Implemented Jest tests

src/__tests__/app.test.ts

@@ -0,0 +1,33 @@
+import { initServer } from '../app.js'
+import request from 'supertest'
+
+const app = initServer()
+
+describe('GET /v1', () => {
+    it('returns status code 200 and api version message', async () => {
+        const res = await request(app)
+            .get('/v1')
+
+        expect(res.statusCode).toEqual(200)
+        expect(res.body).toHaveProperty('message')
+    })
+})
+
+describe('POST /v1/login', () => {
+    it('returns status code 200 and set httpOnly jwt token cookie', async () => {
+        const res = await request(app)
+            .post('/v1/login')
+            .set('Content-Type', 'application/json')
+            .send(JSON.stringify({
+                email: "a@a.com",
+                password: "aaaaaaaaaa"
+            }))
+
+        const jwtRegEx = /^jwt=.*Path=\/.*HttpOnly.*Secure.*SameSite=Strict.*$/
+        const jwtToken = res.get('Set-Cookie')
+            .filter(cookie => cookie.match(jwtRegEx))
+
+        expect(res.statusCode).toEqual(200)
+        expect(jwtToken).not.toBe(undefined)
+    })
+})

src/app.ts

@@ -6,9 +6,6 @@ import cors from 'cors'
 import cookieParser from 'cookie-parser'
 import { getJwtSecret } from './utils/jwt.js'
 
-const app = express()
-const appRouter = express.Router()
-
 const authMiddleware: RequestHandler = (req, res, next) => {
     const token = req.cookies.jwt
     if (token == undefined) {
@@ -30,7 +27,7 @@ const appRouterGet: RequestHandler = (req, res) => {
     res.send({ code: 200, message: "SnippetsManager v1.0" })
 }
 
-function initEnvVariables() {
+function initEnvVariables(): void {
     dotenv.config()
     const varsToCheck = ['API_PORT', 'FRONT_ORIGIN']
 
@@ -44,20 +41,25 @@ function initEnvVariables() {
     })
 }
 
-function startServer(): void {
+export function initServer(): express.Express {
     initEnvVariables()
 
+    const app = express()
+    const appRouter = express.Router()
+
     app.use(cors({ origin: process.env.FRONT_ORIGIN, credentials: true }))
     app.use(cookieParser())
     app.use(express.json())
     app.use(express.urlencoded({ extended: false }))
 
-    appRouter.get('/', authMiddleware, appRouterGet)
+    appRouter.get('/', appRouterGet)
 
     appRouter.use(userRouter)
     app.use('/v1/', appRouter)
 
-    app.listen(process.env.API_PORT, () => console.log(`Listening on port ${process.env.API_PORT}`))
+    return app
 }
 
-startServer()
+export function startServer(app: express.Express): void {
+    app.listen(process.env.API_PORT, () => console.log(`Listening on port ${process.env.API_PORT}`))
+}

src/index.ts

@@ -0,0 +1,4 @@
+import { startServer, initServer } from "./app.js"
+
+const app = initServer()
+startServer(app)

src/routers/user.ts

@@ -1,5 +1,5 @@
 import { PrismaClient, User } from '@prisma/client'
-import express from 'express'
+import express, { RequestHandler } from 'express'
 
 import { z } from 'zod'
 import bcrypt from 'bcrypt'
@@ -29,6 +29,27 @@ async function isUserEmailAlreadyUsed(email: string): Promise<boolean> {
     return user != undefined
 }
 
+async function createUser(email: string, password: string) {
+    await prisma.user.create({
+        data: {
+            email: email,
+            password: password,
+            name: '',
+            picture_path: '',
+            created_at: new Date(),
+            updated_at: new Date()
+        },
+    })
+}
+
+async function getUser(email: string): Promise<User | null> {
+    return await prisma.user.findFirst({
+        where: {
+            email: email
+        }
+    })
+}
+
 function parseLoginData(data: any): LoginData | undefined {
     try {
         const loginData: LoginData = LoginValidator.parse(data)
@@ -38,34 +59,28 @@ function parseLoginData(data: any): LoginData | undefined {
     }
 }
 
-userRouter.post("/login", async (req, res) => {
+const userRouterPostLogin: RequestHandler = async (req, res) => {
     const loginData = parseLoginData(req.body)
     if (loginData === undefined) {
         res.status(400).json({ message: 'Incorrect credentials format.' })
         return;
     }
 
-    const user = await prisma.user.findFirst({
-        where: {
-            email: loginData.email
-        }
-    })
-
+    const user = await getUser(loginData.email)
     if (await isUserValid(user, loginData) === false) {
         res.status(400).json({ message: 'Incorrect credentials.' })
         return;
     }
 
     const jwtToken = jwt.sign({}, getJwtSecret(), { expiresIn: "1h" })
-
     res.cookie('jwt', jwtToken, {
         httpOnly: true,
         secure: true,
         sameSite: 'strict'
     }).json({ message: "Logged in! httpOnly cookie set." })
-})
+}
 
-userRouter.post("/register", async (req, res) => {
+const userRouterPostRegister: RequestHandler = async (req, res) => {
     const loginData = parseLoginData(req.body)
     if (loginData == undefined) {
         res.status(400).json({ message: 'Incorrect credentials format.' })
@@ -79,18 +94,12 @@ userRouter.post("/register", async (req, res) => {
 
     const hashedPassword = await bcrypt.hash(loginData.password, 10)
 
-    await prisma.user.create({
-        data: {
-            email: loginData.email,
-            password: hashedPassword,
-            name: '',
-            picture_path: '',
-            created_at: new Date(),
-            updated_at: new Date()
-        },
-    })
+    createUser(loginData.email, hashedPassword)
 
     res.json({ message: 'User successfully created!' })
-})
+}
+
+userRouter.post("/login", userRouterPostLogin)
+userRouter.post("/register", userRouterPostRegister)
 
 export default userRouter