docstr: Test default selection for integer index
docstr_tok: ["Test","default","selection","for","integer","index"]
code: def test_default_parameters(self):
      """Test default selection for integer index"""
      series = TimeSeries.from_values(np.arange(1, 30, 1))
      model = ExponentialSmoothing()
      model.fit(series)
      assert model.seasonal_periods == 12
  
file_path: darts/darts/tests/models/forecasting/test_exponential_smoothing.py
imports: import numpy
  import pytest
  from darts import TimeSeries
  from darts.models import ExponentialSmoothing
  from darts.utils import timeseries_generation
label_desc: Use image node_id 2 for calling the TestExponentialSmoothing obj's underlying member method code with example usage: obj.test_default_parameters() without return types