Book Image

Polished Ruby Programming

By : Jeremy Evans
5 (1)
Book Image

Polished Ruby Programming

5 (1)
By: Jeremy Evans

Overview of this book

Anyone striving to become an expert Ruby programmer needs to be able to write maintainable applications. Polished Ruby Programming will help you get better at designing scalable and robust Ruby programs, so that no matter how big the codebase grows, maintaining it will be a breeze. This book takes you on a journey through implementation approaches for many common programming situations, the trade-offs inherent in each approach, and why you may choose to use different approaches in different situations. You'll start by refreshing Ruby fundamentals, such as correctly using core classes, class and method design, variable usage, error handling, and code formatting. Then you'll move on to higher-level programming principles, such as library design, use of metaprogramming and domain-specific languages, and refactoring. Finally, you'll learn principles specific to web application development, such as how to choose a database and web framework, and how to use advanced security features. By the end of this Ruby programming book, you’ll be a well rounded web developer with a deep understanding of Ruby. While most code examples and principles discussed in the book apply to all Ruby versions, some examples and principles are specific to Ruby 3.0, the latest release at the time of publication.
Table of Contents (23 chapters)
1
Section 1: Fundamental Ruby Programming Principles
8
Section 2: Ruby Library Programming Principles
17
Section 3: Ruby Web Programming Principles

Chapter 11: Testing to Ensure Your Code Works

Testing is more critical in Ruby than in most other programming environments, partly because of the power and flexibility Ruby offers, and also because of Ruby's dynamic typing. With proper testing, you can have confidence that your code works the way you expect, which is critical whenever you are making changes to it.

In this chapter, you'll learn that there are a lot of important considerations when testing, such as at what levels you want to test, how much abstraction should be used in your tests, and how thorough your tests need to be.

We will cover the following topics in this chapter:

  • Understanding why testing is so critical in Ruby
  • Learning different approaches to testing
  • Considering test complexity
  • Understanding the many levels of testing
  • Realizing that 100% coverage means nothing

By the end of this chapter, you'll have a better understanding of testing in Ruby, and be better able...