command = core.Command()

        stdout = StringIO()

        command.stdout = stdout

        command.print_help()

        output = stdout.getvalue()

        stdout.close()

        self.assertTrue('Usage:' in output)

        self.assertTrue('Options:' in output)

    def test_run_with_no_args_prints_help(self):

        command = core.Command()

        with patch.object(command, 'print_help') as print_help:

            print_help.assert_called_once_with()

    def test_run_with_single_help_arg_prints_help(self):

        command = core.Command()

        with patch.object(command, 'print_help') as print_help:

            command.run('help')

            print_help.assert_called_once_with()

    def test_run_with_help_and_unknown_subcommand_args_prints_help(self):

        command = core.Command()

        with patch.object(command, 'print_help') as print_help:

            command.run('help', 'invalid-subcommand-name')

            print_help.assert_called_once_with()

    def test_run_with_help_and_subcommand_args_prints_subcommand_help(self):

        command = core.Command()

        fake = command.subcommands['fake'] = Mock()

        command.run('help', 'fake')

        fake.return_value.parser.print_help.assert_called_once_with()

    def test_run_with_unknown_subcommand_arg_prints_help(self):

        command = core.Command()

        with patch.object(command, 'print_help') as print_help:

            print_help.assert_called_once_with()

    def test_stdout_may_be_redirected(self):

        class Fake(core.Subcommand):

            def run(self, args):

                self.stdout.write("standard output stuff")

                self.stdout.flush()

        command = core.Command()

        fake = command.subcommands['fake'] = Fake

        tempdir = tempfile.mkdtemp()

        config_path = os.path.join(tempdir, 'test.ini')

        with open(config_path, 'wt') as f: