There are different ways to test that the UIViewController has been successfully pushed onto the navigation stack and in this tutorial, I will cover a few of them. For this tutorial, I have created a simple project with two view controllers on the Main.storyboard. The very first view controller has a button. When the button…
Read More Test View Controller Push to Navigation ControllerIn this tutorial, I am going to share with you how to Unit Test some of the UITextField attributes in Swift. Learning how to Unit Test text field attributes covered in this blog post, should give you a good understanding of how to Uni Test other UITextField attributes. This blog post also contains video lessons.…
Read More Unit Testing Text Fields in SwiftThere are a few different ways to Unit test code that throws an Error in Swift and my preferred way is to use the XCTAssertThrowError and XCTAssertNoThrows. I will also share with you how to use the traditional way of handling an error with the do-try-catch. Error To Be Thrown Let’s assume that we have…
Read More Unit Testing Code That Throws Error in SwiftThere are different ways to load UIViewController in a Unit Test and in this tutorial you will learn three of them. Loading UIViewController from Main.storyboard, Loading UIViewController from XIB, Loading UIViewController that is not on the Main.storyboard and does have an interface XIB file. This is a type of UIViewController that creates views programmatically. Loading…
Read More Ways to Load UIViewController in a Unit TestTest Plans in Xcode allow us to run Unit Tests and UI Tests with different configurations multiple times. It is very convenient and is very quick. Available Configuration Options Each Test Plan can have a different configuration. Launch arguments and Launch environment variables, Language and region, Sanitizers and Main Thread Checker, Simulated location, UI Testing…
Read More Test Plans in XcodeThere are times when we need our UI Test code to pass some information to our mobile app, not by typing it into a Text Field or a Text View but by sending it as a command-line argument or as a launch environment property. To pass a command-line launch argument or an environment key-value pair…
Read More UI Testing. Launch Arguments & Launch EnvironmentWhen writing unit tests, developers try to follow the F.I.R.S.T principle as much as possible. F.I.R.S.T is a combination of multiple principles. Let’s learn what these are. Fast The first letter in the F.I.R.S.T principle stands for – Fast. Unit tests are small pieces of code that perform one, specific task. Because unit tests are…
Read More The F.I.R.S.T. Principle in Unit TestingThe addTeardownBlock(_:) runs right after the test method ends and before the instance’s tearDownWithError() method is called. Below is an example of a TestCase class that does not test anything and only demonstrates the order in which the setUp() and tearDown() methods are called. When will the addTeardownBlock(_:) run? The addTeardownBlock will run after the test method is…
Read More addTeardownBlock Example in XCTestCaseIn this tutorial, you will learn how to use the XCTAssertThrowsError assertion in Xcode Unit Test. The XCTAssertThrowsError asserts that an expression throws an error and it helps us write a unit test to verify that a method under the test will throw an error if we give it input parameters that cause an error.…
Read More XCTAssertThrowsError Assertion ExampleIn this XCTest tutorial, you will learn how to write a unit test that will test if UIButton is connected to @IBOutlet and has @IBAction assigned. For this tutorial, I will create a Single View application project. I will use the default View Controller that XCode creates for all new projects and I will position…
Read More XCTest. Test if UIButton is Connected And Has ActionAll unit test methods use Assertions to validate the result produced by the System Under the Test and present the user with a test method result. It is the assertion that will make a decision whether the test method is passing or failing. This blog post contains a list of assertions you can use with…
Read More A List of XCTest AssertionsIn this tutorial, you will learn how to build and run Xcode Unit Tests from the command line. Command Line Tools Package for Xcode To be able to build and test your project using the terminal window you will need to have the Command Line Tools package installed on your machine. If the machine you…
Read More Run Xcode Unit Tests From The Command LineWhen writing code we come up with method or function names all the time. And it is pretty much up to us developers how to name our methods. When writing Unit Tests in Xcode there are a few little requirements for a test method name which we must follow if we want our test method…
Read More Naming iOS Unit Test MethodsThere is a number of ways to disable a unit test in Xcode although it might not seem very obvious at first. In this blog post, I will share with you just a few that I personally use from time to time. Why Disable Unit Test? I am a strong advocate to always write unit…
Read More How to Disable or Skip Unit Test in XcodeUnit tests in Xcode can run in different orders. They can run in alphabetical order, randomized or executed in parallel. The default order in which Xcode runs unit tests is alphabetical. In this blog post, you will learn how the alphabetical order works. The Flow of Unit Test Execution For each test method, a new…
Read More The Order of Unit Tests in Xcode