Christian Johansen的工作单位是Shortcut AS，一家专注于开源技术、Web和移动应用程序的软件公司。他原先是一名学生，专业是信息学、数学和数字信号处理。他在职业生涯中的主要从事领域是Web和前端开发，使用的技术包括JavaScript、CSS和HTML。他是一名活跃的开源贡献者，他会在博客中写作有关JavaScript、Ruby和Web开发相关的内容，博客地址是cjohansen.no。

"An essential reference for the social web, present and future… a must-have for making your website known on the social graph.”

-- Joshua Gross, president, Cortex Creations, LLC

For JavaScript developers working on increasingly large and complex projects, effective automated testing is crucial to success. Test-Driven JavaScript Development isa complete, best-practice guide to agile JavaScript testing and quality assurance with the Test-Driven Development (TDD) methodology. Leading agile JavaScript developer Christian Johansen covers all aspects of applying state-of-the-art automated testing in JavaScript environments, walking readers through the entire development lifecycle, from project launch to application deployment, and beyond.

Using real-life examples driven by unit tests, Johansen shows how to use test-driven development (TDD) principles to gain greater confidence in your code base, so you can fearlessly refactor and build more robust, maintainable, and reliable JavaScript code at lower cost. Throughout, he addresses crucial issues ranging from code design to performance optimization, offering realistic solutions for developers, QA specialists, testers, and other software professionals.

Coverage includes

Understanding the concepts of automated tests, TDD, and unit testing

Building effective automated testing workflows

Choosing the right unit testing framework for your needs

Writing more modular and testable code

Testing code for both browsers and servers (using Node.js)

Using TDD to build cleaner APIs, better modularized code, and more robust software

Using test stubs and mocks to test units in isolation

Continuously improving code through refactoring

Walking through the construction and automated testing of fully functional software

Writing superior unit tests