class_docstr: RegisterInput tests
class_docstr_tok: ["RegisterInput","tests"]
docstr: RegisterInput - Load For Service
docstr_tok: ["RegisterInput","-","Load","For","Service"]
code: def test_load_for_service(self):
      """RegisterInput - Load For Service"""
      loaded_input = RegisterInput.load_for_service(
          self._service, "resource", "record"
      )
      assert_equal(isinstance(loaded_input, self._class), True)
  
file_path: streamalert/tests/unit/streamalert/classifier/payload/test_payload_base.py
imports: import json
  from mock import patch
  from nose.tools import assert_equal
  from streamalert.classifier.payload.payload_base import RegisterInput, StreamPayload
label_desc: Use image node_id 2 for calling the TestRegisterInput obj's underlying member method code with example usage: obj.test_load_for_service() without return types