解决Spring TestContext下运行JUnit4抛错（java.lang.NoClassDefFoundError）的问题

Spring版本2.5.5，JUnit 版本 4.8.1，使用了Spring TestContext 的 SpringJUnit4ClassRunner。一直使用这个版本的JUnit，在写简单的测试时不会抛错，直到今天开始尝试写规范的JUnit测试代码，抛出了如下的错误:

Plain代码

1. java.lang.NoClassDefFoundError: org/junit/Assume$AssumptionViolatedException
2. at org.springframework.test.context.junit4.SpringMethodRoadie.runTestMethod( SpringMethodRoadie.java:240)
3. at org.springframework.test.context.junit4.SpringMethodRoadie$RunBeforesThenTestThenAfters.run( SpringMethodRoadie.java:333)
4. ...

java.lang.NoClassDefFoundError: org/junit/Assume$AssumptionViolatedException      at org.springframework.test.context.junit4.SpringMethodRoadie.runTestMethod( SpringMethodRoadie.java:240)      at org.springframework.test.context.junit4.SpringMethodRoadie$RunBeforesThenTestThenAfters.run( SpringMethodRoadie.java:333)...

Java代码

1. Caused by: java.lang.ClassNotFoundException: org.junit.Assume$AssumptionViolatedException
2. at java.net.URLClassLoader$1.run( URLClassLoader.java:202 )
3. at java.security.AccessController.doPrivileged( Native Method )
4. at java.net.URLClassLoader.findClass( URLClassLoader.java:190 )
5. ... 17 more

Caused by: java.lang.ClassNotFoundException: org.junit.Assume$AssumptionViolatedException      at java.net.URLClassLoader$1.run( URLClassLoader.java:202 )      at java.security.AccessController.doPrivileged( Native Method )      at java.net.URLClassLoader.findClass( URLClassLoader.java:190 )      ... 17 more

找了下网上的资料[1,2]，这属于 Spring 与 JUnit 版本不兼容导致的。解决方法：

修改JUnit 的版本至 4.4

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[1]http://forum.springsource.org/showthread.php?60230-spring-test-breaks-in-Junit-4-5

[2]https://jira.springsource.org/browse/SPR-5145