code: def test_validate(self) -> None:
      val1 = self.mv[type(self.bn1)](self.bn1)
      val2 = self.mv[type(self.bn2)](self.bn2)
      val3 = self.mv[type(self.bn3)](self.bn3)
      vals = self.mv[type(self.bns)](self.bns)
  
      self.assertEqual(len(val1), 1)
      self.assertEqual(len(val2), 1)
      self.assertEqual(len(val3), 1)
      self.assertEqual(len(vals), 1)
  
      self.assertTrue(isinstance(val1[0], ShouldReplaceModuleError))
      self.assertTrue(isinstance(val2[0], ShouldReplaceModuleError))
      self.assertTrue(isinstance(val3[0], ShouldReplaceModuleError))
      self.assertTrue(isinstance(vals[0], ShouldReplaceModuleError))
  
file_path: opacus/opacus/tests/validators/batch_norm_test.py
imports: import unittest
  import torch.nn
  from opacus.validators.errors import ShouldReplaceModuleError
  from opacus.validators.module_validator import ModuleValidator
label_desc: Use image node_id 2 for calling the BatchNormValidator_test obj's underlying member method code with example usage: obj.test_validate() without return types