chan = workflowService.getChannel(process, "test_channel");
process.start();
Map pd = chan.receiveMessage();
assertTrue (pd == null);
assertTrue (stateReached (process, "closed.completed"));
procDir.removeProcess(process);
} finally {
workflowService.release(chan);
workflowService.release (procDefDir);
workflowService.release (procDir);
}