Now, let's continue our test-writing spree and work up a bunch of unit tests for the MVC Controller classes in our sample app! c# - mvc - unit testing web api controllers using moq . #Add unit tests. Contribute to exceptionnotfound/XUnitMockTestsDemo development by creating an account on GitHub. Unit testing ASP.Net Core Web API using XUnit for testing framework and Moq for mocking objects. This is the preferred way to check for the type of IActionResult that is normally returned from ASP.NET Core MVC Controller classes. It means that the above test will work with. We can create a base class with a default mock of the service, which nearby all unit tests are using and modify where needed. Don't forget to check out the sample project over on GitHub! MOQ can be downloaded using a NuGet Package. To implement it, we can make use of MOQ. Mock object is the object that can act as a real object but can be controlled in test code. Finally, let's consider the PlayerController class: There are two actions in this controller, each with two outcomes that can be tested, for a total of four scenarios. Let me introduce the EFMVC app, If you haven't heard about EFMVC. Did you do something similar, and want to let us know about it? Moq can create a mock version of IGetDataRepository. Moq library allows us to manipulate the mock object in many ways, such as setting mock methods to return specific values, setting up required properties, and matching the specific arguments when test method is called mock object. This controller receives an IPersonService type, through constructor injection. When you unit test controller logic, only the content of a single action or method is tested, not the behavior of its dependencies or of the framework itself. Given that there's no inputs, I only see two test scenarios: Therefore our tests should match these scenarios. In an integration test, real collaborators are used to confirm the whole subsystem works together correctly. Invalid parameters return the correct error response. Before we start, let’s take a look at the EmployeesController’s constructor code: As you can see, we are using Dependency Injection to inject the interface in our controller. The action calls the correct method on the repository or service layer. RESTful Day #9: Extending OData support in ASP.NET Web APIs. ... Unit test Web API controller that uses a static helper class which uses app config setting. All contents are copyright of their authors. Unit testing with Nunit and MoQ in MVC. About Moq; There are three different test frameworks for Unit Testing supported by ASP.NET Core: MSTest, XUnit, and NUnit. There's only one action here, Index(), so we only need to consider the test cases for that action. The Moq framework provides an easy mechanism to mock the dependencies which makes it easier to test classes having constructor injection. How to mock Controller.User ... You need to Mock the ControllerContext, HttpContextBase and finally IPrincipal to mock the user property on Controller. Note that in this scenario we want to confirm that _playerService.GetForLeague() was never called. Without a mock object, we need to create object of IGetDataRepository which is real. This is a good way to test the application code before it goes for quality assurance (QA). views, json, http status code, etc. It is very useful in generating the objects which are used in test method. Here are some things that you should unit test in your Web API controllers: The action returns the correct type of response. The purpose of this blog post is to get you up and running writing your first unit tests with NUnit and Moq quickly. That changes (slightly) when we try to write tests for the TeamController class. 3. Note the use of the Assert.IsAssignableFrom<>() method. You can view or download source code from. In this project is nothing special, except the new PersonsController, which is using a PersonService: The Personclass is created in a new folder "Models" and is a simple POCO: The PersonServiceuses GenFu to auto generate a list of Persons: This Service needs to be regist… RESTful Day #7: Unit Testing and Integration Testing in WebAPI using NUnit and Moq framework (Part1). See a way I can improve the above unit tests? We can mock data, repositories, classes, and instances with the help of mock library. Web API 2 introduces a new interface IHttpActionResult (equivalent to ActionResult in ASP.NET MVC) that greatly simplifies the unit testing story for controllers. What is unit testing in the first place? In this video, I will be doing unit testing for the business layer for an ASP.Net Core Web API application. Integration test is the phase of software testing, which is usually done after the unit testing … In this article, we will learn how to write unit test case for Web API controller. From these actions, I see four test scenarios: You may be wondering why scenarios 4 and 5 are listed separately, given that they are expected to return the same type under similar conditions. I’ll purposely use Visual Studio 2010 and .NET Framework 4.0 because there are few implementations that are very hard to find in .NET Framework 4.0, but I’ll make it easy by showing how to do it. Unit Test is a block of code that helps us in verifying the expected behavior of the other code in isolation; i.e., there is no dependency between the tests. The Unit test is code where we test all the code paths of the methods and ensure that the results are as expected. First, let's look at our LeagueController class. The Moq library is rge same for all the unit test framework. So far, our tests have not been noticeably different in practice from when we unit tested the business layer of this app. To show you how this works, I created a new "ASP.NET Core Web Application" : Now I needed to select the Web API project. In this blog post, I will write unit tests for a ASP.NET Web API controller in the EFMVC reference application. See a way I can improve the above unit tests? The wiki gives some ideas about leveraging DI to make testing controllers less of a pain. TDD is also supported by both MVC and Web API. Here's the code for the TeamController class: Now we have two actions, and one of those actions relies on ModelState to make logical decisions. And I will introduce a couple of other Nuget packages along the way. This is good way to test the application code before it goes for quality assurance (QA). Share in the comments! So when we write unit tests, we do not execute them on the actual class instances, but instead perform in-memory unit testing by making a proxy of class objects. This is good way to test the application code before it goes for quality assurance (QA). In the following example, controller class required constructor dependency to create the instance. Writing unit tests for ASP.NET Core MVC Controller is not too different from unit testing other classes, with the main exceptions of setting up the controller class and using Assert.IsAssignableFrom<>() to check the results of actions. In this example, I am using Setup and Returns methods to create a mock object. Unit testing in ASP.NET Core with Moq and XUnit. Microsoft.VisualStudio.TestTools.UnitTesting; mock.Setup(p => p.GetNameById(1)).Returns(, Clean Architecture End To End In .NET 5, Getting Started With Azure Service Bus Queues And ASP.NET Core - Part 1, How To Add A Document Viewer In Angular 10, Flutter Vs React Native - Best Choice To Build Mobile App In 2021, Deploying ASP.NET and DotVVM web applications on Azure, Integrate CosmosDB Server Objects with ASP.NET Core MVC App, Authentication And Authorization In ASP.NET 5 With JWT And Swagger. There was an error sending the email, please try again, Check your inbox and click the link to confirm your subscription. Using this fake object, we can isolate the code which is making an external call. You may want to do this when a single action can redirect to multiple different places, depending on the inputs and logic of the method. Be sure to select ".NET Core" and "ASP.NET Core 2.0": To keep this post simple, I didn't select an authentication type. why and where we want to write unit tests, how to unit test the business layer of our sample app. Moq is a simple and straightforward library to mock the objects in C#. Recently I got asked to explain how to unit test a controller that retrieves data using an entity Framework Core DbContext. In this article, we will investigate testing your ASP.NET Core 2.0 Web API solutions. Let's continue our unit test extravaganza by writing a set of unit tests for our ASP.NET Core MVC Controllers! In People.SelfHostedApi.Tests project, under the Controllers directory you can find tests for Web API controllers. I want to call special attention to the last two lines in this unit test. May 7, 2019 • Raimund Rittnauer. In next post I will be covering integration testing of the ASP.Ner Core Web API Controllers using XUnit. 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