Export a function in server.js and test teardown

src/graphql-schema.test.js

@@ -1,5 +1,20 @@
 import { request } from 'graphql-request'
-import server from './server'
+import createServer from './server'
+
+let getHost
+let app
+let port
+
+beforeEach(async () => {
+  const server = createServer()
+  app = await server.start({ port: 0 })
+  port = app.address().port
+  getHost = () => `http://127.0.0.1:${port}`
+})
+
+afterEach(async () => {
+  await app.close()
+})
 
 describe('login', () => {
   describe('asking for a `token`', () => {
@@ -15,14 +30,6 @@ describe('login', () => {
     })
 
     describe('with a non-existing email', () => {
-      let getHost
-
-      beforeEach(async () => {
-        const app = await server.start({ port: 0 })
-        const { port } = app.address()
-        getHost = () => `http://127.0.0.1:${port}`
-      })
-
       const mutation = `
       mutation {
         login(email:"user@example.com", password:"asdfasd"){

src/index.js

@@ -1,4 +1,4 @@
-import server from './server'
+import createServer from './server'
 
 const serverConfig = {
   port: process.env.GRAPHQL_PORT || 4000
@@ -8,6 +8,7 @@ const serverConfig = {
   // }
 }
 
+const server = createServer()
 server.start(serverConfig, options => {
   /* eslint-disable-next-line no-console */
   console.log(`Server ready at ${process.env.GRAPHQL_URI} 🚀`)

src/server.js

@@ -22,10 +22,6 @@ let schema = makeExecutableSchema({
 
 const driver = neo4j().getDriver()
 
-const MOCK = (process.env.MOCK === 'true')
-/* eslint-disable-next-line no-console */
-console.log('MOCK:', MOCK)
-
 schema = augmentSchema(schema, {
   query: {
     exclude: ['Statistics', 'LoggedInUser']
@@ -36,7 +32,8 @@ schema = augmentSchema(schema, {
 })
 schema = applyScalars(applyDirectives(schema))
 
-const server = new GraphQLServer({
+const createServer = (options) => {
+  const defaults = {
     context: async (req) => {
       const payload = {
         driver,
@@ -55,12 +52,15 @@ const server = new GraphQLServer({
     schema: schema,
     tracing: true,
     middlewares: middleware(schema),
-  mocks: MOCK ? mocks : false
+    mocks: (process.env.MOCK === 'true') ? mocks : false
-})
+  }
+  const server = new GraphQLServer(Object.assign({}, defaults, options))
 
-passport.use('jwt', jwtStrategy())
+  passport.use('jwt', jwtStrategy())
-server.express.use(passport.initialize())
+  server.express.use(passport.initialize())
 
-server.express.post('/graphql', passport.authenticate(['jwt'], { session: false }))
+  server.express.post('/graphql', passport.authenticate(['jwt'], { session: false }))
+  return server
+}
 
-export default server
+export default createServer