Espresso :如何测试ImageButton的背景可绘制

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.action.ViewActions.click;
import static androidx.test.espresso.assertion.ViewAssertions.matches;
import static androidx.test.espresso.matcher.ViewMatchers.withBackground;
import static androidx.test.espresso.matcher.ViewMatchers.withId;

@RunWith(AndroidJUnit4.class)
public class ImageButtonTest {

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

    @Test
    public void testImageButtonBackgroundDrawable() {
        // 定位ImageButton并点击
        Espresso.onView(ViewMatchers.withId(R.id.imageButton)).perform(click());

        // 验证ImageButton的背景可绘制是否符合预期
        Espresso.onView(withId(R.id.imageButton)).check(matches(withBackground(R.drawable.background_drawable)));
    }
}