new_contents: # -*- coding: utf-8 -*-
  
  from pmdarima.metrics import smape
  import numpy as np
  import pytest
  
  
  @pytest.mark.parametrize(
      'actual,forecasted,expected', [
          pytest.param([0.07533, 0.07533, 0.07533, 0.07533,
                        0.07533, 0.07533, 0.0672, 0.0672],
                       [0.102, 0.107, 0.047, 0.1,
                        0.032, 0.047, 0.108, 0.089], 42.60306631890196),
      ]
  )
  def test_smape(actual, forecasted, expected):
      err = smape(actual, forecasted)
      assert np.allclose(expected, err)
  
subject: Add unit test for SMAPE