... (this example is a little contrived). This is the first part of my posts about using Testing .Net Core Code with XUnit and its features for testing code, these posts series cover all parts of xunit in detail.. XUnit is a testing framework that allows us to write tests on our production code. With Fixie, I can implement any of the XUnit Test Patterns to implement a comprehensive automated test strategy (rather than, say, having different test frameworks for different kinds of tests). This means that you cannot currently visually group test by custom traits until they update their test runners. This works perfectly well, but if you're anything like … xUnit is a unit testing framework which supports .NET Core . Probably something they have changed a while ago. The only issue is the Visual Studio and Resharper test runners do not use the newer process to discover traits. By changing to a foreach loop we are able to repeat each test but we also provide the "iteration number". So lets get started. The test function CanAdd(value1, value2, expected) has three int parameters, and is decorated with a [MemberData] attribute that tells xUnit to load the parameters for the theory test from the Data property. This is where you conduct your tests. The simplest way to set up an XUnit test is to annotate a method with a Fact attribute. Exceptional Tests. Written by the original inventor of NUnit v2, xUnit.net is the latest technology for unit testing C#, F#, VB.NET and other .NET languages. It requires a delegate for subscription, another delegate to unsubscribe. The first assertion is Assert.Raises, it verifies that a event with the exact event args is raised. For the integration test I will use XUnit framework as the testing framework. For example, when we test a controller’s action to see if it’s returning the correct view. This is same as I did for the unit testing in my previous post ASP.Net Core Web API – Unit Testing With XUnit. From the .NET Core section, we have to choose “xUnit Test Project (.NET Core)” and provide the suitable name for this project as “XUnitTestDemo” and click OK. xUnit.net is a free, open source, community-focused unit testing tool for the .NET Framework. xUnit.net is a free, open source, community-focused unit testing tool for the .NET Framework. Let’s consider this class as an example. Using assertions in XUnit tests is very similar to NUnit, etc., the XUnit syntax just happens to be a little more concise. And I will introduce a couple of other Nuget packages along the way. The xUnit Samples repo on GitHub provides sample code for Category. It is preferable to use Assert.IsAssignableFrom<>() to check if the type of … xUnit support two different types of unit test, Fact and Theory. XUnit takes a different approach to handling tests that throw exceptions. The TestPattern method has the "Fact" attribute assigned to it. We use xUnit Fact when we have some criteria that always must be met, regardless of data. As you can see from the above example, I've created two methods. While on the previous example the Enumerable.Repeat was being used it would only run the test 1 time, somehow xUnit is not repeating the test. A broader testing strategy includes much more than just unit tests. In unit tests, each test … I use it to unit test my Document Controller WPF application (.NET Framework 4.6.1) and in this project, the AutoMapper is heavily used to map domain models to view models. Inside that method, there are a number of Assert calls within it. This also means if, for example, you need values in other properties of the controller object, such as Request, to be set for your function to be tested, you must set them before the test is run. We can write a unit test to test that a specific event have risen like this. 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