coding

package.json

@@ -68,6 +68,7 @@
     "file-loader": "1.1.5",
     "friendly-errors-webpack-plugin": "1.6.1",
     "html-webpack-plugin": "2.30.1",
+    "jest": "^22.2.2",
     "node-notifier": "5.1.2",
     "node-sass": "^4.7.2",
     "optimize-css-assets-webpack-plugin": "3.2.0",