code: def test_unicode_preservation(self):
      self.assertEqual(type(json.loads('""')), text_type)
      self.assertEqual(type(json.loads('"a"')), text_type)
      self.assertEqual(type(json.loads('["a"]')[0]), text_type)
  
imports: import sys
  import codecs
  from unittest import TestCase
  import simplejson
  from simplejson.compat import unichr, text_type, b, BytesIO
label_desc: Use image node_id 12 for calling the TestUnicode obj's underlying member method code with example usage: obj.test_unicode_preservation() without return types