如何模拟Spring数据和单元测试服务

import org.junit.Test;
import org.mockito.Mockito;

public class MyRepositoryTest {

    @Test
    public void testFindById() {
        // 创建模拟的数据访问对象
        MyRepository myRepository = Mockito.mock(MyRepository.class);

        // 定义模拟对象的行为
        Mockito.when(myRepository.findById(1L)).thenReturn(new MyEntity(1L, "example"));

        // 调用被测试的代码
        MyService myService = new MyService(myRepository);
        MyEntity result = myService.findById(1L);

        // 验证结果
        Assert.assertEquals(1L, result.getId());
        Assert.assertEquals("example", result.getName());
    }
}

import org.junit.Assert;
import org.junit.Test;

public class MyServiceTest {

    @Test
    public void testFindById() {
        // 创建被测试的对象
        MyRepository myRepository = new MyRepository();
        MyService myService = new MyService(myRepository);

        // 调用被测试的方法
        MyEntity result = myService.findById(1L);

        // 验证结果
        Assert.assertEquals(1L, result.getId());
        Assert.assertEquals("example", result.getName());
    }
}