code: def test_edge_cases(self):
      self.assertRaises(TypeError, unicodedata.normalize)
      self.assertRaises(
          ValueError, unicodedata.normalize, "unknown", "xx"
      )
      self.assertEqual(unicodedata.normalize("NFKC", ""), "")
  
imports: import hashlib
  from http.client import HTTPException
  import sys
  import unicodedata
  import unittest
  from test.support import open_urlresource, requires_resource, script_helper, cpython_only, check_disallow_instantiation
label_desc: Use image node_id 5 for calling the NormalizationTest obj's underlying member method code with example usage: obj.test_edge_cases() without return types