code: def test_InitWithGeneratorRun(self) -> None:
      generator_run = GeneratorRun(arms=self.arms, weights=self.weights)
      batch = self.experiment.new_batch_trial(
          generator_run=generator_run
      )
      batch.add_arms_and_weights(arms=self.arms, weights=self.weights)
      self.assertEqual(
          self.batch.arms_by_name["0_0"], self.batch.arms[0]
      )
      self.assertEqual(
          self.batch.arms_by_name["0_1"], self.batch.arms[1]
      )
      self.assertEqual(len(batch.arms), len(self.arms))
      self.assertEqual(len(self.batch.generator_run_structs), 1)
  
imports: import math
  from time import sleep
  from unittest import mock
  from unittest.mock import patch, PropertyMock
  import numpy
  from ax.core.arm import Arm
  from ax.core.base_trial import TrialStatus
  from ax.core.batch_trial import BatchTrial, GeneratorRunStruct
  from ax.core.experiment import Experiment
  from ax.core.generator_run import GeneratorRun, GeneratorRunType
  from ax.core.parameter import FixedParameter, ParameterType
  from ax.core.search_space import SearchSpace
  from ax.runners.synthetic import SyntheticRunner
  from ax.utils.common.testutils import TestCase
  from ax.utils.common.typeutils import checked_cast
  from ax.utils.testing.core_stubs import get_abandoned_arm, get_arm, get_arm_weights1, get_arms, get_experiment, get_generator_run, get_generator_run2, get_weights
label_desc: Use image node_id 8 for calling the BatchTrialTest obj's underlying member method code with example usage: obj.test_InitWithGeneratorRun() without return types