update testing-express example

Author: AmanVarshney01

orm/testing-express/.env.example

@@ -0,0 +1 @@
+DATABASE_URL="postgresql://USER:PASSWORD@HOST:PORT/DATABASE"

orm/testing-express/jest.config.js

@@ -1,12 +1,19 @@
-const path = require('path')
-const { defaults } = require('jest-config')
+import { fileURLToPath } from 'node:url'
+import { dirname, join } from 'node:path'
+
+const __filename = fileURLToPath(import.meta.url)
+const __dirname = dirname(__filename)
 
 /** @type {import('@jest/types').Config.InitialOptions} */
 const config = {
-  preset: 'ts-jest',
-  moduleFileExtensions: [...defaults.moduleFileExtensions, 'mjs'],
-  testEnvironment: path.join(__dirname, 'prisma', 'prisma-test-environment.mjs'),
+  preset: 'ts-jest/presets/default-esm',
+  moduleFileExtensions: ['js', 'json', 'ts', 'mjs'],
+  testEnvironment: join(__dirname, 'prisma', 'prisma-test-environment.mjs'),
   setupFilesAfterEnv: ['<rootDir>/setupTests.ts'],
+  extensionsToTreatAsEsm: ['.ts'],
+  moduleNameMapper: {
+    '^(\\.{1,2}/.*)\\.js$': '$1',
+  },
 }
 
-module.exports = config
+export default config

orm/testing-express/package.json

@@ -2,9 +2,10 @@
   "name": "testing-express",
   "version": "1.0.0",
   "license": "MIT",
+  "type": "module",
   "scripts": {
     "dev": "tsx src/index.ts",
-    "test": "jest --detectOpenHandles"
+    "test": "NODE_OPTIONS=--experimental-vm-modules jest --detectOpenHandles"
   },
   "prettier": {
     "semi": false,
@@ -14,7 +15,7 @@
     "@prisma/client": "^6.17.1",
     "@prisma/extension-accelerate": "^2.0.2",
     "@types/node": "22.15.32",
-    "dotenv": "^16.4.7",
+    "dotenv": "^16.6.1",
     "express": "5.1.0",
     "jest-config": "29.7.0"
   },

orm/testing-express/prisma/prisma-test-environment.mjs

@@ -4,7 +4,11 @@ import fs from 'fs'
 import { nanoid } from 'nanoid'
 import { TestEnvironment } from 'jest-environment-node'
 import { exec } from 'child_process'
+import { promisify } from 'util'
 import { fileURLToPath } from 'url'
+import "dotenv/config"
+
+const execAsync = promisify(exec)
 
 // fix for 'How to fix "__dirname is not defined in ES module scope"'
 const __filename = fileURLToPath(import.meta.url);
@@ -24,20 +28,22 @@ class PrismaTestEnvironment extends TestEnvironment {
   constructor(config, _context) {
     super(config, _context)
 
-    // Generate a unique sqlite identifier for this test context
+    // Generate a unique database file for this test context
     this.dbName = `test_${nanoid()}.db`
-    process.env.DB_URL = `file:${this.dbName}`
-    this.global.process.env.DB_URL = `file:${this.dbName}`
+    const dbUrl = `file:${this.dbName}`
+    process.env.DATABASE_URL = dbUrl
+    this.global.process.env.DATABASE_URL = dbUrl
     this.dbPath = path.join(__dirname, this.dbName)
   }
 
   async setup() {
     // Run the migrations to ensure our schema has the required structure
-    await exec(`${prismaBinary} db push  `)
+    await execAsync(`${prismaBinary} db push --skip-generate`)
     return super.setup()
   }
 
   async teardown() {
+    // Clean up the test database file
     try {
       await fs.promises.unlink(this.dbPath)
     } catch (error) {

orm/testing-express/prisma/schema.prisma

@@ -1,16 +1,15 @@
 generator client {
-  provider   = "prisma-client"
-  output     = "./generated"
-  engineType = "client"
+  provider = "prisma-client-js"
+  output   = "./generated"
 }
 
 datasource db {
-  provider = "postgresql"
+  provider = "sqlite"
   url      = env("DATABASE_URL")
 }
 
 model User {
-  id    Int     @default(autoincrement()) @id
+  id    Int     @id @default(autoincrement())
   name  String?
   email String  @unique
 }

orm/testing-express/setupTests.ts

@@ -1 +1,3 @@
+import { jest } from '@jest/globals'
+
 jest.setTimeout(10000)

orm/testing-express/src/app.ts

@@ -1,9 +1,8 @@
 import 'dotenv/config'
-import { PrismaClient } from '../prisma/generated/client'
-import { withAccelerate } from '@prisma/extension-accelerate'
+import { PrismaClient } from '../prisma/generated/client.js'
 import express from 'express'
 
-export const prisma = new PrismaClient().$extends(withAccelerate())
+export const prisma = new PrismaClient()
 export const app = express()
 
 app.use(express.json())

orm/testing-express/src/index.ts

@@ -1,4 +1,4 @@
-import { app } from './app'
+import { app } from './app.js'
 
 app.listen(3000, () =>
   console.log(`

orm/testing-express/tests/user.test.ts

@@ -1,5 +1,11 @@
+import { test, expect, afterAll, beforeEach } from '@jest/globals'
 import request from 'supertest'
-import { app, prisma } from '../src/app'
+import { app, prisma } from '../src/app.js'
+
+beforeEach(async () => {
+  // Clean up the database before each test
+  await prisma.user.deleteMany()
+})
 
 afterAll(async () => {
   await prisma.$disconnect()
@@ -19,23 +25,53 @@ test('a user is added successfully', async () => {
     .expect(200)
 
   expect(response.body.id).toBeDefined()
+  expect(response.body.name).toBe(user.name)
+  expect(response.body.email).toBe(user.email)
 }, 60000)
 
-test('a user with the same email is rejected', () => {
-  return request(app)
+test('a user with the same email is rejected', async () => {
+  // First, create a user
+  await request(app)
     .post('/user')
     .send(user)
     .set('Accept', 'application/json')
-    .expect('Content-Type', /json/)
-    .expect(409)
+    .expect(200)
+
+  // Then try to create another user with the same email
+  const duplicateResponse = await request(app)
+    .post('/user')
+    .send(user)
+    .set('Accept', 'application/json')
+
+  expect(duplicateResponse.status).toBe(409)
+  expect(duplicateResponse.body.error).toBe('User already exists!')
 }, 60000)
 
 test('correct list of users returned', async () => {
+  // Create multiple users
+  const users = [
+    { name: 'user 1', email: '[email protected]' },
+    { name: 'user 2', email: '[email protected]' },
+    { name: 'user 3', email: '[email protected]' }
+  ]
+
+  for (const userData of users) {
+    await request(app)
+      .post('/user')
+      .send(userData)
+      .set('Accept', 'application/json')
+      .expect(200)
+  }
+
+  // Get all users
   const response = await request(app)
     .get('/user')
     .expect('Content-Type', /json/)
     .expect(200)
 
   expect(response.body).toBeDefined()
-  expect(response.body.length).toBeGreaterThan(1)
+  expect(response.body.length).toBe(3)
+  expect(response.body[0].email).toBeDefined()
+  expect(response.body[1].email).toBeDefined()
+  expect(response.body[2].email).toBeDefined()
 }, 60000)

orm/testing-express/tsconfig.json

@@ -3,7 +3,12 @@
     "sourceMap": true,
     "outDir": "dist",
     "strict": true,
-    "lib": ["esnext"],
-    "esModuleInterop": true
+    "lib": [
+      "esnext"
+    ],
+    "esModuleInterop": true,
+    "module": "ESNext",
+    "moduleResolution": "node",
+    "target": "ES2020"
   }
-}
+}