在编写好测试类后，运行grails test-app 提示出如下错误：
FAILURE: Build failed with an exception.
* What went wrong:
Task 'test' not found in root project 'GDepot'.
Run gradle tasks to get a list of available tasks. Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.
Total time: 0.751 secs
| Tests FAILED Test execution failed