code: def test_actual_results_max_abs_scaler():
      """Test that the actual results are the expected ones."""
      arr_actual = MaxAbsScaler().fit_transform(X)
      arr_desired = X / np.abs(X).max(axis=1)[:, None]
      np.testing.assert_allclose(
          arr_actual, arr_desired, atol=1e-5, rtol=0.0
      )
  
imports: import numpy
  import pytest
  from pyts.preprocessing import StandardScaler, MinMaxScaler, MaxAbsScaler, RobustScaler
label_desc: Use image node_id 3 for calling a global function with example usage: test_actual_results_max_abs_scaler() without return types