Named TestSuite gives error in JUnit_4.1 used w/Eclipse

[Rick Shroff]

Hi All,
I created a TestSuite using the Eclipse wizard and JUnit4_4.1. Works fine with the default name "AllTests". But if change the name to something else, gives error - "java.lang.Exception: No runnable methods".
If I use JUnit_3.8.1 and Eclipse; everything works fine even if I can change the name of the TestSuite. Looks like something to do with JUnit4_4.1 version. The jar file is called junit-4.1.jar and Eclipse version is 3.2.0

Below are the error traces and the code used. Please advise-

Test

package org.jtdemo;
 
import junit.framework.TestCase;
import org.junit.Test;
 
public class ReverseStringTest extends TestCase{
  @Test
  public  void testReverseIt() {
String str = "apple is red";
    String revStr = ReverseString.reverseIt(str);
    String revStrExpctd = "der si elppa";
    System.out.println(revStr);
    assertEquals("reverse String fails",revStrExpctd,revStr);
     }
}

TestSuite

package org.jtdemo;
 
import junit.framework.Test;
import junit.framework.TestSuite;
 
public class MyTestSuite {
 
public static Test suite() {
TestSuite suite = new TestSuite();
suite.addTestSuite(ReverseStringTest.class);
return suite;
}
 
}

Error Message and Trace

 <terminated>org.eclipse.jdt.internal.junit.runner.RemoteTestRunner at localhost:3884

java.lang.Exception: No runnable methods
at org.junit.internal.runners.TestClassMethodsRunner.testAborted(TestClassMethodsRunner.java:42)
at org.junit.internal.runners.TestClassMethodsRunner.run(TestClassMethodsRunner.java:33)
at org.junit.internal.runners.TestClassRunner$1.runUnprotected(TestClassRunner.java:42)
at org.junit.internal.runners.BeforeAndAfterRunner.runProtected(BeforeAndAfterRunner.java:34)
at org.junit.internal.runners.TestClassRunner.run(TestClassRunner.java:52)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:38)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:460)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:673)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:386)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:196)
 

[Ilja Preuss]

Eclipse has two different runners for JUnit 3 and JUnit 4 tests. Your test suite is JUnit 3 - style (see http://radio.javaranch.com/lasse/2006/07/27/1154024535662.html for how to do it JUnit 4 - style).

When you run the test from Eclipse, make sure that the launch configuration is configured for the correct version of JUnit. If you don't, you will get exactly the error message you got.

I think there is also a global setting for what Eclipse will use as default.

[Rick Shroff]

Hi Ilja,

Eclipse has two different runners for JUnit 3 and JUnit 4 tests. Your test suite is JUnit 3 - style (see http://radio.javaranch.com/lasse/2006/07/27/1154024535662.html for how to do it JUnit 4 - style).

I went to the above link ans was able to successfully run the TestSuite. Thanks a lot. I think this URL link is one of the very rare places where this is documented.

When you run the test from Eclipse, make sure that the launch configuration is configured for the correct version of JUnit. If you don't, you will get exactly the error message you got.

I think there is also a global setting for what Eclipse will use as default

For changing Launch Configuration, I navigated to Windows--->Preferences --->Launcing --> Launch Configurations. But did not change anything. Did not know how to do it.

Any way it seems to be picking up the JUnit version correctly from the Libraries specified in the JavaBuild Path.

Thanks Again!!