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

A list of to-do items

When starting the app (the one we are going to build), the user sees a list of to-do items on the screen of their iOS device. The items in the list consist of a title, an optional location, and the due date. New items can be added to the list by using an add (+) button, which is shown in the navigation bar of the view. The task list view will look like this:

Figure 4.1 – A list of to-do items

As a user, I have the following requirements:

  • I want to see a list of to-do items when I open the app.
  • I want to add to-do items to the list.

In a to-do list app, the user will obviously need to be able to check off items when they are finished. The checked items are shown below the unchecked items, and it is possible to uncheck them again. The app uses the Delete button in the UI of the table view to check and uncheck items. Checked items will be put at the end of the list in a section with the Done header. The UI for the...