code: def test_repr(self):
      transform = PadToWidth(width=100)
      self.assertEqual(
          repr(transform),
          ("PadToWidth(width=100, pad_cfg={'type': 'Pad'})"),
      )
  
imports: import copy
  import unittest
  import numpy
  from parameterized import parameterized
  from mmocr.datasets.transforms import CropHeight, ImageContentJitter, PadToWidth, PyramidRescale, RescaleToHeight, ReversePixels, TextRecogGeneralAug
label_desc: Use image node_id 2 for calling the TestPadToWidth obj's underlying member method code with example usage: obj.test_repr() without return types