Book Image

Test-Driven iOS Development with Swift - Fourth Edition

By : Dr. Dominik Hauser
5 (1)
Book Image

Test-Driven iOS Development with Swift - Fourth Edition

5 (1)
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


Automatic tests are an essential part of agile software development, especially unit tests, with their quick and reliable feedback helping developers to keep projects maintainable and clean. Test-driven development (TDD) methodology gives developers clear rules about how to build scalable, maintainable, and – as such – agile projects. Often, once the initial aversion to writing tests before the code is overcome, developers stick to TDD because they feel that their code is better and they are more confident in the result.

In this book, we will explore how to write unit tests for many different aspects of iOS development for iOS 15+. All that will be done in the context of test-driven development. The book starts with an introduction to testing in general and TDD in iOS apps and continues with building a complete app throughout the book. It covers basic UI structures, the Combine framework, async/await, and even SwiftUI.

After you've worked through the book and challenged yourself in the exercises, you will be able to write tests for a variety of code in iOS development, and you will have the tools to decide what to learn next in your journey to become an expert in test-driven iOS development.