This error
NoClassDefFoundError: org/testng/TestNG
appears when I'm trying to run my test from Testng.xml file using IntelliJ IDEA.Running my test one by one works perfectly as well as running whole gradle project which points to testng.xml, like grade core-test:test
( On my project I'm using Appium + IntelliJ + TestNG )
But when I'm running testng.xml using IntelliJ I'm immediately getting this message after pressing Run:
Exception in thread "main" java.lang.NoClassDefFoundError: org/testng/TestNGat java.lang.ClassLoader.defineClass1(Native Method)at java.lang.ClassLoader.defineClass(ClassLoader.java:763)at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)at java.net.URLClassLoader.defineClass(URLClassLoader.java:467)at java.net.URLClassLoader.access$100(URLClassLoader.java:73)at java.net.URLClassLoader$1.run(URLClassLoader.java:368)at java.net.URLClassLoader$1.run(URLClassLoader.java:362)at java.security.AccessController.doPrivileged(Native Method)at java.net.URLClassLoader.findClass(URLClassLoader.java:361)at java.lang.ClassLoader.loadClass(ClassLoader.java:424)at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)at java.lang.ClassLoader.loadClass(ClassLoader.java:357)at org.testng.RemoteTestNGStarter.main(RemoteTestNGStarter.java:120)at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)at java.lang.reflect.Method.invoke(Method.java:498)at com.intellij.rt.execution.application.AppMain.main(AppMain.java:147)Caused by: java.lang.ClassNotFoundException: org.testng.TestNGat java.net.URLClassLoader.findClass(URLClassLoader.java:381)at java.lang.ClassLoader.loadClass(ClassLoader.java:424)at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)at java.lang.ClassLoader.loadClass(ClassLoader.java:357)... 18 more