code: def test_repr(self):
      transform = Invert(prob=1.0)
      self.assertEqual(
          repr(transform),
          (
              "Invert(prob=1.0, "
              "level=None, "
              "min_mag=0.1, "
              "max_mag=1.9)"
          ),
      )
  
imports: import copy
  import unittest
  from mmdet.datasets.transforms import AutoContrast, Brightness, Color, ColorTransform, Contrast, Equalize, Invert, Posterize, Sharpness, Solarize, SolarizeAdd
  from .utils import check_result_same, construct_toy_data
label_desc: Use image node_id 3 for calling the TestInvert obj's underlying member method code with example usage: obj.test_repr() without return types