(轉載)談一談JUnit神奇的報錯 java.lang.Exception:No tests found matching
原文地址:https://blog.csdn.net/sinat_32873711/article/details/53780453
談一談JUnit神奇的報錯 java.lang.Exception:No tests found matching
這篇就說一下困擾我昨晚2小時的一個報錯,nitializationError(org.junit.runner.manipulation.Filter)或者No tests found matching異常,查閱了很多資料,總結一下這些情況和解決辦法。
1.最容易發現的錯誤,就如報錯所說,沒有找到test方法就是因為忘記在方法前加 @Test 註解了。
應該是這樣:
public class TestCase {
@Test
public void checkSomething() {
//...
}
}
2.使用Maven構建專案時候,pom檔案中的JUnit版本和classpath中的版本不一致,刪掉一個就好(這種應該沒什麼人吧。。。)。
3.你可以嘗試重啟Eclipse或者重建或者重新整理專案,重新清理,關閉重新開啟專案……有時候是Eclipse的問題。
4.如果是測試方法命名不規範的問題,你可以嘗試把方法統一改為 testXXX(),這是JUnit3風格。
5.測試類所在資料夾必須為原始檔夾source files,如果不是,選擇 'Build path' -> 'Use as a source folder'。
6.看你的測試類是否繼承TestCase,如果是,刪除繼承,並不需要繼承,例如:
public class MyTestCase extends TestCase{
@Test
public void checkSomething() {
//...
}
}
//Result> AssertionFailedError: No test Found in MyTestCase
應該是下面的TestCase
public class MyTestCase { @Test public void checkSomething() { //... } } //Works fine
7.有些小夥伴右鍵選擇特定的測試方法會報錯,但是執行整個測試類卻不會,不信可以試試
8.如果你的Eclipse版本太舊,也會導致,更新版本。
9.最後一個就是我的這個問題:版本不相容,需要更換JUnit或者spring版本
報錯資訊具體如下,會有兩種
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 [email protected]
at org.junit.internal.requests.FilterRequest.getRunner(FilterRequest.java:35)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestLoader.createFilteredTest(JUnit4TestLoader.java:77)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestLoader.createTest(JUnit4TestLoader.java:68)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestLoader.loadTests(JUnit4TestLoader.java:43)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:444)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:675)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)
或者:
java.lang.ExceptionInInitializerError
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:408)
at org.junit.internal.builders.AnnotatedBuilder.buildRunner(AnnotatedBuilder.java:29)
at org.junit.internal.builders.AnnotatedBuilder.runnerForClass(AnnotatedBuilder.java:21)
at org.junit.runners.model.RunnerBuilder.safeRunnerForClass(RunnerBuilder.java:59)
at org.junit.internal.builders.AllDefaultPossibilitiesBuilder.runnerForClass(AllDefaultPossibilitiesBuilder.java:26)
at org.junit.runners.model.RunnerBuilder.safeRunnerForClass(RunnerBuilder.java:59)
at org.junit.internal.requests.ClassRequest.getRunner(ClassRequest.java:26)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestLoader.createUnfilteredTest(JUnit4TestLoader.java:84)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestLoader.createTest(JUnit4TestLoader.java:70)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestLoader.loadTests(JUnit4TestLoader.java:43)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:444)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:675)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)
Caused by: java.lang.IllegalStateException: SpringJUnit4ClassRunner requires JUnit 4.12 or higher.
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.<clinit>(SpringJUnit4ClassRunner.java:102)
... 17 more
No tests found matching和ExceptionInInitializerError這兩個錯誤其實都是一個,都是初始化錯誤,測試用例沒有成功。
package org.seckill.dao;
import javax.annotation.Resource;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.seckill.entity.Seckill;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
/**
* project:seckill
* @author Daley 下午10:20:28 2016年12月20日 2016
* 配置Spring和JUnit整合 ,JUnit啟動時載入SpringIOC容器
*/
@RunWith(SpringJUnit4ClassRunner.class)
//告訴JUnitSpring配置檔案
@ContextConfiguration({"classpath:spring/spring-dao.xml"})
public class SeckillDaoTest {
//注入Dao實現類依賴
@Resource
private SeckillDao seckillDao;
@Test
public void testQueryById() {
long id=1000;
Seckill seckill=seckillDao.queryById(id);
System.out.println(seckill.getName());
System.out.println(seckill);
}
}
由於試過了很多方法,這時我有了一個最不願意的懷疑,難道是版本不相容問題?
於是我把 @RunWith註解刪掉,發現這時報的是空指標錯誤,說明沒有載入spring容器,我使用的SpringFramework版本是 4.3.4.RELEASE ,這個是最終版本應該是比較穩定和相容性好呀,那麼問題可能就是JUnit不相容了,我使用的是JUnit4.10
當我換成4.11時候,還是報錯,但是換到最新的4.12版本的時候,這個報錯消失了!出現了這個可愛的顏色。
嗯……綠色一定是我的最愛
順便貼出配置資訊:
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>4.3.4.RELEASE</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework/spring-context -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>4.3.4.RELEASE</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework/spring-beans -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-beans</artifactId>
<version>4.3.4.RELEASE</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework/spring-jdbc -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>4.3.4.RELEASE</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework/spring-tx -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-tx</artifactId>
<version>4.3.4.RELEASE</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework/spring-web -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>4.3.4.RELEASE</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework/spring-webmvc -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>4.3.4.RELEASE</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework/spring-test -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>4.3.4.RELEASE</version>
</dependency>