old_contents: from awsflow.core import AsyncEventLoop
  
  from awsflow.context import ContextBase
  
  
  class WorkflowTestingContext(ContextBase):
  
      def __init__(self):
          self._event_loop = AsyncEventLoop()
  
      def __enter__(self):
          self._context = self.get_context()
          self.set_context(self)
          self._event_loop.__enter__()
  
      def __exit__(self, exc_type, exc_val, exc_tb):
          if exc_type is None:
              self._event_loop.execute_all_tasks()
          self._event_loop.__exit__(exc_type, exc_val, exc_tb)
  
new_contents: from awsflow.core import AsyncEventLoop
  
  from awsflow.context import ContextBase
  
  
  class WorkflowTestingContext(ContextBase):
  
      def __init__(self):
          self._event_loop = AsyncEventLoop()
  
      def __enter__(self):
          try:
              self._context = self.get_context()
          except AttributeError:
              self._context = None
          self.set_context(self)
          self._event_loop.__enter__()
  
      def __exit__(self, exc_type, exc_val, exc_tb):
          if exc_type is None:
              self._event_loop.execute_all_tasks()
          self._event_loop.__exit__(exc_type, exc_val, exc_tb)
  
subject: Fix context setting on the test context