class_docstr: Test load pipeline
class_docstr_tok: ["Test","load","pipeline"]
code: def test_builtin(self):
      conf = AutoConfig.load_config("_builtin_pipeline")
  
      conf.param = 2
      p = AutoPipes.pipeline("_builtin_pipeline", conf)
      ret = p(10).get()[0]
      self.assertEqual(ret, 12)
  
file_path: towhee/tests/unittests/runtime/test_autos.py
imports: import pathlib
  import unittest
  from towhee import AutoConfig, AutoPipes
  from towhee.runtime.node_config import TowheeConfig
label_desc: Use image node_id 2 for calling the TestAutoPipes obj's underlying member method code with example usage: obj.test_builtin() without return types