class_docstr: TestRunner to handle running various tests
code: def _is_filtered(self):
      return bool(self._files_filter or self._rules)
  
imports: import argparse
  import os
  import jmespath
  from mock import patch, MagicMock
  from streamalert.alert_processor import main
  from streamalert.alert_processor.helpers import compose_alert
  from streamalert.alert_processor.outputs.output_base import OutputDispatcher
  from streamalert.classifier import classifier
  from streamalert.rules_engine import rules_engine
  from streamalert.shared import rule
  from streamalert.shared.config import ConfigError
  from streamalert.shared.logger import get_logger
  from streamalert.shared.stats import RuleStatisticTracker
  from streamalert_cli.helpers import check_credentials
  from streamalert_cli.test.format import format_green, format_red, format_underline, format_yellow
  from streamalert_cli.test.mocks import LookupTableMocks, ThreatIntelMocks
  from streamalert_cli.test.event_file import TestEventFile
  from streamalert_cli.utils import CLICommand, DirectoryType, generate_subparser, UniqueSortedFileListAction, UniqueSortedListAction
label_desc: Use image node_id 8 for calling the TestRunner obj's underlying member method code with example usage: obj._is_filtered() and returns: bool