
}