code: def test_invertible_mapper(self):
      test_cases = [(self.zeroes), ([self.zeroes, self.tens])]
  
      for data in test_cases:
          transformed = self.plus_ten_invertible.transform(data)
          back = self.plus_ten_invertible.inverse_transform(transformed)
          assert back == data
  
file_path: darts/darts/tests/dataprocessing/transformers/test_mappers.py
imports: import numpy
  import pandas
  from darts import TimeSeries
  from darts.dataprocessing.transformers.mappers import InvertibleMapper, Mapper
  from darts.utils.timeseries_generation import constant_timeseries, linear_timeseries
label_desc: Use image node_id 6 for calling the TestMappers obj's underlying member method code with example usage: obj.test_invertible_mapper() without return types