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Test-Driving JavaScript Applications: Rapid, Confident, Maintainable Code by Venkat Subramaniam

Test-Driving JavaScript Applications: Rapid, Confident, Maintainable Code

by Venkat Subramaniam
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Book cover type: Paperback
  • ISBN13: 9781680501742
  • Binding: Paperback
  • Subject: N/A
  • Publisher: Pragmatic Bookshelf
  • Publisher Imprint: Pragmatic Bookshelf
  • Publication Date:
  • Pages: 364
  • Original Price: GBP 30.5
  • Language: English
  • Edition: N/A
  • Item Weight: 626 grams
  • BISAC Subject(s): Languages / JavaScript, Software Development & Engineering / Tools, and Software Development & Engineering / Quality Assurance & Testing

Debunk the myth that JavaScript is not easily testable. Whether you use Node.js, Express, MongoDB, jQuery, AngularJS, or directly manipulate the DOM, you can test-drive JavaScript. Learn the craft of writing meaningful, deterministic automated tests with Karma, Mocha, and Chai. Test asynchronous JavaScript, decouple and properly mock out dependencies, measure code coverage, and create lightweight modular designs of both server-side and client-side code. Your investment in writing tests will pay high dividends as you create code that's predictable and cost-effective to change.

Design and code JavaScript applications with automated tests. Writing meaningful tests is a skill that takes learning, some unlearning, and a lot of practice, and with this book, you'll hone that skill. Fire up the editor and get hands-on through practical exercises for effective automated testing and designing maintainable, modular code.

Start by learning when and why to do manual testing vs. automated verification. Focus tests on the important things, like the pre-conditions, the invariants, complex logic, and gnarly edge cases. Then begin to design asynchronous functions using automated tests. Carefully decouple and mock out intricate dependencies such as the DOM, geolocation API, file and database access, and Ajax calls to remote servers.

Step by step, test code that uses Node.js, Express, MongoDB, jQuery, and AngularJS. Know when and how to use tools such as Chai, Istanbul, Karma, Mocha, Protractor, and Sinon. Create tests with minimum effort and run them fast without having to spin up web servers or manually edit HTML pages to run in browsers. Then explore end-to-end testing to ensure all parts are wired and working well together.

Don't just imagine creating testable code, write it.

What You Need:

A computer with a text editor and your favorite browser. The book provides instructions to install the necessary automated testing-related tools.

Subramaniam, Venkat: - Dr. Venkat Subramaniam is an award-winning author, founder of Agile Developer, Inc., and an adjunct faculty at the University of Houston. He has trained and mentored thousands of software developers in the US, Canada, Europe, and Asia, and is a regularly invited speaker at several international conferences. He's the (co)author of multiple books, including the 2007 Jolt Productivity award winning book "Practices of an Agile Developer."

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