initiate jest

.gitignore

@@ -5,3 +5,4 @@ node_modules
 TODOs.md
 packages/@vuepress/shared-utils/lib/
 types
+**/.vuepress/dist

packages/@vuepress/core/package.json

@@ -34,6 +34,7 @@
     "@vuepress/markdown": "^1.0.0-alpha.46",
     "@vuepress/markdown-loader": "^1.0.0-alpha.46",
     "@vuepress/plugin-last-updated": "^1.0.0-alpha.46",
+    "@vuepress/plugin-public-files": "^1.0.0-alpha.46",
     "@vuepress/plugin-register-components": "^1.0.0-alpha.46",
     "@vuepress/shared-utils": "^1.0.0-alpha.46",
     "autoprefixer": "^7.1.2",

packages/@vuepress/plugin-public-files/__tests__/docs/.vuepress/config.js

@@ -0,0 +1,5 @@
+module.exports = {
+  plugins: [
+    [require('../../..')]
+  ]
+}

packages/@vuepress/plugin-public-files/__tests__/docs/.vuepress/theme/layouts/Layout.vue

@@ -0,0 +1,3 @@
+<template>
+  <Content />
+</template>

packages/@vuepress/plugin-public-files/package.json

@@ -11,6 +11,9 @@
     "url": "git+https://github.com/vuejs/vuepress.git",
     "directory": "packages/@vuepress/plugin-public-files"
   },
+  "scripts": {
+    "jest": "jest .*\\.spec\\.js$"
+  },
   "keywords": [
     "documentation",
     "vue",