code: def test_init_default(self):
      stopping_criterion = DeltaFScore(2)
  
      self.assertEqual(2, stopping_criterion.num_classes)
      self.assertEqual(3, stopping_criterion.window_size)
      self.assertEqual(0.05, stopping_criterion.threshold)
      self.assertIsNone(stopping_criterion.last_predictions)
      self.assertEqual([], stopping_criterion.delta_history)
  
file_path: small-text/tests/unit/small_text/stopping_criteria/test_base.py
imports: import unittest
  import numpy
  from numpy.testing import assert_array_equal, assert_array_almost_equal
  from small_text.stopping_criteria.base import DeltaFScore
label_desc: Use image node_id 1 for calling the DeltaFScoreTest obj's underlying member method code with example usage: obj.test_init_default() without return types