How to use the mike.commands.delete function in mike

def test_delete_invalid(self):
        self._deploy()
        self.assertRaises(ValueError, commands.delete)
        self.assertRaises(ValueError, commands.delete, ['3.0'])
        self.assertRaises(ValueError, commands.delete, ['1.0'],
                          branch='branch')

def test_branch(self):
        self._deploy('branch')
        commands.delete(['1.0'], branch='branch')
        check_call_silent(['git', 'checkout', 'branch'])
        self._test_delete()

def test_delete_version(self):
        self._deploy()
        commands.delete(['1.0'])
        check_call_silent(['git', 'checkout', 'gh-pages'])
        self._test_delete()

def xtest_delete_all(self):
        self._deploy()
        commands.delete(all=True)
        check_call_silent(['git', 'checkout', 'gh-pages'])

        message = subprocess.check_output(['git', 'log', '-1', '--pretty=%B'],
                                          universal_newlines=True).rstrip()
        self.assertRegex(message, r'^Removed everything with mike \S+$')
        assertDirectory('.', set())

def test_delete_all(self):
        self._deploy()
        commands.delete(all=True)
        check_call_silent(['git', 'checkout', 'gh-pages'])

        message = subprocess.check_output(['git', 'log', '-1', '--pretty=%B'],
                                          universal_newlines=True).rstrip()
        self.assertRegex(message, r'^Removed everything with mike \S+$')
        assertDirectory('.', set())

def test_delete_alias(self):
        self._deploy()
        commands.delete(['stable'])
        check_call_silent(['git', 'checkout', 'gh-pages'])
        self._test_delete(expected_versions=[
            versions.VersionInfo('2.0'),
            versions.VersionInfo('1.0'),
        ])

def test_commit_message(self):
        self._deploy()
        commands.delete(['1.0'], message='commit message')
        check_call_silent(['git', 'checkout', 'gh-pages'])
        self._test_delete('^commit message$')

def delete(args):
    check_remote_status(args, strict=True)
    commands.delete(args.version, args.all, args.branch, args.message)
    if args.push:
        git_utils.push_branch(args.remote, args.branch, args.force)