code: def test_fields(self):
      output = _create_trials()[0]
      self.assertEqual(output.id, 99)
      self.assertEqual(output.final_measurement.objective_value, 0.97)
  
imports: from absl.testing import absltest
  from model_search.metadata import trial
label_desc: Use image node_id 2 for calling the TrialTest obj's underlying member method code with example usage: obj.test_fields() without return types