code: def test_big_unicode_encode(self):
      u = "\U0001d120"
      self.assertEqual(json.dumps(u), '"\\ud834\\udd20"')
      self.assertEqual(
          json.dumps(u, ensure_ascii=False), '"\U0001d120"'
      )
  
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 7 for calling the TestUnicode obj's underlying member method code with example usage: obj.test_big_unicode_encode() without return types