SpringBoot Mockito 依赖注入

1 添加依赖

<dependency>
	<groupId>org.springframework.boot</groupId>
	<artifactId>spring-boot-starter-test</artifactId>
	<scope>test</scope>
</dependency>

<dependency>
	<groupId>junit</groupId>
	<artifactId>junit</artifactId>
	<version>4.13.2</version>
	<scope>test</scope>
</dependency>

2 @Mock @MockBean @InjectMocks

3 @ExtendWith(MockitoExtension.class) @RunWith(MockitoJUnitRunner.class)

@ExtendWith(MockitoExtension.class) 是 Mockito 框架从 JUnit 5 开始引入的一种新的测试扩展机制。它取代了之前在 JUnit 4 中使用的 @RunWith(MockitoJUnitRunner.class) 注解。
MockitoExtension 是 JUnit 5 提供的一个扩展接口,Mockito 实现了这个接口,使 Mockito 能够集成到 JUnit 5 测试框架中。通过使用 @ExtendWith(MockitoExtension.class) 注解,可以在 JUnit 5 测试中使用 Mockito 的模拟功能。
使用 @ExtendWith(MockitoExtension.class) 注解后,你就可以直接使用 @Mock、@Spy、@Captor 等 Mockito 注解来创建和管理模拟对象,而不需要手动初始化这些模拟对象。同时,也不再需要使用 @RunWith 注解。

4 Mockito 单元测试

4.1 JunitTestService

package com.xu.test.service;

public interface JunitTestService {

    String test(String a);

}

4.2 JunitTestServiceImpl

package com.xu.test.service.impl;

import com.xu.test.service.JunitTestService;
import org.springframework.stereotype.Service;

@Service
public class JunitTestServiceImpl implements JunitTestService {

    @Override
    public String test(String a) {
        return a.concat(" Mockito");
    }

}

4.3 TestService

package com.xu.test.service;

import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;

public interface TestService {

    String test1(String a, Integer b);

    void test2(HttpServletRequest request, HttpServletResponse response, String a, Integer b);

}

4.4 TestServiceImpl

package com.xu.test.service.impl;

import cn.hutool.core.util.StrUtil;
import com.xu.test.service.JunitTestService;
import com.xu.test.service.TestService;
import jakarta.annotation.Resource;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import org.springframework.stereotype.Service;

@Service
public class TestServiceImpl implements TestService {

    @Resource
    private JunitTestService testService;

    @Override
    public String test1(String a, Integer b) {
        if (StrUtil.equals("test", a)) {
            testService.test(a);
            return "b";
        }
        return "a";
    }

    @Override
    public void test2(HttpServletRequest request, HttpServletResponse response, String a, Integer b) {
        if (StrUtil.equals("test", a)) {
            System.out.println(a);
        }
        System.out.println(b);
    }

    private static String getNewStr(String a) {
        return a.concat("单元测试");
    }

}

4.5 MockTest

package com.xu.test;

import com.xu.test.service.JunitTestService;
import com.xu.test.service.TestService;
import com.xu.test.service.impl.TestServiceImpl;
import org.junit.Before;
import org.junit.Test;
import org.junit.jupiter.api.extension.ExtendWith;
import org.mockito.InjectMocks;
import org.mockito.Mock;
import org.mockito.Mockito;
import org.mockito.MockitoAnnotations;
import org.mockito.junit.jupiter.MockitoExtension;

@ExtendWith(MockitoExtension.class)
public class MockTest {

    @Mock
    private JunitTestService testService;

    @InjectMocks
    public TestService userService = new TestServiceImpl();

    @Before
    public void setUp() {
        MockitoAnnotations.openMocks(this);
    }

    @Test
    public void testMock() {
        Mockito.when(userService.test1("test", 10)).thenReturn("a");
    }

}