无法在测试spring boot jpa中断言更新值

import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.autoconfigure.orm.jpa.DataJpaTest;
import org.springframework.boot.test.autoconfigure.orm.jpa.TestEntityManager;

import static org.assertj.core.api.Assertions.assertThat;

@DataJpaTest
public class MyEntityRepositoryTest {

    @Autowired
    private TestEntityManager entityManager;

    @Autowired
    private MyEntityRepository myEntityRepository;

    @Test
    public void testUpdateValue() {
        // 创建一个实体对象
        MyEntity entity = new MyEntity();
        entity.setName("Test");
        entity.setValue(10);

        // 保存实体对象到数据库
        entityManager.persist(entity);
        entityManager.flush();

        // 查询保存的实体对象
        MyEntity savedEntity = myEntityRepository.findById(entity.getId()).orElse(null);

        // 断言更新的属性值是否正确
        assertThat(savedEntity).isNotNull();
        assertThat(savedEntity.getValue()).isEqualTo(10);

        // 更新属性值
        savedEntity.setValue(20);
        myEntityRepository.save(savedEntity);

        // 再次查询实体对象
        MyEntity updatedEntity = myEntityRepository.findById(entity.getId()).orElse(null);

        // 断言更新的属性值是否正确
        assertThat(updatedEntity).isNotNull();
        assertThat(updatedEntity.getValue()).isEqualTo(20);
    }
}