code: def test_th_improvement_rate__rate_gt_1(self):
      original_th = 0.5
      optimized_th = 1
      res = OptimizeInferenceResult(
          original_model=MagicMock(throughput=original_th),
          hardware_setup=MagicMock(),
          optimized_model=MagicMock(throughput=optimized_th),
      )
      self.assertGreater(res.throughput_improvement_rate, 1)
  
imports: import unittest
  from unittest.mock import MagicMock
  from nebullvm.core.models import OptimizeInferenceResult
label_desc: Use image node_id 9 for calling the TestOptimizeInferenceResult obj's underlying member method code with example usage: obj.test_th_improvement_rate__rate_gt_1() without return types