code: def test_mode_not_min_max_raise_error(self):
      with self.assertRaises(ValueError):
          invalid_mode = "a_mode"
          EarlyStopping(
              monitor="val_dummy",
              mode=invalid_mode,
              min_delta=0,
              patience=2,
              verbose=False,
          )
  
imports: import unittest
  import torch
  import torch.nn
  from poutyne import Callback, EarlyStopping, Metric, Model
  from tests.framework.base import CaptureOutputBase
  from tests.framework.tools import some_data_generator
label_desc: Use image node_id 6 for calling the EarlyStoppingTest obj's underlying member method code with example usage: obj.test_mode_not_min_max_raise_error() without return types