test: add identifier_checker and rule_collector unit test cases

Author: dancing-ui

.github/workflows/go.yml

@@ -86,4 +86,4 @@ jobs:
           go test -race -count=1 ./... -coverprofile=coverage.txt -covermode=atomic
 
       - name: Coverage
-        run: bash <(curl -s https://codecov.io/bash)
+        run: bash <(curl -s https://codecov.io/bash)