code: def test_representation(self):
      x = keras_tensor.KerasTensor(shape=(3, 4), dtype="float32")
      self.assertIn("<KerasTensor shape=(3, 4)", repr(x))
  
imports: from unittest.mock import Mock
  from unittest.mock import patch
  import numpy
  import tensorflow
  from keras import backend
  from keras import ops
  from keras import testing
  from keras.backend.common import keras_tensor
label_desc: Use image node_id 5 for calling the KerasTensorTest obj's underlying member method code with example usage: obj.test_representation() without return types