[FIXED] How to run Junit tests from command line on windows with no package?

Issue

I have a folder(which is where I am running all commands) called learning. Inside this folder, I have two files, one is called Driver.java which is a simple main class with a simple hello world method. The other file is DriverTest.java which has this code as shown below.

import static org.junit.Assert.*;
import org.junit.Test;

public class DriverTest {
    @Test
    public void test() {
        fail("Not yet implemented");
    }
}

Apart from this I have JUnit 4.13-beta jar inside the same learning folder.

Now I open command line in windows and go to learning folder location and run this command.

javac -cp junit-4.13-beta-1.jar;hamcrest-core-2.1-rc4.jar;. *.java

It didn't give me any errors, hence it has compiled both Driver and DriverTest java files.

Now I am trying to run the JUnit test using this command.

java -cp junit-4.13-beta-1.jar;hamcrest-core-2.1-rc4.jar;. org.junit.runner.JUnitCore DriverTest

But I am getting this error:

JUnit version 4.13-beta-1
Exception in thread "main" java.lang.NoClassDefFoundError: org/hamcrest/SelfDescribing
        at java.lang.ClassLoader.defineClass1(Native Method)
        at java.lang.ClassLoader.defineClass(Unknown Source)
        at java.security.SecureClassLoader.defineClass(Unknown Source)
        at java.net.URLClassLoader.defineClass(Unknown Source)
        at java.net.URLClassLoader.access$100(Unknown Source)
        at java.net.URLClassLoader$1.run(Unknown Source)
        at java.net.URLClassLoader$1.run(Unknown Source)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        at org.junit.runner.Computer.getSuite(Computer.java:28)
        at org.junit.runner.Request.classes(Request.java:77)
        at org.junit.runner.JUnitCommandLineParseResult.createRequest(JUnitCommandLineParseResult.java:116)
        at org.junit.runner.JUnitCore.runMain(JUnitCore.java:77)
        at org.junit.runner.JUnitCore.main(JUnitCore.java:36)
Caused by: java.lang.ClassNotFoundException: org.hamcrest.SelfDescribing
        at java.net.URLClassLoader.findClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        ... 17 more

Why is my HamCrest jar not found? Its right there in the same folder right?

Solution

You only added the current directory to the classpath for compilation. This needs to also be done for test invocation, ie. ;. in windows :. on linux

java -cp junit-4.13-beta-1.jar;. org.junit.runner.JUnitCore DriverTest

Answered By - Gregory Ostermayr
Answer Checked By - Gilberto Lyons (JavaFixing Admin)