[check-mysql] Docs about tests
@@ -104,6 +104,23 @@ Checks the number of MySQL connections.
-w, --warning= warning if the number of connection is over (default: 200)
```
-## For more information
+### For more information
Please execute `check-mysql -h` and you can get command line options.
+
+## Test scripts
+
+You can perform basic tests under `test` and `test_56` (for MySQL 5.6) directory.
+
+### Requirements
+
+- docker and docker-compose
+- check-mysql is available in `PATH`
+
+### Usage
+
+```sh
+(cd ..; make build)
+./test/test.sh # MySQL 8
+./test_56/test.sh # MySQL 5.6
+```
