code: def test_copy_to(self):
      curs = self.conn.cursor()
      try:
          self._copy_from(curs, nrecs=1024, srec=10 * 1024, copykw={})
          self._copy_to(curs, srec=10 * 1024)
      finally:
          curs.close()
  
imports: import io
  import sys
  import string
  import unittest
  from .testutils import ConnectingTestCase, skip_before_postgres, slow, StringIO
  from .testutils import skip_if_crdb
  from itertools import cycle
  from subprocess import Popen, PIPE
  import psycopg2
  import psycopg2.extensions
  from .testutils import skip_copy_if_green, TextIOBase
  from .testconfig import dsn
label_desc: Use image node_id 7 for calling the CopyTests obj's underlying member method code with example usage: obj.test_copy_to() without return types