Hey @KevinJin,
Sorry for the late reply. I had a quick look at the code, and it looks to me like the issues in your test code are not properly identified with a // Noncompiliant comment on the same line.
enum Country { // Noncompliant
...
With comments on the problematic lines, the testing harness can verify if issues are raised at the right location (beware of this when reformatting the file).
I hope this helps.