code: def test_unicode(self):
      with dbm.ndbm.open(self.filename, "c") as db:
          db["Unicode key \U0001f40d"] = "Unicode value \U0001f40d"
      with dbm.ndbm.open(self.filename, "r") as db:
          self.assertEqual(
              list(db.keys()), ["Unicode key \U0001f40d".encode()]
          )
          self.assertTrue("Unicode key \U0001f40d".encode() in db)
          self.assertTrue("Unicode key \U0001f40d" in db)
          self.assertEqual(
              db["Unicode key \U0001f40d".encode()],
              "Unicode value \U0001f40d".encode(),
          )
          self.assertEqual(
              db["Unicode key \U0001f40d"],
              "Unicode value \U0001f40d".encode(),
          )
  
imports: from test.support import import_helper
  from test.support import os_helper
  import os
  import unittest
  import dbm.ndbm
  from dbm.ndbm import error
label_desc: Use image node_id 8 for calling the DbmTestCase obj's underlying member method code with example usage: obj.test_unicode() without return types