code: def testGetTensorflowRuntime(self):
      self.assertEqual(
          "1.14", prediction_clients._get_tf_runtime_version("1.14")
      )
      self.assertEqual(
          "1.15", prediction_clients._get_tf_runtime_version("1.15.0")
      )
      self.assertEqual(
          "1.15", prediction_clients._get_tf_runtime_version("1.15.1")
      )
      self.assertEqual(
          "1.15", prediction_clients._get_tf_runtime_version("2.0.0")
      )
      self.assertEqual(
          "1.15", prediction_clients._get_tf_runtime_version("2.0.1")
      )
      self.assertEqual(
          "2.1", prediction_clients._get_tf_runtime_version("2.1.0")
      )
  
imports: import tensorflow
  from tfx.extensions.google_cloud_ai_platform import prediction_clients
label_desc: Use image node_id 1 for calling the PredictionClientTest obj's underlying member method code with example usage: obj.testGetTensorflowRuntime() without return types