如何使用JUnit在Spring中获取数据库连接？
我试图使用服务和方法的正确逻辑来测试从DB给出的正确信息。 在这个简单的例子中，我只使用assertEquals语句来比较roleService的id，但我仍然收到错误。 我有以下代码：
[更新]
测试方法：
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(value = { "classpath:applicationContext.xml" })
@Transactional
@WebAppConfiguration
@ComponentScan(basePackages ={ "com.project.surveyengine" },
excludeFilters = {@ComponentScan.Filter(type = FilterType.ANNOTATION, value = Configuration.class) ,
@ComponentScan.Filter(type = FilterType.ANNOTATION, value = WebConfig.class)})
public class RoleServiceTest {
@Configuration
static class ContextConfiguration {
@Bean
public RoleService roleService() {
RoleService roleService = new RoleService();
// set properties, etc.
return roleService;
}
}
private final LocalServiceTestHelper helper =
new LocalServiceTestHelper(new LocalDatastoreServiceTestConfig()
.setDefaultHighRepJobPolicyUnappliedJobPercentage(100));
private Closeable closeable;
@Before
public void setUp() {
helper.setUp();
ObjectifyService.register(Role.class);
closeable = ObjectifyService.begin();
}
@After
public void tearDown() {
closeable.close();
helper.tearDown();
}
@Autowired
private RoleService roleService;
@Test
public void existsRole() throws Exception{
Role role = roleService.getByName("ROLE_ADMIN");
assertEquals("Correct test", Long.valueOf("5067160539889664"), role.getId());
}
}
RoleService是使用Google App Engine objectifyService查阅数据库信息的服务类。
applicationContext.xml中
<?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"
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.xsd">
<context:annotation-config />
<context:component-scan base-package="com.project.surveyengine.config"/>
<!--Controllers-->
<bean id="inboxController" class="com.project.surveyengine.controller.InboxController" autowire="byType"></bean>
<bean id="mailController" class="com.project.surveyengine.controller.MailController" autowire="byType"></bean>
<bean id="loginController" class="com.project.surveyengine.controller.LoginController" autowire="byType"></bean>
<bean id="initController" class="com.project.surveyengine.controller.InitController" autowire="byType"></bean>
<!--Services-->
<bean id="answerService" class="com.project.surveyengine.service.impl.AnswerService" autowire="byType"></bean>
<bean id="blobService" class="com.project.surveyengine.service.impl.BlobService" autowire="byType"></bean>
<bean id="mailService" class="com.project.surveyengine.service.impl.MailService" autowire="byType"></bean>
<bean id="caseService" class="com.project.surveyengine.service.impl.CaseService" autowire="byType"></bean>
<bean id="roleService" class="com.project.surveyengine.service.impl.RoleService" autowire="byType"></bean>
</beans>
进入com.project.surveyengine.config我有以下三个类：
1）
public class MyXmlWebApplicationContext extends XmlWebApplicationContext {
protected void initBeanDefinitionReader(XmlBeanDefinitionReader beanDefinitionReader) {
super.initBeanDefinitionReader(beanDefinitionReader);
if (SystemProperty.environment.value() == SystemProperty.Environment.Value.Production) {
beanDefinitionReader.setValidating(false);
beanDefinitionReader.setNamespaceAware(true);
}
}
}
2）
@Configuration
@EnableWebMvc
public class WebConfig extends WebMvcConfigurerAdapter{
@Bean
UrlBasedViewResolver resolver(){
UrlBasedViewResolver resolver = new UrlBasedViewResolver();
resolver.setPrefix("/views/");
resolver.setSuffix(".jsp");
resolver.setViewClass(JstlView.class);
return resolver;
}
@Override
public void addResourceHandlers(ResourceHandlerRegistry registry) {
registry.addResourceHandler("/statics/**").addResourceLocations("/statics/");
}
}
3）
@Configuration
@EnableWebSecurity
@EnableGlobalMethodSecurity(prePostEnabled = true)
public class SecurityContext extends WebSecurityConfigurerAdapter {
@Override
public void configure(WebSecurity web) throws Exception {
web.ignoring().antMatchers("/statics/**");
}
@Override
protected void configure(HttpSecurity http) throws Exception {
http
.formLogin()
//...more code
}
}
我收到这个错误：
2016年12月20日4:40:03 PM com.google.appengine.api.datastore.dev.LocalDatastoreService初始化INFO：本地数据存储已初始化：类型：高复制存储：内存
java.lang.NullPointerException在com.project.surveyengine.service.impl.RoleServiceTest.existsRole（RoleServiceTest.java:111）
RoleServiceTest.java:111 = assertEquals("Correct test", Long.valueOf("5067160539889664"), role.getId());
您是否尝试按文档http://docs.spring.io/spring/docs/current/javadoc-api/org/springframework/test/context/web/WebAppConfiguration.html中的建议添加@WebAppConfiguration ？
我会用这种方式来验证你的测试代码
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(value = { "classpath:applicationContext.xml" })
@TransactionConfiguration(transactionManager="txMgr", defaultRollback=false)
@Transactional
@WebAppConfiguration
@ComponentScan(basePackages ={ "com.project.surveyengine" }, excludeFilters = {
@ComponentScan.Filter(type = FilterType.ANNOTATION, value = Configuration.class) })
public class RoleServiceTest {
@Autowired
private RoleService roleService;
@Test
public void existsRole() throws Exception{
Role role = roleService.getByName("ROLE_ADMIN");
assertEquals("Correct test", Long.valueOf("5067160539889664"), role.getId());
}
}
正如你所看到的，我也添加了注释@WebAppConfiguration
我希望这可以帮助你
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