class_docstr: Tests for RulesEngine
class_docstr_tok: ["Tests","for","RulesEngine"]
docstr: RulesEngine - Teardown
docstr_tok: ["RulesEngine","-","Teardown"]
code: def teardown(self):
      """RulesEngine - Teardown"""
      RulesEngine._config = None
      RulesEngine._lookup_tables = None
      RulesEngine._rule_table = None
      RulesEngine._threat_intel = None
      RulesEngine._alert_forwarder = None
      RulesEngine._RULE_TABLE_LAST_REFRESH = datetime(
          year=1970, month=1, day=1
      )
  
imports: from datetime import datetime, timedelta
  from mock import Mock, patch, PropertyMock
  from nose.tools import assert_equal, assert_false, assert_true
  from publishers.community.generic import remove_internal_fields
  from streamalert.shared.publisher import AlertPublisher, Register, DefaultPublisher
  import streamalert.rules_engine.rules_engine
  from streamalert.rules_engine.rules_engine import RulesEngine
label_desc: Use image node_id 2 for calling the TestRulesEngine obj's underlying member method code with example usage: obj.teardown() without return types