def prepare_share(cls, share_name: str, azure_fileshare_conn_id: str, file_name: str, directory: str):
        """
        Create share with a file in given directory. If directory is None, file is in root dir.
        """
        cls.create_share(share_name=share_name, azure_fileshare_conn_id=azure_fileshare_conn_id)
        cls.create_directory(
            share_name=share_name, azure_fileshare_conn_id=azure_fileshare_conn_id, directory=directory
        )
        string_data = "".join(random.choice(string.ascii_letters) for _ in range(1024))
        cls.upload_file_from_string(
            string_data=string_data,
            share_name=share_name,
            azure_fileshare_conn_id=azure_fileshare_conn_id,
            file_name=file_name,
            directory=directory,
        )