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Junit+Mock

news 2025/9/18 5:32:06

base project

<parent><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-parent</artifactId><version>2.6.11</version><relativePath/></parent><dependencies><!--添加mysql依赖--><dependency><groupId>org.mariadb.jdbc</groupId><artifactId>mariadb-java-client</artifactId><version>2.7.2</version></dependency><dependency><groupId>com.baomidou</groupId><artifactId>mybatis-plus-boot-starter</artifactId><version>3.5.2</version></dependency><!--单元测试--><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-test</artifactId></dependency><!--junit4--><dependency><groupId>org.junit.vintage</groupId><artifactId>junit-vintage-engine</artifactId></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency><dependency><groupId>org.projectlombok</groupId><artifactId>lombok</artifactId></dependency>
</dependencies>

application.yaml

server:port: 8896spring:datasource:username: rootpassword: rooturl: jdbc:mariadb://local_IP_replace:3306/junit?serverTimezone=GMT%2B8&useSSL=false&allowPublicKeyRetrieval=truedriver-class-name: org.mariadb.jdbc.Driver

controller

@RestController
@RequestMapping("/ele")
public class EleController {private final IEleService eleService;@Autowiredpublic EleController(IEleService eleService) {this.eleService = eleService;}@GetMapping(value = "/selectEleById")public Result<Object> selectEleById(@RequestParam(value = "orderId") int orderId) {Object object = eleService.selectEleById(orderId);return Result.success(object);}@GetMapping(value = "/selectEleByIdAndName")public Result<Object> selectEleByIdAndName(@RequestParam(value = "id") int id, @RequestParam(value = "name") String name) {Object object = eleService.selectEleByIdAndName(id,name);return Result.success(object);}
}

service

public interface IEleService {Object selectEleById(int orderId);Object selectEleByIdAndName(int id, String name);
}

@Service
public class EleService implements IEleService {@Autowiredprivate IElementsMapper elementsMapper;@Overridepublic Object selectEleById(int orderId) {ElementsDO elementsDO = elementsMapper.selectById(orderId);return elementsDO;}@Overridepublic Object selectEleByIdAndName(int id, String name) {LambdaQueryWrapper<ElementsDO> queryWrapper = new LambdaQueryWrapper<>();queryWrapper.eq(ElementsDO::getId, id);queryWrapper.eq(ElementsDO::getElementName, name);ElementsDO elementsDO = elementsMapper.selectOne(queryWrapper);return elementsDO;}
}

mapper

@Mapper
public interface IElementsMapper extends BaseMapper<ElementsDO> {
}

entity

@Data
@Builder
@NoArgsConstructor
@AllArgsConstructor
@EqualsAndHashCode(callSuper = false)
@TableName("ELEMENTS")
public class ElementsDO implements Serializable {/*** id*/@TableId(value = "ID", type = IdType.AUTO)private Integer id;/*** 要素代码*/@TableField(value = "ELEMENT_CODE")private String elementCode;/*** 要素名称*/@TableField(value = "ELEMENT_NAME")private String elementName;/*** 单位*/@TableField(value = "UNIT")private String unit;
}

controller返回封装对象

@JsonInclude(JsonInclude.Include.NON_NULL)
public class Result<T> {private int code;private String msg="success";private T data;/***  成功时候的调用* */public static <T> Result<T> success() {Result<T> result = new Result<T>();result.code = 1;return result;}public static<T> Result<T> success(T data){return new Result<T>(data);}/***  失败时候的调用* */public static  <T> Result<T> error(CodeMsg codeMsg){return new Result<T>(codeMsg);}private Result(T data) {this.data = data;}private Result(int code, String msg) {this.code = code;this.msg = msg;}private Result() {}private Result(CodeMsg codeMsg) {if(codeMsg != null) {this.code = codeMsg.getCode();this.msg = codeMsg.getMsg();}}/*** BindingResult统一处理*/public static Result resolveBindResult(BindingResult bindingResult){StringBuilder stringBuilder = new StringBuilder();for (String s : bindingResult.getFieldErrors().stream().map(FieldError::getDefaultMessage).collect(Collectors.toList())) {stringBuilder.append(",").append(s);}return Result.error(new CodeMsg(502,stringBuilder.toString().substring(1)));}public int getCode() {return code;}public void setCode(int code) {this.code = code;}public String getMsg() {return msg;}public void setMsg(String msg) {this.msg = msg;}public T getData() {return data;}public void setData(T data) {this.data = data;}@Overridepublic String toString() {return "Result [code=" + code + ", msg=" + msg + ", data=" + data + "]";}}

Mock初始化

方式1

import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.extension.ExtendWith;
import org.mockito.Mock;
import org.mockito.Mockito;
import org.mockito.Spy;
import org.mockito.junit.jupiter.MockitoExtension;@ExtendWith(MockitoExtension.class)
public class Init1 {//初始化模拟对象@Mockprivate EleService eleService;//初始化真实对象@Spyprivate EleService eleService2;@Testpublic void test1(){boolean mock = Mockito.mockingDetails(eleService).isMock();System.out.println(mock);boolean mock1 = Mockito.mockingDetails(eleService2).isSpy();System.out.println(mock1);}
}

方式2

import org.junit.jupiter.api.BeforeEach;
@ExtendWith(MockitoExtension.class)
public class Init2 {private EleService eleService;//初始化@BeforeEachpublic void init() {eleService = Mockito.mock(EleService.class);}@Testpublic void test1(){//判断对象是否为muck对象boolean mock = Mockito.mockingDetails(eleService).isMock();System.out.println(mock);}
}

方式3

import org.junit.jupiter.api.BeforeEach;
@ExtendWith(MockitoExtension.class)
public class Init3 {//初始化模拟对象@Mockprivate EleService eleService;//初始化真实对象@Spyprivate EleService eleService2;//初始化@BeforeEachpublic void init() {//初始化当前类对象下的相关mockMockitoAnnotations.openMocks(this);}@Testpublic void test1(){boolean mock = Mockito.mockingDetails(eleService).isMock();System.out.println(mock);boolean mock1 = Mockito.mockingDetails(eleService2).isSpy();System.out.println(mock1);}
}

Mock默认返回值

int默认返回0，对象默认返回null，集合默认返回空集合（空的ArrayList、空的HashSet、空的HashMap）

@ExtendWith(MockitoExtension.class)
public class MockMethod1 {//初始化模拟对象@Mockprivate EleService eleService;@Testpublic void test1(){//Mock对象返回默认值,不会调用真正方法Object o1 = eleService.selectEleById(1);//nullSystem.out.println(o1);}
}

Mock参数设置

@ExtendWith(MockitoExtension.class)
public class MockMethod1 {//初始化模拟对象@Mockprivate EleService eleService;@Testpublic void test1(){/*** 插桩,只拦截参数为1*///指定参数为1时,selectEleById方法时返回new Object()Mockito.doReturn(new Object()).when(eleService).selectEleById(1);Object o2 = eleService.selectEleById(1);System.out.println(o2);//java.lang.Object@16b2bb0c}@Testpublic void test2(){/*** 插桩,拦截selectEleById()的任意参数值*/Mockito.doReturn(new Object()).when(eleService).selectEleById(ArgumentMatchers.any(Integer.class));Object o2 = eleService.selectEleById(2);System.out.println(o2);//java.lang.Object@c7045b9}
}
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