code: def test_to_csv_to_stdout(self):
      table = Table(self.rows, self.column_names, self.column_types)
  
      output = StringIO()
      table.to_csv(output)
  
      contents1 = output.getvalue()
  
      with open("examples/test.csv") as f:
          contents2 = f.read()
  
      self.assertEqual(contents1, contents2)
  
file_path: agate/tests/test_table/test_to_csv.py
imports: import os
  import sys
  from io import StringIO
  from agate import Table
  from agate.data_types import Boolean, Date, DateTime, Number, Text, TimeDelta
  from agate.testcase import AgateTestCase
label_desc: Use image node_id 4 for calling the TestToCSV obj's underlying member method code with example usage: obj.test_to_csv_to_stdout() without return types