One skill that's essential for any professional jаvascript developer is the ability to write testable code. This book shows you what writing and maintaining testable jаvascript for the client- or server-side actually entails, whether you're creating a new application or rewriting legacy code.
From methods to reduce code complexity to unit testing, code coverage, debugging, and automation, you'll learn a holistic approach for writing jаvascript code that you and your colleagues can easily fix and maintain going forward. Testing jаvascript code is complicated. This book helps experienced jаvascript developers simply the process considerably.

Get an overview of Agile, test-driven development, and behavior-driven development

Use patterns from static languages and standards-based jаvascript to reduce code complexity

Learn the advantages of event-based architectures, including modularity, loose coupling, and reusability

Explore tools for writing and running unit tests at the functional and application level

Generate code coverage to measure the scope and effectiveness of your tests

Conduct integration, performance, and load testing, using Selenium or CasperJS

Use tools for in-browser, Node.js, mobile, and production debugging

Understand what, when, and how to automate your development processes