code: def _test_user_import_e2e(self, extra_opts=None):
      if extra_opts is None:
          extra_opts = []
  
      MAX_UPDATES = 50
      user_dir = self._get_user_dir()
      with make_temp_dir() as temp_dir:
          opts = [
              "model=simple",
              "run_type=train_val_test",
              "dataset=always_one",
              "config=configs/experiment.yaml",
              f"env.user_dir={user_dir}",
              "training.seed=1",
              "training.num_workers=3",
              f"training.max_updates={MAX_UPDATES}",
              f"env.save_dir={temp_dir}",
          ]
          opts = opts + extra_opts
          out = io.StringIO()
          with contextlib.redirect_stdout(out):
              run(opts)
          train_log = os.path.join(temp_dir, "train.log")
          log_line = search_log(
              train_log,
              search_condition=[
                  lambda x: x["progress"]
                  == f"{MAX_UPDATES}/{MAX_UPDATES}",
                  lambda x: "best_val/always_one/accuracy" in x,
              ],
          )
          self.assertEqual(
              float(log_line["val/always_one/accuracy"]), 1
          )
  
          log_line = search_log(
              train_log,
              search_condition=[
                  lambda x: x["progress"]
                  == f"{MAX_UPDATES}/{MAX_UPDATES}",
                  lambda x: "test/always_one/accuracy" in x,
              ],
          )
          self.assertEqual(
              float(log_line["test/always_one/accuracy"]), 1
          )
  
imports: import contextlib
  import io
  import os
  import sys
  import unittest
  from mmf.common.registry import registry
  from mmf.utils.configuration import get_mmf_env
  from mmf.utils.env import import_user_module, setup_imports
  from mmf.utils.general import get_mmf_root
  from mmf_cli.run import run
  from tests.test_utils import make_temp_dir, search_log
label_desc: Use image node_id 6 for calling the TestUtilsEnvE2E obj's underlying member method code with example usage: obj._test_user_import_e2e(extra_opts) without return types