code: def test_uninstall_skipped_when_not_installed(self):
      with fake_pip(None):
          ensurepip._uninstall_helper()
      self.assertFalse(self.run_pip.called)
  
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 1 for calling the TestUninstall obj's underlying member method code with example usage: obj.test_uninstall_skipped_when_not_installed() without return types