In this final project, you will apply the skills and knowledge you've acquired throughout the course to build a comprehensive test suite using Playwright and TypeScript. This project will simulate a real-world scenario where you need to ensure the quality and reliability of a web application through automated testing.

• Develop a test suite that covers various aspects of a web application, including functionality, performance, and visual consistency.
• Utilize advanced Playwright features and TypeScript techniques to create robust and maintainable tests.

• The test suite should include:
  • Functional tests for key user interactions.
  • Visual regression tests to ensure UI consistency.
  • Performance tests to measure and validate application speed.
  • Tests that demonstrate the use of Playwright's advanced features such as network interception and device emulation.

1. Initialize a New Project

   • Create a new directory for your project.
   • Initialize a new Node.js project using npm init -y.
   • Install Playwright and TypeScript as dependencies:

     npm install playwright typescript
     

2. Configure TypeScript

   • Create a tsconfig.json file with the following configuration:

     {
       "compilerOptions": {
         "target": "ES6",
         "module": "commonjs",
         "strict": true,
         "esModuleInterop": true,
         "skipLibCheck": true,
         "forceConsistentCasingInFileNames": true
       },
       "include": ["src"]
     }
     

3. Set Up Playwright

   • Install Playwright browsers:

     npx playwright install
     

• Create a Test for User Login
  • Write a test script that automates the login process of the application.
  • Use Playwright's selectors to interact with the login form.
  • Example code:

    import { chromium } from 'playwright';
    
    (async () => {
      const browser = await chromium.launch();
      const page = await browser.newPage();
      await page.goto('https://example.com/login');
    
      await page.fill('#username', 'testuser');
      await page.fill('#password', 'password123');
      await page.click('button[type="submit"]');
    
      await page.waitForSelector('#dashboard');
      console.log('Login test passed');
    
      await browser.close();
    })();
    

• Capture and Compare Screenshots
  • Use Playwright's screenshot capabilities to capture the state of the application.
  • Compare screenshots to detect visual changes.
  • Example code:

    import { chromium } from 'playwright';
    
    (async () => {
      const browser = await chromium.launch();
      const page = await browser.newPage();
      await page.goto('https://example.com');
    
      await page.screenshot({ path: 'homepage.png' });
      console.log('Screenshot captured');
    
      await browser.close();
    })();
    

• Measure Page Load Time
  • Use Playwright's performance metrics to evaluate page load times.
  • Example code:

    import { chromium } from 'playwright';
    
    (async () => {
      const browser = await chromium.launch();
      const page = await browser.newPage();
      const start = Date.now();
      await page.goto('https://example.com');
      const loadTime = Date.now() - start;
    
      console.log(`Page loaded in ${loadTime}ms`);
    
      await browser.close();
    })();
    

• Network Interception and Mocking
  • Intercept network requests to simulate different scenarios.
  • Example code:

    import { chromium } from 'playwright';
    
    (async () => {
      const browser = await chromium.launch();
      const page = await browser.newPage();
    
      await page.route('**/api/data', route => {
        route.fulfill({
          status: 200,
          contentType: 'application/json',
          body: JSON.stringify({ data: 'mocked data' })
        });
      });
    
      await page.goto('https://example.com');
      console.log('Network request intercepted and mocked');
    
      await browser.close();
    })();
    

• Organize Your Tests

  • Structure your tests in a logical manner, using directories and naming conventions.
  • Ensure all tests are executable and produce clear output.

• Run the Test Suite

  • Use a test runner like Jest or Mocha to execute your tests.
  • Example command:

    npx jest
    

By completing this project, you have demonstrated your ability to create a comprehensive test suite using Playwright and TypeScript. This project not only reinforces your understanding of the course material but also prepares you for real-world testing scenarios.

• Review your test suite and identify areas for improvement.
• Explore additional Playwright features and TypeScript capabilities to enhance your tests.
• Consider contributing to open-source projects or collaborating with peers to further develop your skills.

Congratulations on completing the course and building a robust test suite!