O'Reilly logo

Test-Driven iOS Development with Swift 3 by Dr. Dominik Hauser

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

Chapter 5. Testing Network Code

Most apps in the App Store perform networking in one way or the other. Apple provides a great class for network requests—URLSession. Its requests are asynchronous. This means that the response is delivered on a background thread. If that wasn't the case, the UI would freeze while the app waits for a response from the server.

The main topic of this chapter is how to test an asynchronous API. There are two ways to write tests for asynchronous API calls. Firstly, it can be done using the real server that is going to be used when the app is in the App Store. Secondly, it can be done using stubs, as we did in the previous chapter.

Both methods have their advantages. Tests with the real server let us additionally test whether ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required