Book Image

Test-Driven iOS Development with Swift 4 - Third Edition

By : Dr. Dominik Hauser
Book Image

Test-Driven iOS Development with Swift 4 - Third Edition

By: Dr. Dominik Hauser

Overview of this book

Test-driven development (TDD) is a proven way to find software bugs early. Writing tests before you code improves the structure and maintainability of your apps. Using TDD, in combination with Swift 4's improved syntax, means there is no longer any excuse for writing bad code. This book will help you understand the process of TDD and how to apply it to your apps written in Swift. Through practical, real-world examples, you’ll learn how to implement TDD in context. You will begin with an overview of the TDD workflow and then delve into unit-testing concepts and code cycles. You will also plan and structure your test-driven iOS app, and write tests to drive the development of view controllers and helper classes. Next, you’ll learn how to write tests for network code and explore how the test-driven approach—in combination with stubs—helps you write network code even before the backend component is finished. Finally, the book will guide you through the next steps to becoming a testing expert by discussing integration tests, Behavior Driven Development (BDD), open source testing frameworks, and UI Tests (introduced in Xcode 9).
Table of Contents (9 chapters)

What you have learned so far

In the course of this book, we have mainly written unit tests. As the name suggests, unit tests test small units in isolation. The advantage of using unit tests for TDD is the immediate feedback that is received in the TDD workflow. We wrote a test, ran it, and immediately got a feedback about the status of our code.

We used mocks, stubs, and fakes to separate the units from the rest of the code. This allowed us to focus the tests on one microfeature at a time.

Using TDD, we build a model, view controller, and the network layer of our app. Next, we put all the parts together to form a real iOS app. We have seen how to use UI tests to implement functional testing that focuses on individual features rather than units.

Finally, we also used fastlane to automate the deployment process.

But, as you might have guessed, there is more. This book is, at best...