Write better Unit tests with XCTUnwrap
Testing optionals can require boilerplate code to unwrap it. It can also affect the readability of the test. Let's look...
Test static method on collaborator
One of the main issues we are facing when we try to make an old piece of code testable is...
Dependency injection – UIViewController in Storyboard (iOS 13)
Finally Apple (iOS 13 +) has added constructor dependency injection to Storyboards! No excuses anymore for not using DI properly...
Unit testing code with DispatchQueue
One way of testing code with DispatchQueue is by using expectations (https://developer.apple.com/documentation/xctest/asynchronous_tests_and_expectations/testing_asynchronous_operations_with_expectations) but in most of the cases it's more...
Unit testing UIViewController LifeCycle
Unit testing UIViewController life cycle events are not a straightforward process. Let's have a look on the following view controller:...
Dependency Injection – UIViewController with a Nib file
UIViewControllers are among the most used UIKit objects. As the name implies UIViewControllers are controller objects and their purpose should...
Unit Test Post Notification
In this article, we will see how we can test code that post notifications. Let's see our example code: ...
Unit Test NotificationCenter
In this article, we will see how we can test code that interacts with the NotificationCenter. The Observer pattern is...
Unit Test Result type and closure
In this article, we will see how to test Result types and closures. To keep it simple, we will use...
