Why is my test not running

Question

Strangest thing happened my test was running ok and now its not anymore I didn't change the code at all here is the exception :

Class not found com.example.test
java.lang.ClassNotFoundException: com.example.test
    at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.loadClass(RemoteTestRunner.java:693)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.loadClasses(RemoteTestRunner.java:429)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:452)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)

Answer 1

JVM is not able to find the class test. is the class name correct. I mean is it not com.example.Test?

Answer 2

Check run config of the JUnit test. In the classpath tab, resotre default entries once in case that is not the case already. In project properties check if both junit package and classes source folder is in the source package and there is an actual class compilation existring for the class under test in your expected target folder.

Answer 3

I see that you are using Eclipse, but are you also using some other external build/test tool like Ant or Maven? Sometimes Eclipse can get out of sync when also using other external tools.

If you are using external tools, do whatever is necessary to clean up generated artifacts (e.g. mvn clean). Then refresh the Eclipse project and do a clean build as suggested previously. Then try running your unit test again using Eclipse.

Good luck and hope this helps.