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.
Table of Contents (16 chapters)
Test-Driven JavaScript Development
Credits
About the Authors
About the Reviewers
www.PacktPub.com
Preface
Index

Follow right development practices


Let's understand right practices to do development using TDD for projects.

Simple code that can be easily understood

This process ensures that our design for the code is easy to understand and clear. This process helps us avoid extra code, which can introduce complexity. The main motive behind keeping the code simple is to make it easy to maintain and better to understand. Complex development ends up in a worst situation, so the key goal for any team member to work for any assignment is to achieve simplicity in design and avoid complex implementation. Walt Whitman, a famous American poet rightly said that "Simplicity is the glory of expression." Many times developers end up writing many lines of code, which can be achieved with few lines. This bad practice adds a complexity in the project for others to understand modules written in bad condition. We should always remember to write code in proper syntax and with good quality.

Writing assertions first

Writing...