code: def test_no_coalescence(self):
      X = np.random.randint(0, 255, (3, 4))
      Y = NoCoalescence().fit_transform(X)
      np.testing.assert_array_almost_equal(Y, X)
      # Assert no copies were made
      self.assertEqual(id(X), id(Y))
  
file_path: auto-sklearn/test/test_pipeline/components/data_preprocessing/test_minority_coalescence.py
imports: import numpy
  import scipy.sparse
  from autosklearn.pipeline.components.data_preprocessing.minority_coalescense.minority_coalescer import MinorityCoalescer
  from autosklearn.pipeline.components.data_preprocessing.minority_coalescense.no_coalescense import NoCoalescence
  import unittest
label_desc: Use image node_id 2 for calling the MinorityCoalescerTest obj's underlying member method code with example usage: obj.test_no_coalescence() without return types