docstr: StreamQuery - AthenaQueryExecution - completion_datetime
docstr_tok: ["StreamQuery","-","AthenaQueryExecution","-","completion_datetime"]
code: def test_completion_datetime(self):
      """StreamQuery - AthenaQueryExecution - completion_datetime"""
      assert_equals(
          self._succeeded_execution.completion_datetime,
          datetime(2019, 6, 5, 21, 50, 21, 770000, tzinfo=tzlocal()),
      )
  
imports: from datetime import datetime
  from dateutil.tz import tzlocal
  from mock import MagicMock
  from nose.tools import assert_equals, assert_true, assert_false
  from streamalert.scheduled_queries.handlers.athena import AthenaClient, AthenaQueryExecution, AthenaQueryResult
label_desc: Use image node_id 7 for calling the TestAthenaQueryExecution obj's underlying member method code with example usage: obj.test_completion_datetime() without return types