docstr: StreamQuery - QueryPack - load_from_cache - not in cache
docstr_tok: ["StreamQuery","-","QueryPack","-","load_from_cache","-","not","in","cache"]
code: def test_load_from_cache_none(self):
      """StreamQuery - QueryPack - load_from_cache - not in cache"""
      self._execution.state_manager.has.return_value = False
      self._query_pack.load_from_cache()
      assert_equals(self._query_pack.query_execution_id, None)
      assert_false(self._query_pack.is_previously_started)
  
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 6 for calling the TestQueryPack obj's underlying member method code with example usage: obj.test_load_from_cache_none() without return types