code: def test_b85_padding(self):
      eq = self.assertEqual
  
      eq(base64.b85encode(b"x", pad=True), b"cmMzZ")
      eq(base64.b85encode(b"xx", pad=True), b"cz6H+")
      eq(base64.b85encode(b"xxx", pad=True), b"czAdK")
      eq(base64.b85encode(b"xxxx", pad=True), b"czAet")
      eq(base64.b85encode(b"xxxxx", pad=True), b"czAetcmMzZ")
  
      eq(base64.b85decode(b"cmMzZ"), b"x\x00\x00\x00")
      eq(base64.b85decode(b"cz6H+"), b"xx\x00\x00")
      eq(base64.b85decode(b"czAdK"), b"xxx\x00")
      eq(base64.b85decode(b"czAet"), b"xxxx")
      eq(base64.b85decode(b"czAetcmMzZ"), b"xxxxx\x00\x00\x00")
  
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 26 for calling the BaseXYTestCase obj's underlying member method code with example usage: obj.test_b85_padding() without return types