code: def test_str(self):
      strategy = self._get_query_strategy()
      expected_str = "BALD(dropout_samples=10)"
      self.assertEqual(expected_str, str(strategy))
  
file_path: small-text/tests/unit/small_text/query_strategies/test_bayesian.py
imports: import unittest
  import numpy
  from small_text.classifiers import ConfidenceEnhancedLinearSVC
  from small_text.query_strategies.bayesian import BALD, _bald
  from tests.utils.datasets import random_sklearn_dataset
  from tests.utils.testing import assert_array_equal
label_desc: Use image node_id 4 for calling the BALDTest obj's underlying member method code with example usage: obj.test_str() without return types