Book Image

Test-Driven JavaScript Development

By : Ravi Kumar Gupta
Book Image

Test-Driven JavaScript Development

By: Ravi Kumar Gupta

Overview of this book

Initially, all processing used to happen on the server-side and simple output was the response to web browsers. Nowadays, there are so many JavaScript frameworks and libraries created that help readers to create charts, animations, simulations, and so on. By the time a project finishes or reaches a stable state, so much JavaScript code has already been written that changing and maintaining it further is tedious. Here comes the importance of automated testing and more specifically, developing all that code in a test-driven environment. Test-driven development is a methodology that makes testing the central part of the design process – before writing code developers decide upon the conditions that code must meet to pass a test. The end goal is to help the readers understand the importance and process of using TDD as a part of development. This book starts with the details about test-driven development, its importance, need, and benefits. Later the book introduces popular tools and frameworks like YUI, Karma, QUnit, DalekJS, JsUnit and goes on to utilize Jasmine, Mocha, Karma for advanced concepts like feature detection, server-side testing, and patterns. We are going to understand, write, and run tests, and further debug our programs. The book concludes with best practices in JavaScript testing. By the end of the book, the readers will know why they should test, how to do it most efficiently, and will have a number of versatile tests (and methods for devising new tests) to get to work immediately.

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Test-Driven JavaScript Development
Ravi Kumar Gupta
Dec, 2015 | 240 pages
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Table of Contents (16 chapters)
Test-Driven JavaScript Development
Test-Driven JavaScript Development
Credits
Credits
About the Authors
About the Authors
About the Reviewers
About the Reviewers
www.PacktPub.com
www.PacktPub.com
Preface
Preface
Free Chapter
1
Overview of TDD
Overview of TDD
Complexity of web pages
Understanding test-driven development
Agile and TDD
Benefits of TDD and common myths
Summary
2
Testing Concepts
Testing Concepts
Unit testing
Benefits and pitfalls
Summary
3
Testing Tools
Testing Tools
JsUnit
QUnit
Karma with Jasmine
DalekJS
Summary
4
Jasmine
Jasmine
Understanding behavior-driven development
Setting up Jasmine
describe and specs
Expectations
Matchers
Set up and tear down
Spies
Jasmine clock
Creating a custom matcher
Creating a custom equality tester
Nesting suites
Summary
5
JsTestDriver
JsTestDriver
JsTestDriver
Setting up JsTestDriver with IDE
Code coverage
Summary
6
Feature Detection
Feature Detection
Understanding feature detection
has.js
Modernizr
Browser detection
Features testing with Modernizr
Modernizr methods
Undetectable features
Summary
7
Observer Design Pattern
Observer Design Pattern
Overview
When to use it
Advantages
Disadvantages
Different implementations of the observer
Observer with topics
Observer pattern using jQuery.Callbacks
Implementing the observer pattern using TDD
Summary
8
Testing with Server-Side JS
Testing with Server-Side JS
Setting up the environment
Server-side unit testing
Summary
9
Best Practices
Best Practices
TDD best practices
Follow proper rules to define test cases
Applying proper processes
Follow right development practices
Choosing the right tool
Summary
Index
Index

About the Authors

Ravi Kumar Gupta is an open source software evangelist and Liferay expert. He pursued M.S. degree in software system from BITS Pilani and B.Tech from LNMIIT, Jaipur. His technological forte is portal management and development using Liferay along with popular JavaScript libraries.

He is currently working as a lead consultant with CIGNEX Datamatics. He was a core member of the open source group at TCS, where he started working on Liferay and other UI technologies. During his career, he has been involved in building enterprise solutions using latest technologies with rich user interfaces and open source tools.

He loves to spend time writing, learning, and discussing new technologies. He is an active member of the Liferay forum. He also writes technical articles for his blog at TechD of Computer World (http://techdc.blogspot.in). He has been a Liferay trainer at TCS and CIGNEX, where he has provided training on Liferay 5.x and 6.x versions. He was also a reviewer for the book Learning Bootstrap by Packt.

He can be reached on Skype at kravigupta and on Twitter at @kravigupta. Connect with him on LinkedIn at http://in.linkedin.com/in/kravigupta.

I would like to thank my lovely wife Kriti and my family for their tremendous support in tough times. All that I am is because of them. Their support has helped me through good and bad times.

Thank you so much my co-authors Hetal and Harmeet for excellent support, the Packt team for understanding and cooperation, and the reviewers and editorial team for providing the right feedback. I truly appreciate you guys.

Hetal Prajapati is a technical lead working with CIGNEX Datamatics. She is from Gandhinagar, the capital city of the vibrant state of Gujarat. She did her masters in IT from Dhirubhai Ambani Institute of Information and Communication Technology, Gandhinagar. Her expertise includes designing and developing solutions for Enterprise Content Management portals.

She has been involved in building enterprise solutions using Liferay and other open source technologies across different domains. She has been involved in imparting training for Liferay using Liferay 5.x and 6.x. Apart from Liferay, Hetal has also worked on many other technologies and frameworks, such as Java, MongoDB, Spring, Hibernate, jQuery, JavaScript, and AngularJS. She loves to listen to music and read books in her free time. She can be reached on Twitter at @hetalp84. You can also connect with her on LinkedIn at http://in.linkedin.com/in/hetalprajapati.

I would like to express gratitude for the support and help provided by the entire Packt Publishing team throughout this project.

I also like to thank my co-authors Ravi and Harmeet for their excellent support during the entire project. Finally, I wish to thank my parents, my husband Jayesh, and my son Prakhar for their support and encouragement throughout my project.

Harmeet Singh is a Sr. UI Developer working for Cignex Datamatics with varied experience in UI. He hails from the holy city of Amritsar, India. His expertise includes HTML5, JavaScript, jQuery, AngularJS, NodeJS, and more. His interests include music, sports, dancing, and adventures.

Harmeet has given various presentations and conducted workshops on UI development. On the academic front, Harmeet is a graduate in IT and a GNIIT diploma holder from NIIT specializing in software engineering. He can be reached on Skype at harmeetsingh090. You can also connect with him on LinkedIn at https://in.linkedin.com/in/harmeetsingh090.

I am really thankful to my colleagues Ravi, Hetal, and Nikhil whose support and encouragement led me to write this book and kept me motivated throughout the journey of completing this book. I am really thankful from the core of my heart to UI lead Mehul Bhatt and Vasim Khan for their immense contribution and guidelines.

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