JUnit 4 multithreaded runners

Folks,

 

I have a large body of test cases that ideally I'd like to run in
multiple threads.  In JUnit 3.8 I see javadoc for a multithreaded test
suite junit.extensions.ActiveTestSuite.  I don't see anything analogous
in JUnit 4.  It seems that in JUnit 4 this really needs to be done as a
Runner.

 

I got rough modified versions org.junit.internal.runners.CompositeRunner
and org.junit.runners.Parameterized working in multithreaded mode, using
a pool of threads to run each test returned by the @Parameters method in
a thread.

 

I see a possible thread safety problem in
org.junit.runner.notification.RunNotifier.  If a listener throws an
exception, the notifier tries to remove it from the listener collection.
I am not sure but I think that this might cause problems when
multithreaded.  (I've never had a listener throw, however.)

 

I am planning to look at multithreaded versions for some of the other
runners.  If anyone else has ideas or is already doing this, please let
me know?  

 

Thanks,

Jeff Clary

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