code: def test_uninstall_error_code(self):
      with fake_pip():
          self.run_pip.return_value = 2
          exit_code = ensurepip._uninstall._main([])
      self.assertEqual(exit_code, 2)
  
imports: import contextlib
  import os
  import os.path
  import sys
  import tempfile
  import test.support
  import unittest
  import unittest.mock
  import ensurepip
  import ensurepip._uninstall
label_desc: Use image node_id 3 for calling the TestUninstallationMainFunction obj's underlying member method code with example usage: obj.test_uninstall_error_code() without return types