Book Image

Object-Oriented JavaScript - Third Edition

By : Ved Antani, Stoyan STEFANOV
5 (1)
Book Image

Object-Oriented JavaScript - Third Edition

5 (1)
By: Ved Antani, Stoyan STEFANOV

Overview of this book

JavaScript is an object-oriented programming language that is used for website development. Web pages developed today currently follow a paradigm that has three clearly distinguishable parts: content (HTML), presentation (CSS), and behavior (JavaScript). JavaScript is one important pillar in this paradigm, and is responsible for the running of the web pages. This book will take your JavaScript skills to a new level of sophistication and get you prepared for your journey through professional web development. Updated for ES6, this book covers everything you will need to unleash the power of object-oriented programming in JavaScript while building professional web applications. The book begins with the basics of object-oriented programming in JavaScript and then gradually progresses to cover functions, objects, and prototypes, and how these concepts can be used to make your programs cleaner, more maintainable, faster, and compatible with other programs/libraries. By the end of the book, you will have learned how to incorporate object-oriented programming in your web development workflow to build professional JavaScript applications.
Table of Contents (25 chapters)
Object-Oriented JavaScript - Third Edition
About the Authors
About the Reviewer
Customer Feedback
Built-in Functions
Regular Expressions

Unit testing

When we talk about test cases, we mostly mean unit tests. It is incorrect to assume that the unit we want to test is always a function. The unit, or unit of work, is a logical unit that constitutes single behavior. This unit should be able to be invoked via a public interface and should be testable independently.

Thus, a unit test can perform the following functions:

  • It tests a single logical function

  • It can run without a specific order of execution

  • It takes care of its own dependencies and mock data

  • It always returns the same result for the same input

  • It should be self-explanatory, maintainable, and readable

Martin Fowler advocates the Test Pyramid ( strategy to make sure we have a high number of unit tests to ensure maximum code coverage. There are two important testing strategies that we will discuss in this chapter.

Test Driven Development

Test driven development (TDD) has gained a lot of prominence in the last few years. The concept...