code: def test_sniffer(self):
      with open("examples/test.csv", encoding="utf-8") as f:
          contents = f.read()
          direct = (
              csv.Sniffer()
              .sniff(contents, csv_py3.POSSIBLE_DELIMITERS)
              .__dict__
          )
          actual = csv_py3.Sniffer().sniff(contents).__dict__
          expected = csv.Sniffer().sniff(contents).__dict__
  
          self.assertEqual(
              direct, expected, f"{direct!r} != {expected!r}"
          )
          self.assertEqual(
              actual, expected, f"{actual!r} != {expected!r}"
          )
  
imports: import csv
  import os
  import platform
  import sys
  import unittest
  from io import StringIO
  from agate import csv_py3
  from agate.exceptions import FieldSizeLimitError
label_desc: Use image node_id 1 for calling the TestSniffer obj's underlying member method code with example usage: obj.test_sniffer() without return types