如何使用Espresso测试片段是否可见

androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'

import androidx.test.espresso.Espresso;
import androidx.test.espresso.matcher.ViewMatchers;
import androidx.test.ext.junit.rules.ActivityScenarioRule;
import androidx.test.ext.junit.runners.AndroidJUnit4;

import org.junit.Rule;
import org.junit.Test;
import org.junit.runner.RunWith;

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

@RunWith(AndroidJUnit4.class)
public class VisibilityTest {

    @Rule
    public ActivityScenarioRule<MainActivity> activityScenarioRule = new ActivityScenarioRule<>(MainActivity.class);

    @Test
    public void testFragmentVisibility() {
        // 检查片段是否可见
        Espresso.onView(withId(R.id.fragment_container))
                .check(matches(isDisplayed()));
    }
}