code: def test_uname_replace(self):
      res = platform.uname()
      new = res._replace(
          system="system",
          node="node",
          release="release",
          version="version",
          machine="machine",
      )
      self.assertEqual(new.system, "system")
      self.assertEqual(new.node, "node")
      self.assertEqual(new.release, "release")
      self.assertEqual(new.version, "version")
      self.assertEqual(new.machine, "machine")
      # processor cannot be replaced
      self.assertEqual(new.processor, res.processor)
  
imports: import os
  import copy
  import pickle
  import platform
  import subprocess
  import sys
  import unittest
  from unittest import mock
  from test import support
  from test.support import os_helper
label_desc: Use image node_id 18 for calling the PlatformTest obj's underlying member method code with example usage: obj.test_uname_replace() without return types