Refactor

index.js

@@ -0,0 +1,6 @@
+const app = require('./src/app')
+const port = process.env.PORT || 3000
+
+app.listen(port, () => {
+  console.log('JSONPlaceholder listening on http://localhost:' + port)
+})

src/app.js

@@ -14,6 +14,7 @@ app.use((req, res, next) => {
 app.use(jsonServer.defaults({
   logger: process.env.NODE_ENV !== 'production'
 }))
+
 app.use(router)
 
 module.exports = app

test/app.js

@@ -0,0 +1,26 @@
+const test = require('tape')
+const request = require('supertest')
+const app = require('../src/app')
+
+test('GET /', (t) => {
+  request(app)
+    .get('/')
+    .expect(200, (err) => t.end(err))
+})
+
+test('POST /', (t) => {
+  request(app)
+    .post('/posts')
+    .send({ body: 'foo' })
+    .expect(201, (err) => {
+      t.error(err)
+      // Check that GET /posts length still returns 100 items
+      request(app)
+        .get('/posts')
+        .expect(200, (err, res) => {
+          t.error(err)
+          t.equal(res.body.length, 100, 'more than 100 posts found')
+          t.end()
+        })
+    })
+})