将基于Spring的UnitTest集成到Maven中

在进行persistence layer的开发时，我们总是要写写UnitTest来验证我们提供给上一层的API是经过验证了的。通常我们需要单独的为UnitTest编写一份独立的Spring
ApplicationContext配置文件，基于Maven约定大于配置的实践，我们将Spring ApplicationContext配置文件放在项目的src/test/resources下，Test
Source Code放在sr/test/java下。

Spring为我们提供一个非常方便的Annotation类@ContextConfiguration,可以使用该Annotation告诉Spring将在何处载入ApplicationContext配置文件以便运行测试代码。将此Annotation配置在UnitTest类声明上，则UnitTest类就可方便地利用Spring来编写测试用例了。

下面为一UnitTest实例：

 

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = { "classpath*:/forum-repository-test.xml" })
public class JpaUserRepositoryTest {

@Autowired
private UserRepository userRepository;

@Test
public void testGetUserByName() {
String name = "Wang lu";
User user = userRepository.getUserByName(name);

Assert.assertEquals(name, user.getUserName());
}
}

如果在运行Unitest中需要loadtimeweaver功能（比如你的ORM框架使用的是eclipselink），则在Maven的pom中需要添加如下plugin并指定argLine，将javaagent指向spring-agent.jar。

<build>

…

<plugins>

…

</plugin>

<plugin>

<artifactId>maven-surefire-plugin</artifactId>

<version>2.10</version>

<configuration>

<forkMode>once</forkMode>

<argLine>

-javaagent:{spring-agent.jar path}

</argLine>

<useSystemClassloader>true</useSystemClassloader>

</configuration>

</plugin>

</plugins>

</build>

以下为Spring ApplicationContext测试配置文件：

<?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:p="http://www.springframework.org/schema/p" xmlns:tx="http://www.springframework.org/schema/tx"

xmlns:jdbc="http://www.springframework.org/schema/jdbc" xmlns:jee="http://www.springframework.org/schema/jee"

xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd  http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd
 http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-3.0.xsd
 http://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc-3.0.xsd
 http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd">

<context:component-scan base-package="com.lulusoft.forum.infrastructure.repositories"></context:component-scan>

<bean id="frmDataSource" class="org.apache.commons.dbcp.BasicDataSource"

destroy-method="close" p:driverClassName="oracle.jdbc.driver.OracleDriver"

p:url="jdbc:oracle:thin:@//xiechangming:1521/xiech2" p:username="htl_owner"

p:password="htlowner" />

<bean id="forumEntityManagerFactory"

class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">

<property name="persistenceUnitName" value="forumPU" />

<property name="dataSource" ref="frmDataSource" />

<property name="persistenceXmlLocation" value="classpath:META-INF/persistence.xml" />

<property name="loadTimeWeaver">

<bean

class="org.springframework.instrument.classloading.InstrumentationLoadTimeWeaver" />

</property>

<property name="jpaVendorAdapter">

<bean

class="org.springframework.orm.jpa.vendor.EclipseLinkJpaVendorAdapter">

<property name="generateDdl" value="false" />

<property name="database" value="ORACLE" />

<property name="databasePlatform"

value="org.eclipse.persistence.platform.database.oracle.Oracle11Platform" />

</bean>

</property>

</bean>

</beans>