谈一谈JUnit神奇的报错 java.lang.Exception:No tests found matching
最近在学习Spring+SpringMVC+MyBatis,一个人的挖掘过程确实有点艰难,尤其是有一些神奇的报错让你会很蛋疼。特别是接触一些框架还是最新版本的时候,会因为版本问题出现很多错误,欢迎大家一起学习交流
这篇就说一下困扰我昨晚2小时的一个报错,nitializationError(org.junit.runner.manipulation.Filter)或者No tests found matching异常,查阅了很多资料,总结一下这些情况和解决办法。
1.最容易发现的错误,就如报错所说,没有找到test方法就是因为忘记在方法前加 @Test 注解了。
应该是这样:
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public class TestCase {
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public void checkSomething() {
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//...
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}
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}
2.使用Maven构建项目时候,pom文件中的JUnit版本和classpath中的版本不一致,删掉一个就好(这种应该没什么人吧。。。)。
3.你可以尝试重启Eclipse或者重建或者刷新项目,重新清理,关闭重新打开项目……有时候是Eclipse的问题。
4.如果是测试方法命名不规范的问题,你可以尝试把方法统一改为 testXXX(),这是JUnit3风格。
5.测试类所在文件夹必须为源文件夹source files,如果不是,选择 'Build path' -> 'Use as a source folder'。
6.看你的测试类是否继承TestCase,如果是,删除继承,并不需要继承,例如:
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public class MyTestCase extends TestCase{
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public void checkSomething() {
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//...
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}
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}
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//Result> AssertionFailedError: No test Found in MyTestCase
应该是下面的TestCase
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public class MyTestCase {
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public void checkSomething() {
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//...
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}
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}
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//Works fine
8.如果你的Eclipse版本太旧,也会导致,更新版本。
9.最后一个就是我的这个问题:版本不兼容,需要更换JUnit或者spring版本
报错信息具体如下,会有两种
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java.lang.Exception: No tests found matching [{ExactMatcher:fDisplayName=testQueryById], {ExactMatcher:fDisplayName=testQueryById(org.seckill.dao.SeckillDaoTest)], {LeadingIdentifierMatcher:fClassName=org.seckill.dao.SeckillDaoTest,fLeadingIdentifier=testQueryById]] from org.junit.internal.requests.ClassRequest@1698c449
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at org.junit.internal.requests.FilterRequest.getRunner(FilterRequest.java:35)
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at org.eclipse.jdt.internal.junit4.runner.JUnit4TestLoader.createFilteredTest(JUnit4TestLoader.java:77)
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at org.eclipse.jdt.internal.junit4.runner.JUnit4TestLoader.createTest(JUnit4TestLoader.java:68)
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at org.eclipse.jdt.internal.junit4.runner.JUnit4TestLoader.loadTests(JUnit4TestLoader.java:43)
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at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:444)
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at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:675)
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at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)
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at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)
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或者:
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java.lang.ExceptionInInitializerError
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at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
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at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
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at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
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at java.lang.reflect.Constructor.newInstance(Constructor.java:408)
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at org.junit.internal.builders.AnnotatedBuilder.buildRunner(AnnotatedBuilder.java:29)
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at org.junit.internal.builders.AnnotatedBuilder.runnerForClass(AnnotatedBuilder.java:21)
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at org.junit.runners.model.RunnerBuilder.safeRunnerForClass(RunnerBuilder.java:59)
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at org.junit.internal.builders.AllDefaultPossibilitiesBuilder.runnerForClass(AllDefaultPossibilitiesBuilder.java:26)
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at org.junit.runners.model.RunnerBuilder.safeRunnerForClass(RunnerBuilder.java:59)
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at org.junit.internal.requests.ClassRequest.getRunner(ClassRequest.java:26)
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at org.eclipse.jdt.internal.junit4.runner.JUnit4TestLoader.createUnfilteredTest(JUnit4TestLoader.java:84)
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at org.eclipse.jdt.internal.junit4.runner.JUnit4TestLoader.createTest(JUnit4TestLoader.java:70)
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at org.eclipse.jdt.internal.junit4.runner.JUnit4TestLoader.loadTests(JUnit4TestLoader.java:43)
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at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:444)
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at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:675)
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at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)
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at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)
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Caused by: java.lang.IllegalStateException: SpringJUnit4ClassRunner requires JUnit 4.12 or higher.
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at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.<clinit>(SpringJUnit4ClassRunner.java:102)
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... 17 more
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package org.seckill.dao;
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import javax.annotation.Resource;
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import org.junit.Test;
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import org.junit.runner.RunWith;
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import org.seckill.entity.Seckill;
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import org.springframework.test.context.ContextConfiguration;
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import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
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/**
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* project:seckill
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* @author Daley 下午10:20:28 2016年12月20日 2016
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* 配置Spring和JUnit整合 ,JUnit启动时加载SpringIOC容器
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*/
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//告诉JUnitSpring配置文件
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public class SeckillDaoTest {
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//注入Dao实现类依赖
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private SeckillDao seckillDao;
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public void testQueryById() {
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long id=1000;
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Seckill seckill=seckillDao.queryById(id);
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System.out.println(seckill.getName());
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System.out.println(seckill);
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}
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}
由于试过了很多方法,这时我有了一个最不愿意的怀疑,难道是版本不兼容问题?
于是我把 @RunWith注解删掉,发现这时报的是空指针错误,说明没有加载spring容器,我使用的SpringFramework版本是 4.3.4.RELEASE ,这个是最终版本应该是比较稳定和兼容性好呀,那么问题可能就是JUnit不兼容了,我使用的是JUnit4.10
当我换成4.11时候,还是报错,但是换到最新的4.12版本的时候,这个报错消失了!出现了这个可爱的颜色。
嗯……绿色一定是我的最爱
顺便贴出配置信息:
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< dependency>
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<groupId>junit</groupId>
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<artifactId>junit</artifactId>
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<version>4.12</version>
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</dependency>
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<dependency>
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<groupId>org.springframework</groupId>
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<artifactId>spring-core</artifactId>
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<version>4.3.4.RELEASE</version>
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</dependency>
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<!-- https://mvnrepository.com/artifact/org.springframework/spring-context -->
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<dependency>
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<groupId>org.springframework</groupId>
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<artifactId>spring-context</artifactId>
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<version>4.3.4.RELEASE</version>
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</dependency>
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<!-- https://mvnrepository.com/artifact/org.springframework/spring-beans -->
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<dependency>
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<groupId>org.springframework</groupId>
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<artifactId>spring-beans</artifactId>
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<version>4.3.4.RELEASE</version>
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</dependency>
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<!-- https://mvnrepository.com/artifact/org.springframework/spring-jdbc -->
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<dependency>
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<groupId>org.springframework</groupId>
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<artifactId>spring-jdbc</artifactId>
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<version>4.3.4.RELEASE</version>
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</dependency>
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<!-- https://mvnrepository.com/artifact/org.springframework/spring-tx -->
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<dependency>
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<groupId>org.springframework</groupId>
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<artifactId>spring-tx</artifactId>
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<version>4.3.4.RELEASE</version>
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</dependency>
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<!-- https://mvnrepository.com/artifact/org.springframework/spring-web -->
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<dependency>
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<groupId>org.springframework</groupId>
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<artifactId>spring-web</artifactId>
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<version>4.3.4.RELEASE</version>
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</dependency>
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<!-- https://mvnrepository.com/artifact/org.springframework/spring-webmvc -->
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<dependency>
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<groupId>org.springframework</groupId>
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<artifactId>spring-webmvc</artifactId>
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<version>4.3.4.RELEASE</version>
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</dependency>
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<!-- https://mvnrepository.com/artifact/org.springframework/spring-test -->
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<dependency>
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<groupId>org.springframework</groupId>
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<artifactId>spring-test</artifactId>
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<version>4.3.4.RELEASE</version>
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</dependency>
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