code: def test_run(self):
      padder = RawSequencePadder(pad_val=-1, ele_dtype=int, dtype=int)
      a = [[1, 2, 3], [3]]
      a = padder(a)
      shape = np.shape(a)
      assert shape == (2, 3)
      b = np.array([[1, 2, 3], [3, -1, -1]])
      assert (a == b).sum().item() == shape[0] * shape[1]
  
file_path: fastNLP/tests/core/collators/padders/test_raw_padder.py
imports: import numpy
  import pytest
  from fastNLP.core.collators.padders.raw_padder import RawNumberPadder, RawSequencePadder
  from fastNLP.core.collators.padders.exceptions import DtypeError
label_desc: Use image node_id 1 for calling the TestRawSequencePadder obj's underlying member method code with example usage: obj.test_run() without return types