cache_file_model.dart

  test('Cache Model In File', () async {
    final model = ItemModel(id: 1345);
    final directory = await getApplicationDocumentsDirectory();
    await Directory('${directory.path}').create();
    await Directory('${directory.path}/vb2').create();
    final path = '${directory.path}/vb2/${model.title}.jso';
    final file = File(path);
    final fileWithData = await file.writeAsString(model.toString());
    expect(await fileWithData.exists(), true);
  });