class_docstr: Test class for ParserBase classmethods
class_docstr_tok: ["Test","class","for","ParserBase","classmethods"]
docstr: ParserBase - Default Optional Type, List
docstr_tok: ["ParserBase","-","Default","Optional","Type",",","List"]
code: def test_default_optional_values_list(self):
      """ParserBase - Default Optional Type, List"""
      assert_equal(ParserBase.default_optional_values(list()), [])
  
imports: import json
  from mock import patch
  from nose.tools import assert_equal
  import streamalert.classifier.parsers
  from streamalert.classifier.parsers import ParserBase
label_desc: Use image node_id 5 for calling the TestParserBaseClassMethods obj's underlying member method code with example usage: obj.test_default_optional_values_list() without return types