docstr: Test that returning a non-zero value stops the operation in progress.
code: def test_cancel_operation(self):
      """
      Test that returning a non-zero value stops the operation in progress.
      """
  
      def progress():
          return 1
  
      self.con.set_progress_handler(progress, 1)
      curs = self.con.cursor()
      self.assertRaises(
          sqlite.OperationalError,
          curs.execute,
          "create table bar (a, b)",
      )
  
imports: import contextlib
  import sqlite3
  import unittest
  from test.support.os_helper import TESTFN, unlink
  from .util import memory_database, cx_limit, with_tracebacks
  from .util import MemoryDatabaseMixin
label_desc: Use image node_id 3 for calling the ProgressTests obj's underlying member method code with example usage: obj.test_cancel_operation() and returns: int