run npm lint when open PR (#6375)

* 01 fix code warnings

* 02 change test.yml

tests/github_actions_npm_lint.sh

@@ -0,0 +1,26 @@
+#!/bin/bash
+
+set -e
+set -x
+
+if test $GITHUB_EVENT_NAME = "pull_request"; then
+    branch=$GITHUB_HEAD_REF
+else
+    branch=${GITHUB_REF##*/}
+fi
+
+export GITHUB_BRANCH=$branch
+
+echo "GITHUB_BRANCH: $GITHUB_BRANCH"
+
+export PYTHONPATH="${PYTHONPATH}:/tmp/site-packages"
+
+echo "PYTHONPATH: $PYTHONPATH"
+
+echo "//registry.npmjs.org/:_authToken=$NPM_TOKEN" >~/.npmrc
+
+cd $GITHUB_WORKSPACE
+
+echo "npm run lint on frontend/src files..."
+
+cd ./frontend && npm install && npm run lint