basic tests for express middleware

package.json

@@ -139,6 +139,7 @@
     "eslint-plugin-node": "^5.1.1",
     "eslint-plugin-promise": "^3.5.0",
     "eslint-plugin-standard": "^3.0.1",
+    "express": "^4.15.3",
     "finalhandler": "^1.0.3",
     "jsdom": "^11.1.0",
     "json-loader": "^0.5.6",

test/express.test.js

@@ -0,0 +1,41 @@
+import test from 'ava'
+import { resolve } from 'path'
+import { Nuxt, Builder } from '../index.js'
+import express from 'express'
+import rp from 'request-promise-native'
+
+const port = 4000
+const url = (route) => 'http://localhost:' + port + route
+
+let nuxt
+let app
+
+// Init nuxt.js and create express server
+test.before('Init Nuxt.js', async t => {
+  const options = {
+    rootDir: resolve(__dirname, 'fixtures/basic'),
+    dev: false,
+    runBuild: true
+  }
+
+  // Create nuxt instace
+  nuxt = new Nuxt(options)
+
+  // Build
+  await new Builder(nuxt).build()
+
+  // Create express app
+  app = express()
+
+  // Register nuxt
+  app.use(nuxt.render)
+
+  // Start listening on localhost:4000
+  app.listen(port)
+})
+
+test('/stateless with express', async t => {
+  const html = await rp(url('/stateless'))
+
+  t.true(html.includes('<h1>My component!</h1>'))
+})

yarn.lock

@@ -2588,7 +2588,7 @@ expand-range@^1.8.1:
   dependencies:
     fill-range "^2.1.0"
 
-express@^4.15.2:
+express@^4.15.2, express@^4.15.3:
   version "4.15.3"
   resolved "https://registry.yarnpkg.com/express/-/express-4.15.3.tgz#bab65d0f03aa80c358408972fc700f916944b662"
   dependencies: