Chapter 1. Exploring Testability from Unit Tests to Behavior-Driven Development

In this book, we are going to learn about RSpec in depth. But first, we need to lay some foundations. This chapter will introduce some important information that will prepare us for our exploration of RSpec.

First, we'll discuss the exciting promise of automated tests. We'll also discuss some of the pitfalls and challenges that are common when writing tests for real-world apps.

Next, we'll introduce the concept of testability, which will stay with us throughout this book. We'll then go over the technical assumptions made in the book.

We'll then start writing some simple unit tests with RSpec and explore the basic concepts of unit and test. We'll also start thinking about the usefulness of our tests and compare the cost of testing with its benefits.

Finally, we'll learn about two popular software methodologies: test-driven development (TDD) and behavior-driven development (BDD).