old_contents: import os
  import mock
  import httplib2
  
  from keystoneclient import shell as openstack_shell
  from keystoneclient import exceptions
  from tests import utils
  
  
  class ShellTest(utils.TestCase):
  
      # Patch os.environ to avoid required auth info.
      def setUp(self):
          global _old_env
          fake_env = {
              'KEYSTONE_USERNAME': 'username',
              'KEYSTONE_API_KEY': 'password',
              'KEYSTONE_PROJECT_ID': 'project_id',
              'KEYSTONE_URL': 'http://127.0.0.1:5000',
          }
          _old_env, os.environ = os.environ, fake_env.copy()
  
          # Make a fake shell object, a helping wrapper to call it, and a quick
          # way of asserting that certain API calls were made.
          global shell, _shell, assert_called, assert_called_anytime
          _shell = openstack_shell.OpenStackIdentityShell()
          shell = lambda cmd: _shell.main(cmd.split())
  
      def tearDown(self):
          global _old_env
          os.environ = _old_env
  
      def test_help_unknown_command(self):
          self.assertRaises(exceptions.CommandError, shell, 'help foofoo')
  
      def test_debug(self):
          httplib2.debuglevel = 0
          shell('--debug help')
          assert httplib2.debuglevel == 1
  
new_contents: import os
  import mock
  import httplib2
  
  from keystoneclient import shell as openstack_shell
  from keystoneclient import exceptions
  from tests import utils
  
  
  class ShellTest(utils.TestCase):
  
      # Patch os.environ to avoid required auth info.
      def setUp(self):
          global _old_env
          fake_env = {
              'OS_USERNAME': 'username',
              'OS_PASSWORD': 'password',
              'OS_TENANT_ID': 'tenant_id',
              'OS_AUTH_URL': 'http://127.0.0.1:5000/v2.0',
          }
          _old_env, os.environ = os.environ, fake_env.copy()
  
          # Make a fake shell object, a helping wrapper to call it, and a quick
          # way of asserting that certain API calls were made.
          global shell, _shell, assert_called, assert_called_anytime
          _shell = openstack_shell.OpenStackIdentityShell()
          shell = lambda cmd: _shell.main(cmd.split())
  
      def tearDown(self):
          global _old_env
          os.environ = _old_env
  
      def test_help_unknown_command(self):
          self.assertRaises(exceptions.CommandError, shell, 'help foofoo')
  
      def test_debug(self):
          httplib2.debuglevel = 0
          shell('--debug help')
          assert httplib2.debuglevel == 1
  
subject: update test env shell