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Test-Driven iOS Development with Swift

You're reading from   Test-Driven iOS Development with Swift Create fully-featured and highly functional iOS apps by writing tests first

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Product type Paperback
Published in Feb 2016
Publisher Packt
ISBN-13 9781785880735
Length 218 pages
Edition 1st Edition
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Author (1):
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Dr. Dominik Hauser Dr. Dominik Hauser
Author Profile Icon Dr. Dominik Hauser
Dr. Dominik Hauser
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Toc

Implementing asynchronous tests


In the previous chapter, we wrote a stub for CLGeocoder. Now, we will write a test that asserts that the geocoder built into CoreLocation works as we expect it to. The fetching of coordinates from a geocoder is asynchronous. This means that we have to write a test that can deal with asynchronous interfaces.

But let's first structure the files a bit in the Project Navigator of Xcode. Select all the controller files in the main target (ItemListViewController.swift, ItemListDataProvider.swift, ItemCell.swift, DetailViewController.swift, and InputViewController.swift), and control + left-click to create a group from the selection. Let's call this group Controller. Do the same with the corresponding test cases in the test target.

Now, let's get started with the test. We start naïvely. Add the following test to InputViewControllerTests:

func test_GeocoderWorksAsExpected() {
    
    CLGeocoder().geocodeAddressString("Infinite Loop 1, Cupertino") {
        (placemarks...
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