Book Image

Test-Driven iOS Development with Swift

By : Dr. Dominik Hauser
Book Image

Test-Driven iOS Development with Swift

By: Dr. Dominik Hauser

Overview of this book

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 app. Test-Driven iOS Development with Swift will help you understand the process of TDD and how it impacts your applications written in Swift. Through practical, real-world examples, you’ll start seeing how to implement TDD in context. We will begin with an overview of your TDD workflow and then deep-dive into unit testing concepts and code cycles. We will showcase the workings of functional tests, which will help you improve the user interface. Finally, you will learn about automating deployments and continuous integration to run an environment.
Table of Contents (15 chapters)
Test-Driven iOS Development with Swift
Credits
About the Author
About the Reviewer
www.PacktPub.com
Preface
Index

Implementing DetailViewController


We start the implementation of DetailViewController with the creation of a test case. Select the ToDoTests group in Project Navigator, and go to iOS | Source | Unit Test Case Class. Let's name it DetailViewControllerTests, and select the Controller folder as the destination location. Import the @testable import ToDo main module and delete the two template test methods.

Going by the screenshots we've seen in Chapter 2, Planning and Structuring Your Test-Driven iOS App, we know that DetailViewController needs a map view, four labels, and a button. Here, we will only show the TDD process for one label and the button. Add the following code to DetailViewControllerTests:

func test_HasTitleLabel() {
    let storyboard = UIStoryboard(name: "Main",
        bundle: nil)
    let sut = storyboard.instantiateViewControllerWithIdentifier(
        "DetailViewController") as! DetailViewController
}

At this point, we have to stop writing the test because there is no DetailViewController...