'Create dummy files for a version.'

def _create_files_for_version(self, version):

    file_path = version.file_path
    with private_storage.open(file_path, 'w') as f:
        f.write('sample    data\n')
    signed_file_path = version.signed_file_path
    with public_storage.open(signed_file_path, 'w') as f:
        f.write('sample    signed    data\n')
    assert private_storage.exists(file_path)
    assert public_storage.exists(signed_file_path)
    return (file_path, signed_file_path)
