Mockito单测，mock service层的mapper

1、引入mockito jar包

<dependency>
   <groupId>org.mockitogroupId>
   <artifactId>mockito-allartifactId>
   <version>2.0.2-betaversion>
dependency>

2、对于Mockito而言，有两种方式创建：

1. mock为一个interface提供一个虚拟的实现，
2. spy为object加一个动态代理，实现部分方法的虚拟化

• @Mock，被标注的属性是个mock
• @Spy，被标注的属性是个spy，需要赋予一个instance。提供了一种对真实对象操作的方法
• @InjectMocks，将本test中的mock或者spy注入到被标注的属性中，根据构造函数的参数名，或者setter，或者私有属性名。

3、如果你使用spring，上述代码还可以进一步简化，因为Mockito提供了factory的方法用来创建mock和spy。

### 正常的bean声明

<bean id=”svc” class=”Svc”>
<bean id=”dao1” class=”…”>
<bean id=”dao2” class=”…”>

mock

<bean id="operationService" class="org.mockito.Mockito" factory-method="mock"> 
        <constructor-arg value="com.paincupid.api.operation.OperationService" /> 
    bean>

请注意到svc不变化，mock将自动注入进入。这是因为spring的bean容器，如果id一样，后声明的bean会覆盖前面的bean。

spy

<bean id="daoInst"  class="DaoInstance">bean>
<bean id="dao2"  class="org.mockito.Mockito" factory-method="spy">
       <constructor-arg ref="daoInst">constructor-arg>
bean>

同样svc不变化，直接注入。请注意spy需要获得一个实例。

4、如果不用xml的话，可以在java中注解的方式引入

FinanceServiceTest.java

package com.paincupid.springmvc.mybaitsgenerator.persistence.test;

import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;
import org.mockito.InjectMocks;
import org.mockito.Mock;
import org.mockito.Mockito;
import org.mockito.MockitoAnnotations;
import com.paincupid.springmvc.base.JUnitDaoBase;
import com.paincupid.springmvc.finance.domain.Finance;
import com.paincupid.springmvc.finance.persistence.FinanceMapper;
import com.paincupid.springmvc.finance.service.FinanceService;

public class FinanceServiceTest extends JUnitDaoBase{


    @InjectMocks
    FinanceService service;

    @Mock
    FinanceMapper mapper;

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

    @Test
    public void selectByExampleTest() {
        Finance f = Mockito.mock(Finance.class);;
        f.setBak("bak");
        f.setConsumer("consumer");
        String id = "1";

        Mockito.when(mapper.searchFinanceById(id)).thenReturn(f);
        Finance returnF = service.searchFinanceById(id);
        Mockito.verify(mapper).searchFinanceById(id);

        Assert.assertEquals(f.getConsumer(), returnF.getConsumer());

    }
}

JUnitDaoBase.java

package com.paincupid.springmvc.base;


import org.junit.runner.RunWith;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.AbstractTransactionalJUnit4SpringContextTests;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
import org.springframework.transaction.annotation.Transactional;

@RunWith(SpringJUnit4ClassRunner.class)  
//使用classpath，会自动去class下的目录去找，所以暂时把它放到了resource目录下。
@ContextConfiguration(locations = {"classpath:/junitTestContext.xml"})  
@Transactional
public  class JUnitDaoBase extends AbstractTransactionalJUnit4SpringContextTests {  


}  

配置文件junitTestContext.xml

<beans xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:aop="http://www.springframework.org/schema/aop"
    xmlns="http://www.springframework.org/schema/beans" xmlns:context="http://www.springframework.org/schema/context"
    xmlns:tx="http://www.springframework.org/schema/tx"
    xsi:schemaLocation="
           http://www.springframework.org/schema/aop     http://www.springframework.org/schema/aop/spring-aop-3.1.xsd
           http://www.springframework.org/schema/beans   http://www.springframework.org/schema/beans/spring-beans-3.1.xsd
           http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.1.xsd
           http://www.springframework.org/schema/tx      http://www.springframework.org/schema/tx/spring-tx-3.1.xsd
       "
    default-lazy-init="true">

    
    <context:component-scan base-package="com.paincupid.springmvc.*.service,com.paincupid.springmvc.*.persistence" />

    
    <bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
        <property name="messageConverters">
            <list>
                <ref bean="jsonHttpMessageConverter" />
            list>
        property>
    bean>
    <bean id="jsonHttpMessageConverter"
        class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">
        <property name="supportedMediaTypes">
            <list>
                <value>application/json;charset=UTF-8value>
            list>
        property>
    bean>



    
    
    
    <bean id="dataSource" class="com.jolbox.bonecp.BoneCPDataSource" destroy-method="close">
        <property name="driverClass" value="com.mysql.jdbc.Driver" />
        <property name="jdbcUrl" value="jdbc:mysql://localhost:3306/lee" />
        <property name="username" value="lee" />
        <property name="password" value="eee" />
        <property name="maxConnectionsPerPartition" value="30" />
        <property name="minConnectionsPerPartition" value="10" />
        <property name="partitionCount" value="1" />
        <property name="acquireIncrement" value="5" />
        <property name="statementsCacheSize" value="100" />
    bean>
    
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource" />
        
        <property name="typeAliasesPackage"
            value="com.paincupid.springmvc.system.domain,com.paincupid.springmvc.test.domain
            ,com.paincupid.springmvc.finance.domain" />
    bean>

    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.paincupid.springmvc.*.persistence" />
    bean>

    
    <bean name="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"
        scope="singleton">
        <property name="dataSource" ref="dataSource">property>
    bean>

    <tx:advice id="txAdvice" transaction-manager="transactionManager">
        <tx:attributes>
            <tx:method name="get*" read-only="true" />
            <tx:method name="select*" read-only="true" />
            <tx:method name="add*" isolation="READ_COMMITTED" rollback-for="Exception" />
            <tx:method name="update*" isolation="READ_COMMITTED" rollback-for="Exception" />
            <tx:method name="delete*" isolation="READ_COMMITTED" rollback-for="Exception" />
        tx:attributes>
    tx:advice>
    
    <aop:config>
        <aop:pointcut expression="execution(* com.paincupid.springmvc.*.service.*.*(..))" id="pointCut" />
        <aop:advisor advice-ref="txAdvice" pointcut-ref="pointCut" />
    aop:config>
beans>

5、其它

验证调用次数

verify(mock1, timeout(100).times(2)).get(anyInt());

除了代码中的方法，Mockito 还提供了
- never() 没有被调用，相当于times(0)
- atLeast(N) 至少被调用N次
- atLeastOnce() 相当于atLeast(1)
- atMost(N) 最多被调用N次
超时验证

通过 timeout 我们可以进行验证程序执行时间是否符合规则。
方法调用顺序

Inorder 可以验证方法调用的顺序
verifyNoMoreInteractions 和 verifyZeroInteractions

verifyNoMoreInteractions：查询是否存在被调用，但未被 verify 验证的方法

verifyZeroInteractions：verifyZeroInteractions
ArgumentCaptor 参数捕获器
可在验证时对方法的参数进行捕获，最后验证捕获的参数值。如果方法有多个参数都要捕获验证，那就需要创建多个ArgumentCaptor对象处理。

6、下载地址：

https://git.oschina.net/paincupid/springmvc.git

7、转载请注明出处：

http://blog.csdn.net/paincupid/article/details/53561435