Scroll to discover
Leveraging Test-Driven Development (TDD) with Jest
Master Test-Driven Development using Jest framework.
Learn essential TDD cycles, best practices, and advanced patterns with practical examples for writing maintainable JavaScript tests.
Learn essential TDD cycles, best practices, and advanced patterns with practical examples for writing maintainable JavaScript tests.
Leveraging Test-Driven Development (TDD) with Jest
Test-Driven Development has revolutionized how we approach software development. In this guide, we’ll explore how to effectively implement TDD using Jest, one of the most popular testing frameworks in the JavaScript ecosystem.
Understanding TDD Fundamentals
The core TDD cycle consists of three simple steps: Red (write a failing test), Green (make the test pass), and Refactor (improve the code while maintaining functionality).
Getting Started with Jest TDD
First, let’s set up a simple project:
Update your package.json:
Practical TDD Example
Let’s create a simple calculator module using TDD:
Now implement the calculator:
Best Practices for TDD with Jest
- Keep tests focused and atomic
- Use descriptive test names
- Follow the Arrange-Act-Assert pattern
- Maintain test isolation
- Write the minimum code needed to pass tests
Advanced TDD Patterns
Jest Blogs
Versatile testing framework for JavaScript applications supporting various test types.
Mastering Jest Hooks: Before and After Guide Learn how to effectively use Jest's Before and After hooks to write cleaner, more maintainable tests. Discover best practices, common patterns, and avoid pitfalls in test setup and teardown. Organizing Jest Test Files for Large Projects Learn effective strategies for organizing Jest test files in large-scale applications. Discover best practices for directory structure, file naming conventions, and test suite organization. Best Practices for Mocking in Jest Testing Master Jest mocking with essential best practices. Learn how to create reliable test suites through proper mocking techniques, from basic implementations to advanced strategies for better code testing. Structure Tests for App Layers: Best Practices Learn effective strategies for organizing tests across different application layers. Discover how to structure unit, integration, and end-to-end tests for maximum maintainability and reliability. Write Clear Test Names in Jest for Better Code Learn how to write descriptive and meaningful test names in Jest that improve code maintainability, enhance documentation, and make debugging easier for your development team. Learn Jest: JavaScript Testing Made Simple Discover how Jest makes JavaScript testing a breeze with its zero-configuration setup, snapshot testing, and isolated test environments. Start writing better code today.
Talk with CEO
Ready to bring your web/app to life or boost your team with expert Thai developers?
Contact us today to discuss your needs, and let’s create tailored solutions to achieve your goals. We’re here to help at every step!
🖐️ Contact us Explore our best articles, cover a wide variety of technologies
Our knowledge base 219 Articles
Explore ReactJs
Popular JavaScript library for building user interfaces with a component-based architecture.
189 Articles
Explore Flutter
UI toolkit for building natively compiled applications for mobile, web, and desktop from a single codebase.
150 Articles
Explore Nodejs
JavaScript runtime for building scalable, high-performance server-side applications.
80 Articles
Explore Nextjs
React framework enabling server-side rendering and static site generation for optimized performance.
40 Articles
Explore Typescript
Superset of JavaScript adding static types for improved code quality and maintainability.
39 Articles
Explore TailwindCSS
Utility-first CSS framework for rapid UI development.
130 Articles
Explore Golang
Programming language known for its simplicity, concurrency model, and performance.
90 Articles
Explore AstroJs
Astro is an all-in-one web framework. It includes everything you need to create a website, built-in.
40 Articles
Explore Jest
Versatile testing framework for JavaScript applications supporting various test types.
37 Articles
Explore HTML
HTML stands for Hyper Text Markup Language · HTML is the standard markup language for creating Web pages
337 Articles
Explore CSS
CSS3 is the latest version of Cascading Style Sheets, offering advanced styling features like animations, transitions, shadows, gradients, and responsive design.
Let's keep in Touch
Thank you for your interest in Tillitsdone! Whether you have a question about our services, want to discuss a potential project, or simply want to say hello, we're here and ready to assist you.
We'll be right here with you every step of the way.
We'll be right here with you every step of the way.
Contact Information
rick@tillitsdone.com+66824564755
Address
9 Phahonyothin Rd, Khlong Nueng, Khlong Luang District, Pathum Thani, Bangkok Thailand
We anticipate your communication and look forward to discussing how we can contribute to your business's success.
We'll be here, prepared to commence this promising collaboration.
We'll be here, prepared to commence this promising collaboration.
Frequently Asked Questions
Explore frequently asked questions about our products and services.
Whether you're curious about features, warranties, or shopping policies, we provide comprehensive answers to assist you.
Whether you're curious about features, warranties, or shopping policies, we provide comprehensive answers to assist you.