Thursday, May 24, 2007

Problem: cannot find symbol constructor TestCase()

I was struggling with a strange problem for a few days. Now I found partially the reason of the problem. A very simple test class didn't compile in my project:

import junit.framework.TestCase;

public class MyTest extends TestCase {
public void testMe() {

The IDE (intellij) didn't compile it by saying:

cannot find symbol constructor TestCase()

This was very strange at first. After lots of trials and errors I found out that the reason for this compile error was that there was a conflict between the dependencies. Specifically the conflict was between junit.jar and repast.jar.

When repast.jar has a higher order than junit.jar then the test class doesn't compile. I didn't understand exactly why it occurred but it seems that it has a relation to the classpath declaration in the file of repast.jar, which states:

Class-Path: lib/junit.jar lib/log4j-1.2.8.jar lib/openmap.jar lib/plot.jar

Moreover repast's own junit has a smaller version than 3.8.

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