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- Herausgeber: Packt Publishing
- Kategorie: Wissenschaft und neue Technologien
- Sprache: Englisch
Write testable and maintainable code to develop highly-functional iOS apps
About This Book
- Learn test-driven principles to help you build apps with fewer bugs and better designs
- Become more efficient while working with Swift to move on to your next project faster!
- Implement all of the principles of test-driven development (TDD) in to your daily programming workflow
Who This Book Is For
My reader have already done some application development with Swift. They follow the changes in each new Swift version. They also follow a few Swift developers on Twitter or Tumblr and read blog post from famous Swift bloggers. My reader have already heard about Test-Driven Development (TDD) but haven't done really much about it. But they have heard/read that TDD can help to write better code but they don't really know why.
What You Will Learn
- Implement TDD in Swift application development
- Find bugs before you enter the code using the TDD approach
- Use TDD to build models, view controllers, and views
- Test network code with asynchronous tests and stubs
- Write code that is a joy to read and to maintain
- Develop functional tests to ensure the app works as planned
- Employ continuous integration to make testing and deployment easier
In Detail
Test-driven development (TDD) is a proven way to find software bugs early. Writing tests before your code improves the structure and maintainability of your apps. In combination with the improved syntax of Swift 3, there is no excuse or writing bad code.
This book will help you understand the process of TDD and how it impacts your apps written in Swift. Through a practical, real-world example app, you'll start seeing how to implement TDD in context. You will begin with an overview of the TDD workflow and then deep dive 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 the view controllers and the helper classes. Next, you'll learn how to write tests for network code, what CI is and how to set it up using Xcode Server.
Finally, the book will guide you through the next steps to become a testing expert by discussing integration tests, Behavior Driven Development (BDD), open source testing frameworks and UI Tests introduced in Xcode 8.
Style and approach
Using a step-by-step approach, you will develop an entire iOS app using TDD. During the course of the book, you will experience different strategies to write tests for models, View Controller, and networking code.
Sie lesen das E-Book in den Legimi-Apps auf:
Seitenzahl: 246
Veröffentlichungsjahr: 2016
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Table of Contents
Test-Driven iOS Development with Swift 3
Test-Driven iOS Development with Swift 3
Copyright © 2016 Packt Publishing
All rights reserved. No part of this book may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, without the prior written permission of the publisher, except in the case of brief quotations embedded in critical articles or reviews.
Every effort has been made in the preparation of this book to ensure the accuracy of the information presented. However, the information contained in this book is sold without warranty, either express or implied. Neither the author, nor Packt Publishing, and its dealers and distributors will be held liable for any damages caused or alleged to be caused directly or indirectly by this book.
Packt Publishing has endeavored to provide trademark information about all of the companies and products mentioned in this book by the appropriate use of capitals. However, Packt Publishing cannot guarantee the accuracy of this information.
First published: February 2016
Second edition: October 2016
Production reference: 1251016
Published by Packt Publishing Ltd.
Livery Place
35 Livery Street
Birmingham
B3 2PB, UK.
ISBN 978-1-78712-907-8
www.packtpub.com
Credits
Author
Dr. Dominik Hauser
Copy Editor
Yesha Gangani
Reviewer
S Ravi Shankar
Project Coordinator
Sheejal Shah
Commissioning Editor
Ashwin Nair
Proofreader
Safis Editing
Acquisition Editor
Reshma Raman
Indexer
Rekha Nair
Content Development Editor
Parshva Sheth
Production Coordinator
Aparna Bhagat
Technical Editor
Rutuja Vaze
About the Author
Dr. Dominik Hauser completed his Ph.D. from the University of Heidelberg in Physics. While working as a university professor, he started iOS development in his spare time. His first app on Physics has been an astounding success worldwide. Since then, he turned himself into a full-time iOS developer, crediting number of successful apps to his name. He has been a Swift developer since day one and runs a blog on iOS development, www.swiftandpainless.com.
I would like to thank my wife, Isa. Thank you for all your support during all those years and especially the last months while I wrote this book. I also want to thank all those great people in our community. I learned so much by reading excellent blog posts. I proud to be part of it.
About the Reviewer
S Ravi Shankar is a multi-skilled software consultant with over 17+ years of experience in IT Industry. Good all-around ability to work in different technologies and extensive experience in product development, system maintenance and support. A polyglot and a self-taught programmer with hands on experience in Swift, Objective-C and Java.
It was a pleasure to work with Sheejal and thanks to Packt publishing for giving me this opportunity.
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Preface
iOS projects have become bigger and more complex. Many projects have already surpassed desktop applications in their complexity. One important strategy to manage this complexity is through the use of unit tests. By writing tests, a developer can point out the intention of the code and provide a safety net against the introduction of bugs.
By writing the tests first (Test-Driven Development), the developer focuses on the problem. This way, they are forced to think about the domain and rephrase a feature request using their own understanding by writing the test. In addition to this, applications written using Test-Driven Development (TDD) only contain code that is needed to solve the problem.
As a result, the code is clearer, and the developer gains more confidence that the code actually works.
In this book, you will develop an entire iOS app using TDD. You will experience different strategies of writing tests for models, View Controller, and networking code.
What this book covers
Chapter 1, Your First Unit Tests, walks you through your first unit tests using Xcode and discusses the benefits of of using TDD.
Chapter 2, Planning and Structuring Your Test-Driven iOS App, introduces the app you are going to write through the course of this book and how to set up a project in Xcode.
Chapter 3, A Test-Driven Data Model, discusses the TDD of a data model.
Chapter 4, A Test-Driven View Controller, shows you how to write tests for View Controller, and describes how to use fake objects to isolate micro features for the test.
Chapter 5, Testing Network Code, teaches you to test network code using stubs to fake a server component before it is developed.
Chapter 6, Putting It All Together, walks you through the integration of all the different parts developed in previous chapters and shows the use of functional tests.
Chapter 7, Code Coverage and Continuous Integration, shows you how to measure the code coverage of your tests using Xcode and introduces you to continuous integration.
Chapter 8, Where to Go from Here, wraps up and shows you the possible next steps to improve your acquired testing skills.
What you need for this book
The following hardware and software is needed to follow the code examples in the book:
Who this book is for
If debugging iOS apps is a nerve-racking task for you and you are looking for a fix, this book is for you.
Conventions
In this book, you will find a number of text styles that distinguish between different kinds of information. Here are some examples of these styles and an explanation of their meaning.
Code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles are shown as follows: "To be able to write tests for your code, you need to import the module with the @testable keyword."
A block of code is set as follows:
func makeHeadline(string: String) -> String { return "This Is A Test Headline" }Any command-line input or output is written as follows:
ls -aNew terms and important words are shown in bold. Words that you see on the screen, for example, in menus or dialog boxes, appear in the text like this: "To edit the build scheme, click on Scheme in the toolbar in Xcode, and then click on Edit Scheme…."
Note
Warnings or important notes appear in a box like this.
Tip
Tips and tricks appear like this.
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Questions
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