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
}
		}
	}
	
	/**
	 * Returns the Test corresponding to the given suite. 
	 */
	private Test getTest(String suiteClassName, String testName) {
		Class testClass= null;
		try {
			testClass= loadSuiteClass(suiteClassName);
		} catch (ClassNotFoundException e) {
			String clazz= e.getMessage();
			if (clazz == null) 
				clazz= suiteClassName;
			runFailed(JUnitMessages.getFormattedString("RemoteTestRunner.error.classnotfound", clazz)); 
			return null;
		} catch(Exception e) {
			runFailed(JUnitMessages.getFormattedString("RemoteTestRunner.error.exception", e )); 
			return null;
		}
		if (testName != null) {
			return setupTest(testClass, createTest(testName, testClass));
		}
		Method suiteMethod= null;
		try {
			suiteMethod= testClass.getMethod(SUITE_METHODNAME, new Class[0]);
	 	} catch(Exception e) {
	 		
			return new TestSuite(testClass);