SpringBoot에서 프로젝트 테스트 클래스를 구현하는 방법

package soundsystem;

import static org.junit.Assert.*;

import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(classes=CDPlayerConfig.class)
public class CDPlayerTest {

 @Autowired
 private CompactDisc cd;

 @Test
 public void cdShouldNotBeNull() {
  assertNotNull(cd);
 }

}