code: def testQuote(self):
      safeunquoted = string.ascii_letters + string.digits + "@%_-+=:,./"
      unicode_sample = (
          "\xe9\xe0\xdf"  # e + acute accent, a + grave, sharp s
      )
      unsafe = '"`$\\!' + unicode_sample
  
      self.assertEqual(shlex.quote(""), "''")
      self.assertEqual(shlex.quote(safeunquoted), safeunquoted)
      self.assertEqual(
          shlex.quote("test file name"), "'test file name'"
      )
      for u in unsafe:
          self.assertEqual(
              shlex.quote("test%sname" % u), "'test%sname'" % u
          )
      for u in unsafe:
          self.assertEqual(
              shlex.quote("test%s'name'" % u),
              "'test%s'\"'\"'name'\"'\"''" % u,
          )
  
imports: import io
  import itertools
  import shlex
  import string
  import unittest
label_desc: Use image node_id 18 for calling the ShlexTest obj's underlying member method code with example usage: obj.testQuote() without return types