Eclipse没有找到由NoClassDefFoundError使用LauncherFactory引起的使用JUnit 5的测试

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问题描述

每当我运行项目JUnit测试(将JUnit 5与Java 9和Eclipse Oxygen 1.a结合使用)时，都会遇到Eclipse无法找到任何测试的问题.

Whenever I run my projects JUnit test (using JUnit 5 with Java 9 and Eclipse Oxygen 1.a) I encounter the problem that eclipse can't find any tests.

在运行配置下，eclipse甚至找不到用@Test注释的方法，而是只显示"(所有方法)".下图希望可以更好地了解我的设置:

Under the run configuration, eclipse can't even find the method which is annotated with @Test, but instead only shows me "(all methods)".The following picture hopefully gives a better glimps of my setup:

java.lang.NoClassDefFoundError: org/junit/platform/launcher/core/LauncherFactory
    at org.eclipse.jdt.internal.junit5.runner.JUnit5TestLoader.<init>(JUnit5TestLoader.java:31)
    at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
    at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
    at java.base/java.lang.reflect.Constructor.newInstance(Unknown Source)
    at java.base/java.lang.Class.newInstance(Unknown Source)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.createRawTestLoader(RemoteTestRunner.java:368)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.createLoader(RemoteTestRunner.java:363)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.defaultInit(RemoteTestRunner.java:307)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.init(RemoteTestRunner.java:222)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:206)
Caused by: java.lang.ClassNotFoundException: org.junit.platform.launcher.core.LauncherFactory
    at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(Unknown Source)
    at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(Unknown Source)
    at java.base/java.lang.ClassLoader.loadClass(Unknown Source)
    ... 11 more

到目前为止我尝试过的事情

我已经尝试过

What I tried so far

I've already tried

要从构建路径中删除测试文件夹，然后再次添加.
通过将鼠标悬停在@Test注释的方法上来开始测试，然后单击以JUnit Test身份运行".
从Buildpath中删除JUnit并再次添加
重启日食
我还将整个项目从一台机器移到另一台机器上，并在那里使用提供的eclipse安装对其进行了尝试
重命名测试方法.
重新输入@Test批注

其中一些步骤可以在此处找到，但最后问题仍然存在.

Some of these steps can be found here, but in the end the problem remained.