Add a test

.github/workflows/test.yml

@@ -0,0 +1,15 @@
+name: Test
+on:
+  pull_request:
+  push:
+    branches:
+      - master
+      - 'renovate/*'
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    if: github.event_name == 'push' || (github.event_name == 'pull_request' && !startsWith(github.head_ref, 'renovate/'))
+    steps:
+      - uses: actions/checkout@v2
+      - run: yarn
+      - run: yarn test:ci

package.json

@@ -43,6 +43,7 @@
     "scripts": {
         "dev": "gulp",
         "test": "gscan .",
+        "test:ci": "gscan --fatal --verbose .",
         "lint": "gulp lint",
         "zip": "gulp zip"
     },
@@ -50,6 +51,7 @@
         "autoprefixer": "9.8.6",
         "beeper": "2.0.0",
         "cssnano": "4.1.10",
+        "gscan": "^3.6.1",
         "gulp": "4.0.2",
         "gulp-concat": "2.6.1",
         "gulp-livereload": "4.0.2",