code: def test_transform(self):
      values = pandas.DataFrame(
          {
              "email": [
                  "montana@instacart.com",
                  "sue-bob+anne@instacart.com",
              ]
          }
      )
      result = self.transformer.transform(values)
      self.assertEqual(
          result.tolist(),
          numpy.repeat("instacart.com", len(values)).tolist(),
      )
  
imports: import unittest
  import datetime
  import math
  import numpy
  import pandas
  import lore.transformers
label_desc: Use image node_id 2 for calling the TestEmailDomain obj's underlying member method code with example usage: obj.test_transform() without return types