Lint and test addons on CI (#9936)

* Lint addons

* Run prettier on addons

* Fix all lint issues

* Remove unused variable

* Test addons on CI

scripts/circleci/test_entry_point.sh

@@ -28,6 +28,7 @@ if [ $((0 % CIRCLE_NODE_TOTAL)) -eq "$CIRCLE_NODE_INDEX" ]; then
   COMMANDS_TO_RUN+=('./node_modules/.bin/grunt build')
   COMMANDS_TO_RUN+=('./scripts/circleci/test_extract_errors.sh')
   COMMANDS_TO_RUN+=('./scripts/circleci/track_stats.sh')
+  COMMANDS_TO_RUN+=('node ./addons/test')
 fi
 
 RETURN_CODES=()

scripts/prettier/index.js

@@ -34,6 +34,12 @@ const config = {
       '**/node_modules/**',
     ],
   },
+  addons: {
+    patterns: ['addons/**/*.js'],
+    ignore: [
+      '**/node_modules/**',
+    ],
+  },
 };
 
 function exec(command, args) {