old_contents: import sys
  import os
  import tempfile
  import unittest
  import shutil
  import copy
  
  CURDIR = os.path.abspath(os.path.dirname(__file__))
  TOPDIR = os.path.split(CURDIR)[0]
  sys.path.insert(0, TOPDIR)
  
  from ez_setup import (use_setuptools, _build_egg, _python_cmd, _do_download,
      _install, DEFAULT_URL, DEFAULT_VERSION)
  import ez_setup
  
  class TestSetup(unittest.TestCase):
  
      def urlopen(self, url):
          return open(self.tarball, 'rb')
  
      def setUp(self):
          self.old_sys_path = copy.copy(sys.path)
          self.cwd = os.getcwd()
          self.tmpdir = tempfile.mkdtemp()
          os.chdir(TOPDIR)
          _python_cmd("setup.py", "-q", "egg_info", "-RDb", "", "sdist",
              "--formats", "zip", "--dist-dir", self.tmpdir)
          zipball = os.listdir(self.tmpdir)[0]
          self.zipball = os.path.join(self.tmpdir, zipball)
          from setuptools.compat import urllib2
          urllib2.urlopen = self.urlopen
  
      def tearDown(self):
          shutil.rmtree(self.tmpdir)
          os.chdir(self.cwd)
          sys.path = copy.copy(self.old_sys_path)
  
      def test_do_download(self):
          tmpdir = tempfile.mkdtemp()
          _do_download(DEFAULT_VERSION, DEFAULT_URL, tmpdir, 1)
          import setuptools
          self.assertTrue(setuptools.bootstrap_install_from.startswith(tmpdir))
  
      def test_install(self):
          def _faked(*args):
              return True
          ez_setup.python_cmd = _faked
          _install(self.zipball)
  
      def test_use_setuptools(self):
          self.assertEqual(use_setuptools(), None)
  
  if __name__ == '__main__':
      unittest.main()
  
new_contents: import sys
  import os
  import tempfile
  import unittest
  import shutil
  import copy
  
  CURDIR = os.path.abspath(os.path.dirname(__file__))
  TOPDIR = os.path.split(CURDIR)[0]
  sys.path.insert(0, TOPDIR)
  
  from ez_setup import (use_setuptools, _python_cmd, _install)
  import ez_setup
  
  class TestSetup(unittest.TestCase):
  
      def urlopen(self, url):
          return open(self.tarball, 'rb')
  
      def setUp(self):
          self.old_sys_path = copy.copy(sys.path)
          self.cwd = os.getcwd()
          self.tmpdir = tempfile.mkdtemp()
          os.chdir(TOPDIR)
          _python_cmd("setup.py", "-q", "egg_info", "-RDb", "", "sdist",
              "--formats", "zip", "--dist-dir", self.tmpdir)
          zipball = os.listdir(self.tmpdir)[0]
          self.zipball = os.path.join(self.tmpdir, zipball)
          from setuptools.compat import urllib2
          urllib2.urlopen = self.urlopen
  
      def tearDown(self):
          shutil.rmtree(self.tmpdir)
          os.chdir(self.cwd)
          sys.path = copy.copy(self.old_sys_path)
  
      def test_install(self):
          def _faked(*args):
              return True
          ez_setup.python_cmd = _faked
          _install(self.zipball)
  
      def test_use_setuptools(self):
          self.assertEqual(use_setuptools(), None)
  
  if __name__ == '__main__':
      unittest.main()
  
subject: Remove test_do_download, which also no longer works due to complexities around secure downloaders.