Java TestNG 和 Spring 3

TestNG and Spring 3

提问by niklassaers

What is the best practice way to do unit testing with Spring? I assume the combination TestNG & jmockit with Spring 3 isn't bad, so that's what I'm doing right now, but if I'm off course selecting the tools for my fresh Spring project, please tell me right away. :-)

使用 Spring 进行单元测试的最佳实践方法是什么？我认为 TestNG 和 jmockit 与 Spring 3 的组合还不错，所以这就是我现在正在做的事情，但是如果我没有为我的新 Spring 项目选择工具，请立即告诉我。:-)

Anyways, I've created an entity that I want to test, but I'm not sure how to actually run the TestNG from the Spring context. I've created a simple test class

无论如何，我已经创建了一个要测试的实体，但我不确定如何从 Spring 上下文实际运行 TestNG。我创建了一个简单的测试类

package com.mydomain.data.entities.test;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.ApplicationContext;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.testng.AbstractTestNGSpringContextTests;
import org.testng.Assert;
import org.testng.annotations.*;

@ContextConfiguration(locations={"classpath:applicationContext.xml"}) 
public class SimpleTest extends AbstractTestNGSpringContextTests {

    @Autowired
    private ApplicationContext applicationContext;

    @BeforeClass
    protected void setUp() throws Exception {
        Assert.assertNotNull(applicationContext);
    }

    @Test
    public void testNothing() {

    }

}

with applicationContext.xml importing beans for setting up the model and business layer. First off all, I'd like it to use the applicationContext.xml from Project/WebRoot/WEB-INF, whereas the source for this test lives in Project/src/com/mydomain/data/entities/test, but I believe that /applicationContext.xml would give me Projects/src, same as classpath: Is this correct?

使用 applicationContext.xml 导入 bean 以设置模型和业务层。首先，我希望它使用 Project/WebRoot/WEB-INF 中的 applicationContext.xml，而此测试的源代码位于 Project/src/com/mydomain/data/entities/test，但我相信/applicationContext.xml 会给我 Projects/src，与 classpath 相同：这是正确的吗？

Furthermore, now that I'm using the model and business layers that my web application would use, I should expect it to behave similarly. But, when I launch TestNG on the test, it sais: class org.hibernate.cfg.ExtendedMappings has interface org.hibernate.cfg.Mappings as super class:

此外，既然我正在使用我的 Web 应用程序将使用的模型和业务层，我应该期望它的行为类似。但是，当我在测试中启动 TestNG 时，它说： class org.hibernate.cfg.ExtendedMappings 将接口 org.hibernate.cfg.Mappings 作为超类：

Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sessionFactory' defined in URL [file:/Users/niklas/Documents/Eclipse/Project/WebRoot/WEB-INF/Project-Model.xml]: Invocation of init method failed; nested exception is java.lang.IncompatibleClassChangeError: class org.hibernate.cfg.ExtendedMappings has interface org.hibernate.cfg.Mappings as super class
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1393)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:511)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:449)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getObject(AbstractBeanFactory.java:289)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:286)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:192)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeansOfType(DefaultListableBeanFactory.java:352)
    at org.springframework.beans.factory.BeanFactoryUtils.beansOfTypeIncludingAncestors(BeanFactoryUtils.java:266)
    at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.detectPersistenceExceptionTranslators(PersistenceExceptionTranslationInterceptor.java:121)
    at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.<init>(PersistenceExceptionTranslationInterceptor.java:77)
    at org.springframework.dao.annotation.PersistenceExceptionTranslationAdvisor.<init>(PersistenceExceptionTranslationAdvisor.java:70)
    at org.springframework.dao.annotation.PersistenceExceptionTranslationPostProcessor.setBeanFactory(PersistenceExceptionTranslationPostProcessor.java:99)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeAwareMethods(AbstractAutowireCapableBeanFactory.java:1414)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1381)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:511)
    ... 38 more
Caused by: java.lang.IncompatibleClassChangeError: class org.hibernate.cfg.ExtendedMappings has interface org.hibernate.cfg.Mappings as super class
    at java.lang.ClassLoader.defineClass1(Native Method)
    at java.lang.ClassLoader.defineClass(ClassLoader.java:700)
    at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:124)
    at java.net.URLClassLoader.defineClass(URLClassLoader.java:260)
    at java.net.URLClassLoader.access
  <bean id="sessionFactory" class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean">
    <property name="dataSource" ref="dataSource"/>
    <property name="annotatedClasses">
      <list>
       <!-- Entity classes from package com.mydomain.data.entities -->
      </list>
    </property>
    <property name="hibernateProperties">
      <props>
        <prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop>
        <prop key="hibernate.show_sql">false</prop>
      </props>
    </property>
  </bean>
0(URLClassLoader.java:56)
    at java.net.URLClassLoader.run(URLClassLoader.java:195)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:319)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:330)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:254)
    at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:399)
    at org.hibernate.cfg.AnnotationConfiguration.createExtendedMappings(AnnotationConfiguration.java:187)
    at org.hibernate.cfg.AnnotationConfiguration.secondPassCompile(AnnotationConfiguration.java:277)
    at org.hibernate.cfg.Configuration.buildMappings(Configuration.java:1162)
    at org.springframework.orm.hibernate3.LocalSessionFactoryBean.buildSessionFactory(LocalSessionFactoryBean.java:667)
    at org.springframework.orm.hibernate3.AbstractSessionFactoryBean.afterPropertiesSet(AbstractSessionFactoryBean.java:211)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1452)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1390)
    ... 53 more

What is this and why am I getting this? Any clues?

这是什么，为什么我会得到这个？有什么线索吗？

My sessionFactory looks like this

我的 sessionFactory 看起来像这样

 java.lang.IncompatibleClassChangeError: class org.hibernate.cfg.ExtendedMappings has interface org.hibernate.cfg.Mappings as super class

采纳答案by Grzegorz Oledzki

Now the problem doesn't seem to be related to any of Spring or TestNG. The key part is:

现在问题似乎与任何 Spring 或 TestNG 无关。关键部分是：

Class.forName("org.hibernate.cfg.ExtendedMappings");

Are you sure your CLASSPATH is OK? I.e. you have compatible version of Hibernate modules and no repetitions there?

你确定你的 CLASSPATH 没问题吗？即您有兼容版本的 Hibernate 模块并且那里没有重复？

What if you create a simple TestNG test that does the following:

如果您创建一个执行以下操作的简单 TestNG 测试会怎样：

##代码##

?

?

回答by Grzegorz Oledzki

Consult the chapter on TestNG in the Spring documentation:

请参阅 Spring 文档中有关 TestNG 的章节：

• for Spring 2.5.
• for Spring 3.0

• 对于Spring 2.5中。
• 对于春3.0

回答by mR_fr0g

Your test ckass needs to extend AbstractTestNGSpringContextTests. Or if your code is testing database acces another useful class to extend is AbstractTransactionalTestNGSpringContextTests.

您的测试 ckass 需要扩展AbstractTestNGSpringContextTests。或者，如果您的代码正在测试数据库访问另一个有用的扩展类是AbstractTransactionalTestNGSpringContextTests。

回答by Kango_V

You might want to try hibernate-annotations-3.5.0-Beta-1 as this aligns with hibernate-core-3.5.0-Beta-1.

您可能想尝试 hibernate-annotations-3.5.0-Beta-1，因为它与 hibernate-core-3.5.0-Beta-1 一致。

I still get the java.lang.IncompatibleClassChangeError sometimes, as I'm trying to use hibernate search which is using the "old" annotations.

有时我仍然会遇到 java.lang.IncompatibleClassChangeError，因为我正在尝试使用使用“旧”注释的休眠搜索。

Also, not sure if you are running JBoss, but if you are you'll get this error with core 3.5.0.

另外，不确定您是否正在运行 JBoss，但如果是，您将在核心 3.5.0 中收到此错误。

回答by ripper234

For me this problem was caused because I had different hibernate versions included myself, not because of a third party including them. A sweep of your project/poms to make sure you youserlf are only using one hibernate version is worthwhile.

对我来说，这个问题是因为我自己包含了不同的休眠版本，而不是因为包含它们的第三方。扫描您的项目/poms 以确保您自己只使用一个休眠版本是值得的。