class_docstr: Test class for AlertForwarder
code: def setup(self):
      self.forwarder = AlertForwarder()
  
file_path: streamalert/tests/unit/streamalert/rules_engine/test_alerter.py
imports: import os
  from botocore.exceptions import ClientError
  from mock import Mock, patch
  from streamalert.rules_engine.alert_forwarder import AlertForwarder
label_desc: Use image node_id 1 for calling the TestAlertForwarder obj's underlying member method code with example usage: obj.setup() without return types