概述
當對一個切面類進行測試時觉鼻，由于Spring對切面對象生成了proxy對象挪蹭，此時對切面對象使用ReflectionTestUtils賦值，操作的是proxy對象目木，而不是真實對象溃列，會使得賦值出問題劲厌。可以通過引入AopTestUtils解決賦值問題听隐。
AopTestUtils使用思路
通過AopTestUtils可以通過切面proxy對象补鼻，獲取到切面的真實對象。通過使用ReflectionTestUtils對真實的切面對象修改依賴，到達mock的目的风范。
代碼例子
準備切面對象：
IBar：
package com.github.yongzhizhan.draftbox.springtest.aop;
public interface IBar {
String perform(String message);
}
Bar:
package com.github.yongzhizhan.draftbox.springtest.aop;
import org.springframework.beans.factory.annotation.Autowired;
public class Bar implements IBar {
@Autowired
Dep dep;
@Override
public String perform(final String message) {
System.out.println("run bar " + message);
return dep.perform("aspect");
}
}
依賴對象：
package com.github.yongzhizhan.draftbox.springtest.aop;
/**
* Dependence class
* @author zhanyongzhi
*/
public class Dep {
public String perform(String msg){
return msg;
}
}
切面：
package com.github.yongzhizhan.draftbox.springtest.aop;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
/**
* 切面
*/
@Aspect
public class BarAspect {
@Before(value = "execution(* com.github.yongzhizhan.draftbox.springtest.aop.Bar.perform(..))")
public void beforeSayHello(JoinPoint vJoinPoint){
System.out.println("aspect before "+vJoinPoint.getArgs()[0]);
}
}
測試例子
package com.github.yongzhizhan.draftbox.springtest;
import com.github.yongzhizhan.draftbox.springtest.aop.Bar;
import com.github.yongzhizhan.draftbox.springtest.aop.BarAspect;
import com.github.yongzhizhan.draftbox.springtest.aop.Dep;
import com.github.yongzhizhan.draftbox.springtest.aop.IBar;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.mockito.InjectMocks;
import org.mockito.Mock;
import org.mockito.MockitoAnnotations;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.ApplicationContext;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
import org.springframework.test.util.AopTestUtils;
import org.springframework.test.util.ReflectionTestUtils;
import static org.mockito.Mockito.when;
/**
* 通過AopTestUtils解決ReflectionTestUtils賦值切面對象的問題
* @author zhanyongzhi
*/
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("classpath*:**web-config.xml")
public class AopTestUtilsTest {
@Mock
Dep dep;
@Autowired
private BarAspect barAspect;
@Autowired
ApplicationContext applicationContext;
@Autowired
@InjectMocks
IBar bar;
@Before
public void setUp(){
MockitoAnnotations.initMocks(this);
//對象默認返回aspect,修改為返回mock
when(dep.perform("aspect")).thenReturn("mock");
}
@Test
public void testDefault(){
String tRet = bar.perform("hello");
//mock注入無效,仍然返回aspect
if(!"aspect".equals(tRet))
Assert.fail("perform return not equeal aspect");
}
@Test
public void testAopUtils(){
//獲取真實的代理對象
Bar tBar = AopTestUtils.getTargetObject(bar);
ReflectionTestUtils.setField(tBar, "dep", dep);
String tRet = bar.perform("hello");
//此時才真正mock到
if(!"mock".equals(tRet))
Assert.fail("perform return not equeal mock");
}
}
配置文件：
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:aop="http://www.springframework.org/schema/aop"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-4.1.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-4.1.xsd">
<!-- scan the package and the sub package -->
<mvc:annotation-driven/>
<context:component-scan base-package="com.github.yongzhizhan.draftbox.springtest"/>
<bean id="bar" class="com.github.yongzhizhan.draftbox.springtest.aop.Bar"/>
<bean id="dep" class="com.github.yongzhizhan.draftbox.springtest.aop.Dep"/>
<bean id="barAspect" class="com.github.yongzhizhan.draftbox.springtest.aop.BarAspect"/>
<aop:aspectj-autoproxy/>
</beans>
參考
spring-aop-aspect-not-working-using-mockito
mockito-and-spring-proxies
is-it-possible-to-unproxy-a-spring-bean
