Install nyc and Coveralls

.github/workflows/linter.yml

@@ -9,6 +9,15 @@ jobs:
     - uses: actions/checkout@v2
     - name: Use Node.js
       uses: actions/setup-node@v2
-    - run: npm install
+    - name: Install Dependencies
+      run: npm install
     - run: npm run eslint
     - run: npm test
+    - name: Coverage
+      run: npm run test-cov
+      env:
+        CI: true
+    - name: Coveralls
+      uses: coverallsapp/github-action@master
+      with:
+        github-token: ${{ secrets.GITHUB_TOKEN }}

.gitignore

@@ -5,3 +5,5 @@
 yarn.lock
 package-lock.json
 node_modules/
+.nyc_output/
+coverage/

package.json

@@ -16,7 +16,8 @@
     "eslint": "eslint scripts/ source/js test/",
     "prepare": "node .githooks/install.js",
     "stylint": "stylint source/css/",
-    "test": "mocha test/index.js"
+    "test": "mocha test/index.js",
+    "test-cov": "nyc --reporter=lcovonly npm run test"
   },
   "repository": "next-theme/hexo-theme-next",
   "keywords": [
@@ -38,6 +39,7 @@
     "hexo-renderer-marked": "4.0.0",
     "js-yaml": "4.0.0",
     "mocha": "8.3.2",
+    "nyc": "15.1.0",
     "stylint": "2.0.0"
   }
 }