Testing JavaScript and Node.js Applications

Moving from basic assertions to real-world application testing can feel overwhelming without a solid foundation. This course bridges that gap by teaching you how to structure, write, and maintain high-quality tests for modern JavaScript environments. You will progress from understanding core terminology to implementing advanced testing patterns like mocking and Test-Driven Development (TDD). By the end of this course, you will be able to verify application logic and user workflows with confidence, ensuring your Node.js and frontend code remains stable as it grows. What you'll learn: - Understand core testing principles, including assertions, test suites, and runners - Write effective unit tests for isolated logic and complex functions - Implement mocking, spying, and stubbing to handle external dependencies and API calls - Develop integration tests to ensure different parts of your application work together - Configure end-to-end (E2E) tests to simulate real user interactions within the browser - Apply Test-Driven Development (TDD) cycles to improve code design and maintainability - Master asynchronous testing patterns for modern Node.js and web environments The course begins with foundational concepts and definitions before moving into practical unit testing exercises. You will then explore advanced integration strategies and end-to-end workflows using industry-standard tools and modern syntax. This course is designed for developers who are comfortable with JavaScript basics and want to learn professional testing practices from scratch. No prior testing experience is required. Start building more resilient JavaScript applications today.