Library › Book 13 › Component Testing and Reusable Patterns
Component Testing and Reusable Patterns
11.1🔒Learning ObjectivesBy the end of this chapter, you will be able to:
11.2🔒The Testing Pyramid in Browser AutomationBefore writing any test, ask: "What is the cheapest, fastest, most reliable way to verify this behavior?"
11.3🔒Playwright Component TestingPlaywright can test React, Vue, Svelte, and Solid components in isolation, without a full application:
11.4🔒Test Data FactoriesHardcoded test data is a maintenance problem. When your test creates a user with email: 'test@example.com', every test uses the same data…
11.5🔒API-Driven SetupThe fastest way to get your application into a specific state for testing is through API calls, not UI interactions:
11.6🔒Reusable Test Patternstest.step groups related actions in the test report and trace viewer, making long tests easier to debug.
11.7🔒Exercises1. Set up Playwright component testing for your React/Vue/Svelte project 2. Write component tests for a Button component: rendering, click…
11.8🔒Q&AQuiz1. When should you use component testing vs E2E testing? a) Always use E2E b) Component tests for isolated component behavior; E2E for full…
11.9🔒Key Takeaways- Component testing in Playwright renders components in a real browser, enabling visual and accessibility verification. - Test data…
11.10🔒Career Translation- "Implemented test data factory system with automated cleanup, enabling fully independent parallel test execution" - "Reduced test setup…
11.11🔒Q&AInterview Depth CheckPrompt: "Design a test data strategy for an e-commerce application with users, products, orders, and payments."