code: def setUp(self):
      self.X_train = create_X()
  
file_path: auto-sklearn/test/test_pipeline/components/data_preprocessing/test_one_hot_encoding.py
imports: import numpy
  from scipy import sparse
  from autosklearn.pipeline.components.data_preprocessing.categorical_encoding.no_encoding import NoEncoding
  from autosklearn.pipeline.components.data_preprocessing.categorical_encoding.one_hot_encoding import OneHotEncoder
  from autosklearn.pipeline.util import _test_preprocessing
  import unittest
label_desc: Use image node_id 1 for calling the OneHotEncoderTest obj's underlying member method code with example usage: obj.setUp() without return types