code: def test_b16encode(self):
      eq = self.assertEqual
      eq(base64.b16encode(b"\x01\x02\xab\xcd\xef"), b"0102ABCDEF")
      eq(base64.b16encode(b"\x00"), b"00")
      # Non-bytes
      self.check_other_types(
          base64.b16encode, b"\x01\x02\xab\xcd\xef", b"0102ABCDEF"
      )
      self.check_encode_type_errors(base64.b16encode)
  
imports: import unittest
  import base64
  import binascii
  import os
  from array import array
  from test.support import os_helper
  from test.support import script_helper
label_desc: Use image node_id 19 for calling the BaseXYTestCase obj's underlying member method code with example usage: obj.test_b16encode() without return types