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
}
	
	private void notifyTestReran(TestResult result, String testId, String testClass, String testName) {
		TestFailure failure= null;
		if (result.errorCount() > 0) {
			failure= (TestFailure)result.errors().nextElement();
		}
		if (result.failureCount() > 0) {
			failure= (TestFailure)result.failures().nextElement();
		}
		if (failure != null) {
			Throwable t= failure.thrownException();
			
			if ("3".equals(fVersion)) { 
			    if (t instanceof ComparisonFailure) {
			        
			        String expected = getField(t, "fExpected"); 
			        String actual = getField(t, "fActual"); 
			        if (expected != null && actual != null) {
			    	    sendMessage(MessageIds.EXPECTED_START);
			    	    sendMessage(expected);
			    	    sendMessage(MessageIds.EXPECTED_END);
			    	    
			    	    sendMessage(MessageIds.ACTUAL_START);
			    	    sendMessage(actual);
			    	    sendMessage(MessageIds.ACTUAL_END);
			    	    			    	    			       }
			    }
			}
			String trace= getTrace(t);