Book Image

Test-Driven iOS Development with Swift - Fourth Edition

By : Dr. Dominik Hauser
Book Image

Test-Driven iOS Development with Swift - Fourth Edition

By: Dr. Dominik Hauser

Overview of this book

Test-driven development (TDD) is a proven way to find software bugs earlier on in software development. Writing tests before you code improves the structure and maintainability of your apps, and so using TDD in combination with Swift 5.5's improved syntax leaves you with no excuse for writing bad code. Developers working with iOS will be able to put their knowledge to work with this practical guide to TDD in iOS. This book will help you grasp the fundamentals and show you how to run TDD with Xcode. You'll learn how to test network code, navigate between different parts of the app, run asynchronous tests, and much more. Using practical, real-world examples, you'll begin with an overview of the TDD workflow and get to grips with unit testing concepts and code cycles. You'll then develop an entire iOS app using TDD while exploring different strategies for writing tests for models, view controllers, and networking code. Additionally, you'll explore how to test the user interface and business logic of iOS apps and even write tests for the network layer of the sample app. By the end of this TDD book, you'll be able to implement TDD methodologies comfortably in your day-to-day development for building scalable and robust applications.
Table of Contents (17 chapters)
Section 1 –The Basics of Test-Driven iOS Development
Section 2 –The Data Model
Section 3 –Views and View Controllers
Section 4 –Networking and Navigation


In this final chapter, we have implemented the navigation between the different views of our app. We have learned how to test pushing view controllers onto a navigation stack and how we can test whether a view got presented modally.

With navigation implemented, we started the app on the simulator and found and fixed bugs. We figured out that TDD even helps when fixing bugs. By writing first a failing test for that bug and then making the test pass, we ensured that this bug won't hurt us in the future of our app.

With the skills you gained in this chapter, you will be able to implement and test the navigation of an app using the coordinator pattern. And, you are now able to write tests for bugs and fix the bug by making the test pass.

Congratulations, you reached the end of this book! My hope is that this book is the beginning of your journey to becoming a test-driven developer. You learned how to test Combine code and write tests for view controllers and views...