text: import os
  import unittest
  
  from unittest.mock import patch, MagicMock
  
  from sosw.worker import Worker
  
  
  os.environ["STAGE"] = "test"
  os.environ["autotest"] = "True"
  
  
  class Worker_UnitTestCase(unittest.TestCase):
  
      def setUp(self):
          self.patcher = patch("sosw.app.get_config")
          self.get_config_patch = self.patcher.start()
  
  
      def tearDown(self):
          self.patcher.stop()
  
          try:
              del (os.environ['AWS_LAMBDA_FUNCTION_NAME'])
          except Exception:
              pass
  
  
      def test_mark_task_as_completed__called(self):
          with patch('boto3.client'):
              p = Worker()
  
          p.mark_task_as_completed = MagicMock(return_value=None)
  
          p({'task_id': '123'})
          p.mark_task_as_completed.assert_called_once_with('123')
  