Bug 62503 Classloader problem with older versions of JUnit [JUnit]
I have a project with a version 3.6 junit.jar on the classpath. In 3.0M8 when I run a test with an assertEquals() that fails, I get this error: java.lang.NoClassDefFoundError: junit/framework/ComparisonFailure at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.addFailure(RemoteTestRunner.java:533) at junit.framework.TestResult.addFailure(TestResult.java:46) at junit.framework.TestResult.runProtected(TestResult.java:127) at junit.framework.TestResult.run(TestResult.java:109) at junit.framework.TestCase.run(TestCase.java:131) at junit.framework.TestSuite.runTest(TestSuite.java:173) at junit.framework.TestSuite.run(TestSuite.java:168) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:410) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:294) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:182) Exception in thread "main" This used to work with Eclipse 2.1 (which also had JUnit 3.8.1 built in), and it disappears when I upgrade my copy of junit.jar to 3.8.1 to match the Eclipse one.
org.eclipse.jdt.junit.runtime/src/org/eclipse/jdt/internal/junit/runner/RemoteTestRunner.java
}
		Test test= null;
		try {
			test= (Test)suiteMethod.invoke(null, new Class[0]); 
		} 
		catch (InvocationTargetException e) {
			runFailed(JUnitMessages.getFormattedString("RemoteTestRunner.error.invoke", e.getTargetException().toString() )); 
			return null;
		}
		catch (IllegalAccessException e) {
			runFailed(JUnitMessages.getFormattedString("RemoteTestRunner.error.invoke", e.toString() )); 
			return null;
		}
		return test;
	}
	protected void runFailed(String message) {
		System.err.println(message);
	}
	
	/**
	 * Loads the test suite class.
	 */
	private Class loadSuiteClass(String className) throws ClassNotFoundException {
		if (className == null) 
			return null;
		return getClassLoader().loadClass(className);
	}
			
	/**
	 * Runs a set of tests.