Unit testing ASP.Net Core Web API using XUnit for testing framework and Moq for mocking objects. I want to call special attention to the last two lines in this unit test. The MyLogger.cs code is shown below. In this article, we shall see the Unit Test and Mock the HttpRequest in ASP.NET Core Controller.. As we understood in the Best practices of API Controller Unit Testing “Controller” unit testing is important to make API or MVC Controller it robust.. 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. There are three different test frameworks for Unit Testing supported by ASP.NET Core: In my previous articles, I have explained how to write unit tests with different frameworks (i.e. The 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. To demonstrate the code, I am using MSTest framework. Mocking HttpClient in unit tests with Moq and Xunit when using IHttpClientFactory .NET Core has done a great job by introducing interface for most of classes which makes them easy to write unit tests around them. Using Moq Library to Create Mock Objects While Testing MVC Controllers. GetAccountService (); var controller = new AccountController ( acctservice , encservice ); controller . We've already seen why and where we want to write unit tests, how to use Moq to create fluent mocked classes to make our tests more readable, and even how to unit test the business layer of our sample app. Let’s see PersonController unit tests. And I will introduce a couple of other Nuget packages along the way. Let's list them: Now, we can write the unit tests for these scenarios. There are three different test frameworks for Unit Testing supported by ASP.NET Core: MSTest, XUnit, and NUnit. In a previous article, we discussed how to do ASP.NET MVC Model Testing using NUnit and MOQ.Today we will learn how to test another major component of MVC, and that is the Controller. The Controller is responsible for updating model state and also returning a result e.g. views, json, http status code, etc. You can view or download source code from. Using XUnit [Theory] and [InlineData] to Test C# Extension Methods. 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. In this video, I will be doing unit testing for the business layer for an ASP.Net Core Web API application. 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. 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! See a way I can improve the above unit tests? The following figure shows the arrangement of using Mocking framework for unit testing. ASP.NET MVC Controller Unit Testing-Problem with UrlHelper Extension (2) Trying to do some controller unit-testing in my ASP.NET MVC 3 web application. May 7, 2019 • Raimund Rittnauer. Mock object is the object that can act as a real object but can be controlled in test code. How to mock Controller.User ... You need to Mock the ControllerContext, HttpContextBase and finally IPrincipal to mock the user property on Controller. It means that the above test will work with. Did you do something similar, and want to let us know about it? Be sure to select ".NET Core" and "ASP.NET Core 2.0": To keep this post simple, I didn't select an authentication type. A mock object is an object that can act as a real object but can be controlled in test code. This is good way to test the application code before it goes for quality assurance (QA). A controller method can now return an implementation of IHttpActionResult , which internally uses the Request or the UrlHelper for link generation, so the unit test cares only about the returned IHttpActionResult instance. 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. Because unit testing is also regression testing, we want to know when the action changes its dependencies, and unit testing those scenarios separately is a good way to do that. Unit testing with Nunit and MoQ in MVC. RESTful Day #7: Unit Testing and Integration Testing in WebAPI using NUnit and Moq framework (Part1). I am unit testing that the URL that I give to my IRestClient is valid. See a way I can improve the above unit tests? TDD is also supported by both MVC and Web API. For this part, I created a simple Logger called MyLogger with just a Log method to demonstrate unit testing. ... Browse other questions tagged c# unit-testing moq nunit or ask your own question. The primary reason is that in Scenario 5, the method _teamService.Search() is expected to be called, whereas in Scenario 4, it will not be. About Moq; In this post I will focus on unit testing business logic for ASP.Net Core Web API application. In this article, we will learn how to write unit test case for Web API controller. We can create a base class with a default mock of the service, which nearby all unit tests are using and modify where needed. ... Unit test Web API controller that uses a static helper class which uses app config setting. 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… Let me introduce the EFMVC app, If you haven't heard about EFMVC. In the next and final post in this series, we will test a C# extension method using XUnit's [Theory] and [InlineData] attributes, showing how you can run many tests with the same expected outcome in just a few lines of code. There are three different test frameworks for Unit Testing supported by ASP.NET Core: MSTest, XUnit, and NUnit. In the first step, we will have to create test data for testing, using a mock or stub object. We want to: Test all the execution paths, there are currently two different paths through our CartController depending on whether _paymentService.Charge() answers with true or false; Write two tests, we need at least two different tests, one for each execution path So far, our tests have not been noticeably different in practice from when we unit tested the business layer of this app. Testing is the most important process for any software application. In People.SelfHostedApi.Tests project, under the Controllers directory you can find tests for Web API controllers. 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. This is same as I did for the unit testing in my previous post ASP.Net Core Web API – Unit Testing With XUnit. This is a good way to test the application code before it goes for quality assurance (QA). Web API 2 introduces a new interface IHttpActionResult (equivalent to ActionResult in ASP.NET MVC) that greatly simplifies the unit testing story for controllers. With these scenarios, let's write the tests! This approach will minimize the number of dependencies. 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. Let's continue our unit test extravaganza by writing a set of unit tests for our ASP.NET Core MVC Controllers! Invalid parameters return the correct error response. The primary differences you see when setting up unit tests for ASP.NET MVC Controller are: 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. 3. Don't forget to check out the sample project over on GitHub! Note the use of the Assert.IsAssignableFrom<>() method. Testing controllers. Did you do something similar, and want to let us know about it? Following is a very common pattern in Unit Testing. It begins by defining what a „unit“ is and although this is not strictly defined, unit represents a unit of work – usually a single method in our code.We test these units individually, making sure that each of them is doing exactly that what it is written for.Nothing more, nothing less.What is important to understand is that we are not testing the behavior of the dependencies of that method. 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. I'm using AspNet Web Api Client 5.0 and i am trying to unit test a web api controller. The Setup method is used to tell the mock object how to behave when it calls for test method and return methods returns a specific value. This controller receives an IPersonService type, through constructor injection. Moq can create a mock version of IGetDataRepository. Here, to create controller class instance, we require the object of IGetDataRepository. Unit testing in ASP.NET Core with Moq and XUnit. c# - with - unit testing web api controllers using moq . What is unit testing in the first place? To implement it, we can make use of MOQ. If the response includes a domain model, verify the model type. c# - mvc - unit testing web api controllers using moq . EFMVC is a simple app, developed as a reference implementation for demonstrating ASP.NET MVC, EF Code First, ASP.NET Web API, Domain-Driven Design (DDD), Test-Driven Development (DDD). What is Integration Test. RESTful Day #9: Extending OData support in ASP.NET Web APIs. ©2020 C# Corner. To show you how this works, I created a new "ASP.NET Core Web Application" : Now I needed to select the Web API project. 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