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Bug 312798

Summary:	ClassCastException when running ds.tests project's launch configuration
Product:	[Eclipse Project] PDE	Reporter:	Stoyan Boshev <s.boshev>
Component:	UI	Assignee:	PDE-UI-Inbox <pde-ui-inbox>
Status:	CLOSED DUPLICATE	QA Contact:
Severity:	normal
Priority:	P3	CC:	darin.eclipse, markus.kell.r, tjwatson
Version:	3.6
Target Milestone:	---
Hardware:	PC
OS:	Windows XP
Whiteboard:

Description Stoyan Boshev

2010-05-13 10:40:02 EDT

Using Eclipse3.6M7

If I try to run the launch configuration "All DS Tests" provided by the project org.eclipse.equinox.ds.tests it fails to run because of a ClassCastException (see below). This happens if I run with JDK1.5+. If I run it with JDK1.4.2 the configuration is successfully run.

java.lang.ClassCastException: junit.framework.TestSuite cannot be cast to junit.framework.Test
	at org.eclipse.jdt.internal.junit.runner.junit3.JUnit3TestLoader.getTest(JUnit3TestLoader.java:108)
	at org.eclipse.jdt.internal.junit.runner.junit3.JUnit3TestLoader.loadTests(JUnit3TestLoader.java:59)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:452)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
	at org.eclipse.pde.internal.junit.runtime.RemotePluginTestRunner.main(RemotePluginTestRunner.java:62)
	at org.eclipse.pde.internal.junit.runtime.CoreTestApplication.run(CoreTestApplication.java:23)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)
	at org.eclipse.equinox.internal.app.EclipseAppContainer.callMethodWithException(EclipseAppContainer.java:587)
	at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:198)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:369)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)
	at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:619)
	at org.eclipse.equinox.launcher.Main.basicRun(Main.java:574)
	at org.eclipse.equinox.launcher.Main.run(Main.java:1407)
	at org.eclipse.equinox.launcher.Main.main(Main.java:1383)



Steps to reproduce:
- import the project org.eclipse.equinox.ds.tests from the rt repository (it is located here: org.eclipse.equinox/compendium/bundles/org.eclipse.equinox.ds.tests) 
- run the junit launch configuration "All DS Tests" with JDK1.5 or higher


I have debugged the problem and it seems that it is caused because there are two "org.junit" bundles with different versions in the target platform. When running the configuration, PDE selects the bundle with higher version and this causes the problem. 
It is strange that this problem does not happen when running the launch configuration of project osgi.tests. It seems identical as the one of ds.tests.

Comment 1 Darin Wright

2010-05-13 10:47:11 EDT

Markus, is this a JUnit 3 vs. 4 issue?

Comment 2 Markus Keller

2010-05-13 12:35:32 EDT

Yes, see bug 296104. I always said the org.junit plug-ins should be singletons, so that such problems can at least be detected by OSGi, but I've been overruled.

Comment 3 Darin Wright

2010-05-13 13:11:00 EDT


*** This bug has been marked as a duplicate of bug 296104 ***

Comment 4 Thomas Watson

2010-05-13 14:22:39 EDT

Stoyan, I figured out why ds.tests is failing to work but osgi.tests is working.  Your test bundle puts a limit on the import-package range.  If you remove the Import-Package for junit and instead use Require-Bundle on junit with no range then it seems to work.

Comment 5 Stoyan Boshev

2010-05-14 04:52:50 EDT

(In reply to comment #4)
> Stoyan, I figured out why ds.tests is failing to work but osgi.tests is
> working.  Your test bundle puts a limit on the import-package range.  If you
> remove the Import-Package for junit and instead use Require-Bundle on junit
> with no range then it seems to work.

Thanks Thomas! It works this way