class_docstr: Class to test the AutoML flow
      
class_docstr_tok: ["Class","to","test","the","AutoML","flow"]
docstr: Tests CV Scores retrieval and plotting
docstr_tok: ["Tests","CV","Scores","retrieval","and","plotting"]
code: def test_cv_retrieval_plotting(self):
      """
      Tests CV Scores retrieval and plotting
      """
  
      print("\n\n" + "*" * 50)
      print("Performing Unit Test: 'test_cv_retrieval_plotting'")
      print("*" * 50 + "\n\n")
  
      # import numpy as np  # type: ignore
      # from auto_ts import auto_timeseries as ATS
  
      automl_model = ATS(
          score_type="rmse",
          forecast_period=self.forecast_period,
          time_interval="Month",
          non_seasonal_pdq=None,
          seasonality=False,
          seasonal_period=12,
          model_type=["ML", "auto_SARIMAX"],
          verbose=0,
      )
      automl_model.fit(
          traindata=self.train_multivar,
          ts_column=self.ts_column,
          target=self.target,
          cv=2,
          sep=self.sep,
      )
  
      cv_scores_gold = pd.DataFrame(
          {
              "Model": ["auto_SARIMAX", "auto_SARIMAX", "ML", "ML"],
              # 'CV Scores': [73.2824, 185.705, 93.0305, 67.304]
              "CV Scores": [
                  100.816639,
                  147.703077,
                  107.2037,
                  81.7406,
              ],  # With more engineered features (AutoViML)
          }
      )
      cv_scores = automl_model.get_cv_scores()
      assert_frame_equal(cv_scores, cv_scores_gold)
  
      automl_model.plot_cv_scores()
  
imports: import sys
  import os
  import unittest
  import math
  import numpy
  import pandas
  from pandas.testing import assert_series_equal
  from pandas.testing import assert_frame_equal
  from prophet.forecaster import Prophet
  from statsmodels.tsa.statespace.sarimax import SARIMAXResultsWrapper
  from sklearn.base import BaseEstimator
  from auto_ts import auto_timeseries
label_desc: Use image node_id 8 for calling the TestAutoTS obj's underlying member method code with example usage: obj.test_cv_retrieval_plotting() without return types