Next.js 15 Fullstack (App Router + Server Actions) · Pelajaran

Pengujian E2E dengan Playwright/Cypress

Terapkan pengujian menyeluruh menggunakan alat seperti Playwright atau Cypress untuk menyimulasikan interaksi pengguna dan memvalidasi seluruh alur aplikasi.

Pengujian E2E dengan Playwright/Cypress adalah pelajaran Next.js 15 Fullstack (App Router + Server Actions) gratis di CoddyKit. Ini adalah pelajaran 3 dari 4. Kamu bisa membaca pelajaran lengkapnya di bawah secara gratis — lalu praktikkan langsung di browser dengan editor kode bawaan dan tutor AI 24/7. Ini adalah bagian dari jalur belajar Next.js 15 Fullstack (App Router + Server Actions), dan progresmu tersinkronisasi di web dan aplikasi CoddyKit. Kursus Next.js 15 Fullstack (App Router + Server Actions) mencakup 4 pelajaran total.

Bagian dari pelajaran ini belum diterjemahkan dan ditampilkan dalam bahasa Inggris.

What is End-to-End Testing?

End-to-End (E2E) testing simulates a real user's journey through your application, from start to finish. It tests the entire flow, including the UI, database, network requests, and server logic.

Think of it as ensuring all the pieces of your Next.js application work together seamlessly, just like a user would expect.

Why E2E for Next.js?

For Next.js applications, E2E testing is crucial because they often involve complex interactions between client and server components, API routes, and external services.

Verifies Integrations: Checks if different parts (frontend, backend, database) communicate correctly.
User Experience: Ensures critical user flows, like login or checkout, function as intended.
Confidence: Provides high confidence that new features or changes haven't broken existing functionality.

Introducing Playwright

While Cypress is another popular choice, we'll focus on Playwright for E2E testing in Next.js. Playwright is a powerful open-source framework from Microsoft that enables reliable end-to-end testing.

Key features:

Supports all modern browsers (Chromium, Firefox, WebKit).
Fast and reliable test execution.
Auto-waits for elements to be ready.
Rich set of APIs for interacting with web pages.

Setting Up Playwright

Getting Playwright ready in your Next.js project is straightforward. You'll typically run an initialization command that sets up the necessary files and installs browser binaries.

Open your terminal in your Next.js project and run:

npm init playwright@latest

Your First E2E Test

Let's write a basic test to navigate to your application's homepage and verify its title. Playwright tests are written using a test runner similar to Jest.

After setup, you'll find a tests/example.spec.ts file. Modify it:

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

test('homepage has title', async ({ page }) => {
  await page.goto('http://localhost:3000/');
  await expect(page).toHaveTitle(/Next.js App/);
});

Interacting with UI Elements

Playwright allows you to simulate user actions like clicking buttons or typing into input fields. You select elements using CSS selectors, text content, or specific roles.

Here's how to fill an input and click a button:

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

test('user can interact with elements', async ({ page }) => {
  await page.goto('http://localhost:3000/contact'); // Assume a contact page
  await page.fill('input[name="name"]', 'Coddy Kit');
  await page.click('button[type="submit"]');
  // After clicking, we might expect a success message to appear
  await expect(page.locator('.success-message')).toBeVisible();
});

Assertions and Visibility

Assertions are key to E2E tests, verifying that your application behaves as expected. Playwright's expect provides many matchers to check element properties, text, and visibility.

Let's verify text content and visibility:

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

test('elements display correct text', async ({ page }) => {
  await page.goto('http://localhost:3000/about');
  const heading = page.locator('h1');
  await expect(heading).toHaveText('About Us');
  const paragraph = page.locator('p');
  await expect(paragraph).toContainText('Our mission');
});

Testing Form Submissions

E2E tests are perfect for validating entire form submission flows, ensuring data is sent to the server, processed, and the UI updates correctly. This covers both client-side and server-side logic.

Consider a contact form:

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

test('submit contact form successfully', async ({ page }) => {
  await page.goto('http://localhost:3000/contact');
  await page.fill('input[name="email"]', 'test@example.com');
  await page.fill('textarea[name="message"]', 'Hello CoddyKit!');
  await page.click('button[type="submit"]');
  await expect(page.locator('.form-status')).toHaveText('Message sent!');
});

Running Your Tests

Once your tests are written, you can easily run them from the command line. Playwright offers various options, like running tests in headless mode (without opening a browser) or with a UI for debugging.

To run all tests:

npx playwright test

E2E Best Practices

Writing effective E2E tests requires careful planning to make them robust and maintainable. Which of these are good practices?

Recap: E2E Testing

Congratulations! You've explored End-to-End testing for Next.js applications using Playwright.

E2E tests simulate real user journeys.
Playwright is a powerful tool for cross-browser E2E testing.
You learned to set up Playwright, write tests for navigation, user interaction, and form submissions.
Remember to follow best practices for robust and maintainable E2E tests.

Pertanyaan yang Sering Diajukan

Apakah pelajaran “Pengujian E2E dengan Playwright/Cypress” gratis?

Ya — teks lengkap “Pengujian E2E dengan Playwright/Cypress” gratis dibaca di sini di web. Untuk praktiknya secara interaktif (editor kode bawaan dan tutor AI 24/7) dan buka sisa kursus Next.js 15 Fullstack (App Router + Server Actions), upgrade ke CoddyKit PRO. Kursus Next.js 15 Fullstack (App Router + Server Actions) mencakup 4 pelajaran total.

Apa yang akan aku pelajari di “Pengujian E2E dengan Playwright/Cypress”?

Terapkan pengujian menyeluruh menggunakan alat seperti Playwright atau Cypress untuk menyimulasikan interaksi pengguna dan memvalidasi seluruh alur aplikasi. Kamu berlatih Next.js 15 Fullstack (App Router + Server Actions) dengan kode praktik yang langsung kamu jalankan di browser, dan tutor AI 24/7 menjawab pertanyaanmu saat kamu mengerjakan pelajaran ini.

Apakah aku perlu pengalaman untuk memulai Next.js 15 Fullstack (App Router + Server Actions)?

Tidak diperlukan pengalaman sebelumnya. Next.js 15 Fullstack (App Router + Server Actions) di CoddyKit dirancang untuk pemula hingga pelajar tingkat lanjut, jadi kamu bisa memulai di sini atau dari awal dan belajar sesuai kecepatan kamu sendiri. Ini adalah pelajaran 3 dari 4.

Berapa lama pelajaran “Pengujian E2E dengan Playwright/Cypress” memakan waktu?

Sebagian besar pelajaran CoddyKit memakan waktu sekitar 5–10 menit. Setiap pelajaran ringkas dan interaktif, jadi kamu membuat kemajuan stabil dan melanjutkan dari tempat kamu tinggalkan di web dan aplikasi.

Bisakah aku menulis dan menjalankan kode dalam pelajaran Next.js 15 Fullstack (App Router + Server Actions) ini?

Ya. Setiap pelajaran Next.js 15 Fullstack (App Router + Server Actions) menyertakan editor kode bawaan, jadi kamu menulis dan menjalankan kode nyata langsung di browser dan mendapatkan umpan balik AI instan — tidak diperlukan penyiapan lokal.

Semua pelajaran dalam kursus ini

← Kembali ke Next.js 15 Fullstack (App Router + Server Actions)