old_contents: import unittest
  
  from bndl.compute.run import create_ctx
  from bndl.util.conf import Config
  
  
  class ComputeTest(unittest.TestCase):
      worker_count = 3
  
      @classmethod
      def setUpClass(cls):
          config = Config()
          config['bndl.compute.worker_count'] = cls.worker_count
          config['bndl.net.listen_addresses'] = 'tcp://127.0.0.11:5000'
          cls.ctx = create_ctx(config, daemon=True)
          cls.ctx.await_workers(cls.worker_count)
  
      @classmethod
      def tearDownClass(cls):
          cls.ctx.stop()
  
  
  class DatasetTest(ComputeTest):
      pass
  
new_contents: import sys
  import unittest
  
  from bndl.compute.run import create_ctx
  from bndl.util.conf import Config
  
  
  class ComputeTest(unittest.TestCase):
      worker_count = 3
  
      @classmethod
      def setUpClass(cls):
          # Increase switching interval to lure out race conditions a bit ...
          cls._old_switchinterval = sys.getswitchinterval()
          sys.setswitchinterval(1e-6)
  
          config = Config()
          config['bndl.compute.worker_count'] = cls.worker_count
          config['bndl.net.listen_addresses'] = 'tcp://127.0.0.11:5000'
          cls.ctx = create_ctx(config, daemon=True)
          cls.ctx.await_workers(cls.worker_count)
  
      @classmethod
      def tearDownClass(cls):
          cls.ctx.stop()
          sys.setswitchinterval(cls._old_switchinterval)
  
  
  class DatasetTest(ComputeTest):
      pass
  
subject: Increase switching interval to lure out race conditions a bit ...