How to use the tomodachi.watcher.Watcher function in tomodachi

def test_watcher_auto_root() -> None:
    watcher = Watcher()
    assert watcher.root == [os.path.realpath(sys.argv[0].rsplit('/', 1)[0])]

def test_watcher_configurable_ignored_directory() -> None:
    root_path = '{}/tests/watcher_root/configurable_ignored'.format(os.path.realpath(os.getcwd()))
    watcher = Watcher(root=[root_path])
    assert len(watcher.root) == 1
    assert isinstance(watcher.watched_files, dict)
    assert len(watcher.watched_files) == 1

    watcher = Watcher(root=[root_path], configuration={'options': {'watcher': {'ignored_dirs': ['configurable_ignored']}}})
    assert len(watcher.root) == 1
    assert isinstance(watcher.watched_files, dict)
    assert len(watcher.watched_files) == 0

def test_watcher_configurable_ignored_directory() -> None:
    root_path = '{}/tests/watcher_root/configurable_ignored'.format(os.path.realpath(os.getcwd()))
    watcher = Watcher(root=[root_path])
    assert len(watcher.root) == 1
    assert isinstance(watcher.watched_files, dict)
    assert len(watcher.watched_files) == 1

    watcher = Watcher(root=[root_path], configuration={'options': {'watcher': {'ignored_dirs': ['configurable_ignored']}}})
    assert len(watcher.root) == 1
    assert isinstance(watcher.watched_files, dict)
    assert len(watcher.watched_files) == 0

def test_watcher_empty_directory() -> None:
    root_path = '{}/tests/watcher_root/empty'.format(os.path.realpath(os.getcwd()))
    watcher = Watcher(root=[root_path])
    assert len(watcher.root) == 1
    assert isinstance(watcher.watched_files, dict)
    assert len(watcher.watched_files) == 0

def test_watcher_default_ignored_directory() -> None:
    root_path = '{}/tests/watcher_root/__tmp__'.format(os.path.realpath(os.getcwd()))
    watcher = Watcher(root=[root_path])
    assert len(watcher.root) == 1
    assert isinstance(watcher.watched_files, dict)
    assert len(watcher.watched_files) == 0

def test_watcher_callback(loop: Any) -> None:
    root_path = '{}/tests/watcher_root'.format(os.path.realpath(os.getcwd()))
    watcher = Watcher(root=[root_path])
    assert len(watcher.root) == 1
    assert isinstance(watcher.watched_files, dict)
    assert len(watcher.watched_files) == 2

    result = watcher.update_watched_files()
    assert result == {}

    watcher.watched_files = {'_test': 0}
    watcher.watched_files_crc = {'_test': ''}
    result = watcher.update_watched_files(reindex=True)
    assert len(result.get('added', 0)) == 2
    assert len(result.get('removed', 0)) == 1
    assert len(result.get('updated', 0)) == 0

    class Test():
        callbacks_run = {}  # type: Dict[int, bool]

print('Invalid config file: {}'.format(str(e)))
                    sys.exit(2)
                except ValueError as e:
                    print('Invalid config file, invalid JSON format: {}'.format(str(e)))
                    sys.exit(2)

            if '--production' in args:
                index = args.index('--production')
                args.pop(index)
                watcher = None
            else:
                cwd = os.getcwd()
                root_directories = [os.getcwd()]
                for arg in set(args):
                    root_directories.append(os.path.dirname('{}/{}'.format(os.path.realpath(cwd), arg)))
                watcher = Watcher(root=root_directories, configuration=configuration)

            if '-l' in args or '--log' in args:
                index = args.index('-l') if '-l' in args else args.index('--log')
                args.pop(index)
                if len(args) > index:
                    log_level = getattr(logging, args.pop(index).upper(), None) or log_level

            logging.basicConfig(format='%(asctime)s (%(name)s): %(message)s', level=log_level)
            logging.Formatter(fmt='%(asctime)s.%(msecs).03d', datefmt='%Y-%m-%d %H:%M:%S')

            self.test_dependencies()

            ServiceLauncher.run_until_complete(set(args), configuration, watcher)
        sys.exit(0)