如何使用Espresso获取回收者视图列表项计数

androidTestImplementation 'androidx.test.espresso:espresso-core:<version>'

import androidx.test.espresso.Espresso;
import androidx.test.espresso.matcher.ViewMatchers;
import androidx.test.rule.ActivityTestRule;

import org.junit.Rule;
import org.junit.Test;

import static androidx.test.espresso.assertion.ViewAssertions.matches;
import static androidx.test.espresso.matcher.ViewMatchers.withId;

public class RecyclerViewItemCountTest {

    @Rule
    public ActivityTestRule<MainActivity> activityRule = new ActivityTestRule<>(MainActivity.class);

    @Test
    public void testRecyclerViewItemCount() {
        Espresso.onView(ViewMatchers.withId(R.id.recyclerView))
                .check(matches(RecyclerViewItemCountAssertion.withItemCount(5)));
    }
}