feat: add test case

Author: wardseptember

.github/codecov.yml

@@ -5,14 +5,14 @@ comment:
 
 coverage: # https://docs.codecov.com/docs/codecovyml-reference#coverage
   precision: 5
-  range: "70...75"
+  range: "80...100"
   status:
     project:
       default:
         branches:
           - ^master$
-        target: 70.0 # the minimum coverage ratio that the commit must meet to be considered a success.
-        threshold: 1% # allow the coverage to drop by X%, and posting a success status.
+        target: 80.0
+        threshold: 1%
   ignore:
     - "**/test/**"
     - "**/*Test.java"