code: def test_init_invalid_min_delta(self):
      with self.assertRaisesRegex(
          ValueError,
          'Invalid value encountered: "min_delta" needs to be',
      ):
          EarlyStopping(self.get_metric(), min_delta=-0.01)
  
imports: import unittest
  from small_text.training.early_stopping import EarlyStopping, NoopEarlyStopping, EarlyStoppingAndCondition, EarlyStoppingOrCondition
  from small_text.training.metrics import Metric
label_desc: Use image node_id 2 for calling the GeneralEarlyStoppingTest obj's underlying member method code with example usage: obj.test_init_invalid_min_delta() without return types