unit测试出现异常:Exception in thread "main" java.lang.NoSuchMethodError: org.junit.platform.commons.util
在进行单元测试时,测试出现异常
Exception in thread "main" java.lang.NoSuchMethodError: org.junit.platform.commons.util.ReflectionUtils.getDefaultClassLoader()Ljava/lang/ClassLoader;
at org.junit.platform.launcher.core.ServiceLoaderTestEngineRegistry.loadTestEngines(ServiceLoaderTestEngineRegistry.java:30)
at org.junit.platform.launcher.core.LauncherFactory.create(LauncherFactory.java:53)
at com.intellij.junit5.JUnit5IdeaTestRunner.createListeners(JUnit5IdeaTestRunner.java:39)
at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:49)
at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)
https://junit.org/junit5/docs/current/user-guide/#running-tests-ide-intellij-idea
pom.xml
依赖如下
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
</dependency>
<dependency>
<groupId>org.junit.jupiter</groupId>
<artifactId>junit-jupiter-api</artifactId>
<version>RELEASE</version>
</dependency>
</dependencies>
问题原因
错误就在pom.xml
的依赖中,仔细查看控制台输出你会发现IntelliJ IDEA正在尝试使用JUnit5运行我的测试用例。
at com.intellij.junit5.JUnit5IdeaTestRunner.createListeners(JUnit5IdeaTestRunner.java:39)
通过pom.xml
发现,我希望使用JUnit4.12运行测试用例,我们查看pom.xml
发现junit-jupiter-api这个依赖会导致这个错误。
<dependency>
<groupId>org.junit.jupiter</groupId>
<artifactId>junit-jupiter-api</artifactId>
<version>RELEASE</version>
</dependency>
因为此模块专为JUnit5而设计 -https://mvnrepository.com/artifact/org.junit.jupiter/junit-jupiter-api
解决方案
1、删除
pom.xml
中org.junit.jupiter
依赖
2、Reimport All Maven Project