docstr: StreamQuery - QueryPack - load_query_execution
docstr_tok: ["StreamQuery","-","QueryPack","-","load_query_execution"]
code: def test_query_execution_load(self):
      """StreamQuery - QueryPack - load_query_execution"""
  
      self._config.generate_query.return_value = "MOCK QUERY STRING"
      self._execution.athena_client.run_async_query.return_value = (
          "query_id"
      )
  
      self._query_pack.start_query()
  
      mock_execution = MagicMock(name="MockedQueryExecution")
      self._execution.athena_client.get_query_execution.return_value = (
          mock_execution
      )
  
      assert_equals(
          self._query_pack.load_query_execution(), mock_execution
      )
      assert_equals(self._query_pack.query_execution, mock_execution)
  
imports: from datetime import datetime, timezone
  from mock import MagicMock, patch
  from nose.tools import assert_equals, assert_false, assert_true
  from streamalert.scheduled_queries.query_packs.manager import QueryPack, QueryPacksManager, QueryPackExecutionContext, QueryPacksManagerFactory
  from streamalert.scheduled_queries.query_packs.parameters import QueryParameterGenerator
label_desc: Use image node_id 9 for calling the TestQueryPack obj's underlying member method code with example usage: obj.test_query_execution_load() without return types