code: def test_attributes(self):
      x = keras_tensor.KerasTensor(
          shape=(3,), dtype="float32", sparse=True
      )
      self.assertEqual(x.dtype, "float32")
      self.assertEqual(x.shape, (3,))
      self.assertEqual(x.sparse, True)
  
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 1 for calling the KerasTensorTest obj's underlying member method code with example usage: obj.test_attributes() without return types