code: def test_bad_data(self):
      values = pandas.DataFrame(
          {
              "phone": [
                  "1234567",
                  "(123)4567",
                  "",
                  None,
                  12345678901,
              ]
          }
      )
      result = self.transformer.transform(values)
      self.assertEqual(result.tolist(), ["", "", "", None, ""])
  
imports: import unittest
  import datetime
  import math
  import numpy
  import pandas
  import lore.transformers
label_desc: Use image node_id 3 for calling the TestAreaCode obj's underlying member method code with example usage: obj.test_bad_data() without return types