Book Image

The Clojure Workshop

By : Joseph Fahey, Thomas Haratyk, Scott McCaughie, Yehonathan Sharvit, Konrad Szydlo
Book Image

The Clojure Workshop

By: Joseph Fahey, Thomas Haratyk, Scott McCaughie, Yehonathan Sharvit, Konrad Szydlo

Overview of this book

The Clojure Workshop is a step-by-step guide to Clojure and ClojureScript, designed to quickly get you up and running as a confident, knowledgeable developer. Because of the functional nature of the language, Clojure programming is quite different to what many developers will have experienced. As hosted languages, Clojure and ClojureScript can also be daunting for newcomers because of complexities in the tooling and the challenge of interacting with the host platforms. To help you overcome these barriers, this book adopts a practical approach. Every chapter is centered around building something. As you progress through the book, you will progressively develop the 'muscle memory' that will make you a productive Clojure programmer, and help you see the world through the concepts of functional programming. You will also gain familiarity with common idioms and patterns, as well as exposure to some of the most widely used libraries. Unlike many Clojure books, this Workshop will include significant coverage of both Clojure and ClojureScript. This makes it useful no matter your goal or preferred platform, and provides a fresh perspective on the hosted nature of the language. By the end of this book, you'll have the knowledge, skills and confidence to creatively tackle your own ambitious projects with Clojure and ClojureScript.
Table of Contents (17 chapters)
Free Chapter
2
2. Data Types and Immutability

Why Testing Is Important

At the beginning of this chapter, we saw that software testing is important. Why? In order to answer that, we will need to understand what software testing is. It can be defined as a process that ensures that a particular piece of software is bug-free. A software bug is a problem that causes a program to crash or produce invalid output. In Chapter 9, Host Platform Interoperability with Java and JavaScript, we learned about errors in Clojure and ClojureScript. Testing is a step-by-step process that ensures that software passes expected standards of performance, set by customers or the industry. These steps can also help to identify errors, gaps, or missing requirements. Bugs, errors, and defects are synonyms. They all mean problems with our software.

The benefits of software testing are as follows:

  • Providing a high-quality product with low maintenance costs
  • Assuring the accuracy and consistency of the product
  • Discovering errors that are not...