Nextjs Testing Playwright Creating your first Playwright end-to-end test

Add a test to verify that your navigation is working correctly:

// e2e/example.spec.ts

import { test, expect } from '@playwright/test'

test('should navigate to the about page', async ({ page }) => {
  // Start from the index page (the baseURL is set via the webServer in the playwright.config.ts)
  await page.goto('http://localhost:3000/')
  // Find an element with the text 'About Page' and click on it
  await page.click('text=About Page')
  // The new url should be "/about" (baseURL is used there)
  await expect(page).toHaveURL('http://localhost:3000/about')
  // The new page should contain an h1 with "About Page"
  await expect(page.locator('h1')).toContainText('About Page')
})

Add a test to verify that your navigation is working correctly:

// e2e/example.spec.ts

import { test, expect } from '@playwright/test'

test('should navigate to the about page', async ({ page }) => {
  // Start from the index page (the baseURL is set via the webServer in the playwright.config.ts)
  await page.goto('http://localhost:3000/')
  // Find an element with the text 'About Page' and click on it
  await page.click('text=About Page')
  // The new url should be "/about" (baseURL is used there)
  await expect(page).toHaveURL('http://localhost:3000/about')
  // The new page should contain an h1 with "About Page"
  await expect(page.locator('h1')).toContainText('About Page')
})

Nextjs Testing Cypress Creating your first Cypress integration test

Add a test to check your navigation is working correctly:

// cypress/integration/app.spec.js

describe('Navigation', () => {
  it('should navigate to the about page', () => {
    // Start from the index page
    cy.visit('http://localhost:3000/')

    // Find a link with an href attribute containing "about" and click it
    cy.get('a[href*="about"]').click()

    // The new url should include "/about"
    cy.url().should('include', '/about')

    // The new page should contain an h1 with "About page"
    cy.get('h1').contains('About Page')
  })
})

Nextjs Testing Cypress Creating your first Cypress integration test

Assuming the following two Next.js pages:

// pages/index.js
import Link from 'next/link'

export default function Home() {
  return (
    <nav>
      <Link href="/about">
        <a>About</a>
      </Link>
    </nav>
  )
}

Nextjs Testing Cypress Creating your first Cypress integration test

// pages/about.js
export default function About() {
  return (
    <div>
      <h1>About Page</h1>
    </div>
  )
}

Nextjs Testing Playwright Quickstart

The fastest way to get started, is to use create-next-app with the with-playwright example. This will create a Next.js project complete with Playwright all set up.

npx create-next-app@latest --example with-playwright with-playwright-app

Nextjs Testing Playwright Manual setup

To manually get started with Playwright, install the @playwright/test package:

npm install --save-dev @playwright/test

Nextjs Testing Playwright Manual setup

Add Playwright to the package.json scripts field:

"scripts": {
  "dev": "next dev",
  "build": "next build",
  "start": "next start",
  "test:e2e": "playwright test",
}

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Test this out by checking that the object can be used to find documents from the collection:

cities.find()

Nextjs Testing Jest and React Testing Library Setting up Jest (with the Rust Compiler)

Create a jest.config.js file in your project's root directory and add the following:

// jest.config.js
const nextJest = require('next/jest')

const createJestConfig = nextJest({
  // Provide the path to your Next.js app to load next.config.js and .env files in your test environment
  dir: './',
})

// Add any custom config to be passed to Jest
const customJestConfig = {
  // Add more setup options before each test is run
  // setupFilesAfterEnv: ['<rootDir>/jest.setup.js'],
  // if using TypeScript with a baseUrl set to the root directory then you need the below for alias' to work
  moduleDirectories: ['node_modules', '<rootDir>/'],
  testEnvironment: 'jest-environment-jsdom',
}

// createJestConfig is exported this way to ensure that next/jest can load the Next.js config which is async
module.exports = createJestConfig(customJestConfig)

Nextjs Testing Jest and React Testing Library Creating your tests:

Optionally, add a snapshot test to keep track of any unexpected changes to your component:

// __tests__/snapshot.js

import { render } from '@testing-library/react'
import Home from '../pages/index'

it('renders homepage unchanged', () => {
  const { container } = render(<Home />)
  expect(container).toMatchSnapshot()
})

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