code: def testPadShapeMiddleWithOnes(self):
      # Test nominal behavior.
      x = np.ones([2, 3, 5], np.float32)
      self.assertAllEqual(
          self.evaluate(util.pad_shape_with_ones(x, 3)).shape,
          [2, 3, 5, 1, 1, 1],
      )
  
      self.assertAllEqual(
          self.evaluate(util.pad_shape_with_ones(x, 3, start=-2)).shape,
          [2, 3, 1, 1, 1, 5],
      )
  
      self.assertAllEqual(
          self.evaluate(util.pad_shape_with_ones(x, 3, start=-3)).shape,
          [2, 1, 1, 1, 3, 5],
      )
  
imports: from absl.testing import parameterized
  import numpy
  import tensorflow.compat.v1
  import tensorflow.compat.v2
  from tensorflow_probability.python.internal import tensorshape_util
  from tensorflow_probability.python.internal import test_util
  from tensorflow_probability.python.math.gradient import value_and_gradient
  from tensorflow_probability.python.math.psd_kernels.internal import util
label_desc: Use image node_id 3 for calling the UtilTest obj's underlying member method code with example usage: obj.testPadShapeMiddleWithOnes() without return types