如何在Flutter中运行集成测试来解决此问题？

Question

尝试使用此命令进行集成测试时

lutter drive --target=my_app/test_driver/my_test.dart

我总是会收到此错误：

       The flutter tool requires Git in order to operate properly;
       to set up Flutter, run the following command:
       git clone -b stable https://github.com/flutter/flutter.git

当我按照他们所说的运行git clone -b stable https://github.com/flutter/flutter.git时，我总是会收到以下提示：

fatal: destination path 'flutter' already exists and is not an empty directory.
macpros-MBP:flutter_app CompteEtudiant$