code: def testEmptyTensor(self):
      for t in [
          np.float16,
          np.float32,
          np.float64,
          dtypes.bfloat16.as_numpy_dtype,
      ]:
          self._testAll(
              np.random.rand(0, 3, 4).astype(t),
              [[0, 0], [2, 1], [2, 3]],
              0.0,
          )
  
imports: import numpy
  from tensorflow.python.framework import constant_op
  from tensorflow.python.framework import dtypes
  from tensorflow.python.framework import errors
  from tensorflow.python.framework import ops
  from tensorflow.python.framework import test_util
  from tensorflow.python.ops import array_ops
  from tensorflow.python.ops import gradient_checker_v2
  from tensorflow.python.platform import test
label_desc: Use image node_id 20 for calling the PadOpTest obj's underlying member method code with example usage: obj.testEmptyTensor() without return types