Book Image

Hands-On Design Patterns with Swift

By : Florent Vilmart, Giordano Scalzo, Sergio De Simone
Book Image

Hands-On Design Patterns with Swift

By: Florent Vilmart, Giordano Scalzo, Sergio De Simone

Overview of this book

Swift keeps gaining traction not only amongst Apple developers but also as a server-side language. This book demonstrates how to apply design patterns and best practices in real-life situations, whether that's for new or already existing projects. You’ll begin with a quick refresher on Swift, the compiler, the standard library, and the foundation, followed by the Cocoa design patterns – the ones at the core of many cocoa libraries – to follow up with the creational, structural, and behavioral patterns as defined by the GoF. You'll get acquainted with application architecture, as well as the most popular architectural design patterns, such as MVC and MVVM, and learn to use them in the context of Swift. In addition, you’ll walk through dependency injection and functional reactive programming. Special emphasis will be given to techniques to handle concurrency, including callbacks, futures and promises, and reactive programming. These techniques will help you adopt a test-driven approach to your workflow in order to use Swift Package Manager and integrate the framework into the original code base, along with Unit and UI testing. By the end of the book, you'll be able to build applications that are scalable, faster, and easier to maintain.
Table of Contents (22 chapters)
Title Page
Copyright and Credits
About Packt
Contributors
Preface
Index

Chapter 14. Testing Your Code with Unit and UI Tests

For a long time, automatic testing wasn't as widely practiced in the iOS development community as it was in other software communities, such as Java or general backend development. However, doing automatic testing is now an accepted mainstream practice. I would even say it's a necessary method for anyone who aims to release sound and robust software. In this chapter, even an inexperienced developer will find all the needed information for testing their app using different techniques, such as TDD to design it or just adding tests at the end of the development.

The following topics will be covered in this chapter:

  • Unit testing using XCTest
  • Advanced testing techniques for testing in isolation using test doubles
  • UI testing with XCTUITest
  • A few tips and tricks to improve the effectiveness of our tests