class_docstr: Normalizer tests
class_docstr_tok: ["Normalizer","tests"]
code: def _test_record(cls):
      return {
          "account": 123456,
          "region": "region_name",
          "detail": {
              "awsRegion": "region_name",
              "source": "1.1.1.2",
              "userIdentity": {
                  "userName": "Alice",
                  "invokedBy": "signin.amazonaws.com",
              },
          },
          "sourceIPAddress": "1.1.1.3",
      }
  
imports: from mock import Mock, patch
  from nose.tools import assert_equal, assert_false, assert_raises, assert_true
  from streamalert.shared.exceptions import ConfigError
  from streamalert.shared.normalize import Normalizer, NormalizedType
  from tests.unit.streamalert.shared.test_utils import MOCK_RECORD_ID
label_desc: Use image node_id 2 for calling the TestNormalizer obj's underlying member method code with example usage: obj._test_record(cls) and returns: dict