Write tests that give you confidence. Learn unit testing, integration testing, E2E testing, and best practices for reliable applications.
Testing Tutorial
Learn how to write effective tests for web applications. Master the testing pyramid, write unit tests, integration tests, and E2E tests, and build confidence in your code.
Testing Fundamentals
Understanding why we test, types of testing, and building a testing mindset
The Testing Pyramid
Understanding the optimal balance of unit, integration, and E2E tests
Unit Testing Deep Dive
Master unit testing with Jest: mocking, spies, test organization, and best practices
Integration Testing
Test how components work together: API integration, database testing, and component interactions
End-to-End Testing
Test complete user workflows with Playwright and Cypress: browser automation, user interactions, and real-world scenarios
Testing Best Practices
Real-world testing strategies, common patterns, debugging techniques, and building maintainable test suites
Why Testing Matters
Confidence
Refactor and add features without fear of breaking existing functionality.
Catch Bugs Early
Find and fix issues before they reach production and affect users.
Documentation
Tests serve as living documentation showing how your code should work.
What You'll Learn
- ✓Testing Fundamentals: Why we test, types of testing, and testing mindset
- ✓The Testing Pyramid: Balancing unit, integration, and E2E tests for optimal coverage
- ✓Unit Testing: Jest, mocking, spies, and testing isolated functions
- ✓Integration Testing: Testing components working together, API integration, and databases
- ✓E2E Testing: Playwright and Cypress for complete user workflow testing
- ✓Best Practices: Writing maintainable tests, debugging, and CI/CD integration