def METHOD_NAME(fs_storage):
    f, __ = fs_storage.save('test.txt', 'unused/unused', 'unused', b'hello world')
    with fs_storage.get_local_path(f) as path:
        assert path == fs_storage._resolve_path(f)
        with open(path, 'rb') as fd:
            assert fd.read() == b'hello world'
    # fs storage returns the real path so it should still exist afterwards
    assert os.path.exists(path)