code: def test_build(self):
      text = "test"
      output = gokart.build(
          _DummyTask(param=text), reset_register=False
      )
      self.assertEqual(output, text)
  
imports: import logging
  import os
  import unittest
  from copy import copy
  import luigi
  import luigi.mock
  import gokart
  from gokart.build import GokartBuildError, LoggerConfig
label_desc: Use image node_id 3 for calling the RunTest obj's underlying member method code with example usage: obj.test_build() without return types