code: def test_padding_2d(self):
      a = pad.create([pad.causal, pad.full], [3], [1, 1], 2, -1)
      self.assertEqual(a, [[0, 0], [2, 0], [2, 2], [0, 0]])
  
file_path: sonnet/sonnet/src/pad_test.py
imports: from absl.testing import parameterized
  from sonnet.src import pad
  from sonnet.src import test_utils
  import tensorflow
label_desc: Use image node_id 1 for calling the PadTest obj's underlying member method code with example usage: obj.test_padding_2d() without return types