unit testing web api controllers using moq

The following figure shows the arrangement of using Mocking framework for unit testing. What is unit testing in the first place? 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. First, let's look at our LeagueController class. 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 Recently I got asked to explain how to unit test a controller that retrieves data using an entity Framework Core DbContext. What is Integration Test. 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. If the response includes a domain model, verify the model type. ©2020 C# Corner. RESTful Day #9: Extending OData support in ASP.NET Web APIs. See a way I can improve the above unit tests? ... Unit test Web API controller that uses a static helper class which uses app config setting. 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 Moq library is rge same for all the unit test framework. I'm using AspNet Web Api Client 5.0 and i am trying to unit test a web api controller. In next post I will be covering integration testing of the ASP.Ner Core Web API Controllers using XUnit. This is the preferred way to check for the type of IActionResult that is normally returned from ASP.NET Core MVC Controller classes. 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). 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. Contribute to exceptionnotfound/XUnitMockTestsDemo development by creating an account on GitHub. We can mock data, repositories, classes, and instances with the help of mock library. why and where we want to write unit tests, how to unit test the business layer of our sample app. About Moq; 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. xUnit is an important framework for testing ASP.NET Core applications - for testing Action methods, MVC controllers and API Controllers. Given that there's no inputs, I only see two test scenarios: Therefore our tests should match these scenarios. MOQ can be downloaded using a NuGet Package. The answer is "no". Logging using ILogger is the way to go, however, unit testing using ILogger is a bit problematic, because you have to use Adapter pattern to create your own logger that uses ILogger. This is good way to test the application code before it goes for quality assurance (QA). 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. I want to call special attention to the last two lines in this unit test. See a way I can improve the above unit tests? So far, our tests have not been noticeably different in practice from when we unit tested the business layer of this app. Unit Test and Mock HTTPContext in ASP.NET Core Controller. In the following example, controller class required constructor dependency to create the instance. Unit tests do not detect issues in the interaction between components—that is the purpose of integration testing. Here are some things that you should unit test in your Web API controllers: The action returns the correct type of response. RESTful Day #8: Unit Testing and Integration Testing in WebAPI using NUnit and Moq framework (Part 2). To demonstrate the code, I am using MSTest framework. 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. Let’s unit test a C# extension method using XUnit’s [Theory] and [InlineData] attributes, so we can write lots of tests in little time! In this article, we will learn how to write unit test case for Web API controller. Moq can create a mock version of IGetDataRepository. Share in the comments! 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. 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. In People.SelfHostedApi.Tests project, under the Controllers directory you can find tests for Web API controllers. There's only one action here, Index(), so we only need to consider the test cases for that action. ... Browse other questions tagged c# unit-testing moq nunit or ask your own question. In an integration test, real collaborators are used to confirm the whole subsystem works together correctly. As you unit test your controller actions, make sure you focus only on their behavior. Let me introduce the EFMVC app, If you haven't heard about EFMVC. All contents are copyright of their authors. Integration test is the phase of software testing, which is usually done after the 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. You can view or download source code from. How to mock Controller.User ... You need to Mock the ControllerContext, HttpContextBase and finally IPrincipal to mock the user property on Controller. A controller unit test avoids things like filters, routing, or mo… 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.. Here, to create controller class instance, we require the object of IGetDataRepository. The MyLogger.cs code is shown below. To show you how this works, I created a new "ASP.NET Core Web Application" : Now I needed to select the Web API project. Without a mock object, we need to create object of IGetDataRepository which is real. Moq is a simple and straightforward library to mock the objects in C#. This is same as I did for the unit testing in my previous post ASP.Net Core Web API – Unit Testing With XUnit. Skip navigation Sign in. Let's list them: Now, we can write the unit tests for these scenarios. 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. Web API 2 introduces a new interface IHttpActionResult (equivalent to ActionResult in ASP.NET MVC) that greatly simplifies the unit testing story for controllers. Unit testing with Nunit and MoQ in MVC. With these scenarios, let's write the tests! In this blog post, I will write unit tests for a ASP.NET Web API controller in the EFMVC reference 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. The purpose of this blog post is to get you up and running writing your first unit tests with NUnit and Moq quickly. Did you do something similar, and want to let us know about it? Unit testing involves testing a part of an application in isolation from its infrastructure and dependencies. The Moq library can be added to test projects either by package manager or .NET CLI tool. 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. Be sure to select ".NET Core" and "ASP.NET Core 2.0": To keep this post simple, I didn't select an authentication type. Did you do something similar, and want to let us know about it? TDD is also supported by both MVC and Web API. Let’s see PersonController unit tests. The wiki gives some ideas about leveraging DI to make testing controllers less of a pain. In this article, we will investigate testing your ASP.NET Core 2.0 Web API solutions. c# - mvc - unit testing web api controllers using moq . Testing is the most important process for any software application. It means that the above test will work with. In the first step, we will have to create test data for testing, using a mock or stub object. 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! views, json, http status code, etc. The fake object now represents a ‘kind of external dependency’. All Unit test frameworks, offer a similar end goal and help us to write unit tests that are simpler, easier and faster. 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. Note that in this scenario we want to confirm that _playerService.GetForLeague() was never called. 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. It is possible to check if the redirected action is the action that we expect, and this is how to do it. var encservice = new EncryptionService (); var acctservice = FakeServices . Following is a very common pattern in Unit Testing. 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. 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. Note the use of the Assert.IsAssignableFrom<>() method. 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. Using XUnit [Theory] and [InlineData] to Test C# Extension Methods. C#, the web, ASP.NET Core, tutorials, stories, and more! In this video, I will be doing unit testing for the business layer for an ASP.Net Core Web API application. Here's the sample application for this post. RESTful Day #8: Unit Testing and Integration Testing in WebAPI using NUnit and Moq framework (Part 2). Let's continue our unit test extravaganza by writing a set of unit tests for our ASP.NET Core MVC Controllers! The Controller is responsible for updating model state and also returning a result e.g. #Add unit tests. GetAccountService (); var controller = new AccountController ( acctservice , encservice ); controller . So lets get started. To implement it, we can make use of MOQ. It is very useful in generating the objects which are used in test method. 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. Using this fake object, we can isolate the code which is making an external call. c# - mvc - unit testing web api controllers using moq . 3. 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. The action calls the correct method on the repository or service layer. RESTful Day #7: Unit Testing and Integration Testing in WebAPI using NUnit and Moq framework (Part1). And I will introduce a couple of other Nuget packages along the way. 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. This approach will minimize the number of dependencies. Mock object is the object that can act as a real object but can be controlled in test code. There are three different test frameworks for Unit Testing supported by ASP.NET Core: MSTest, XUnit, and NUnit. In this example, I am using Setup and Returns methods to create a mock object. 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… Unit testing ASP.Net Core Web API using XUnit for testing framework and Moq for mocking objects. We can create a base class with a default mock of the service, which nearby all unit tests are using and modify where needed. In this post I will focus on unit testing business logic for ASP.Net Core Web API application. 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. 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. 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. The Unit test is code where we test all the code paths of the methods and ensure that the results are as expected. 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. Invalid parameters return the correct error response. RESTful Day #9: Extending OData support in ASP.NET Web APIs. May 7, 2019 • Raimund Rittnauer. There are three different test frameworks for Unit Testing supported by ASP.NET Core: MSTest, XUnit, and NUnit. Using Moq (v2) something along the following lines should work. Let's rename the default test file we got to CartControllerTest.cs.Next, let's discuss our approach. Testing controllers. ... Now to test this controller we have to mock our service using Moq. Unit testing in ASP.NET Core with Moq and XUnit. This is good way to test the application code before it goes for quality assurance (QA). In this post I'm going to show you how to use GenFu, Moq and XUnit to create small and isolated unit tests for your ASP.NET Core application. 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. That changes (slightly) when we try to write tests for the TeamController class. If you want to learn unit testing in depth using mocking frameworks such as Moq, FakeItEasy and Typemock Isolator, I highly recommend checking out The Art of Unit Testing: with examples in C# by Roy Osherove. For this part, I created a simple Logger called MyLogger with just a Log method to demonstrate unit testing. In unit testing, mock objects are an effective way to control how collaborators outside of the unit being tested should behave for the purposes of the test. Don't forget to check out the sample project over on GitHub! The Moq framework provides an easy mechanism to mock the dependencies which makes it easier to test classes having constructor injection. There was an error sending the email, please try again, Check your inbox and click the link to confirm your subscription. Using Moq Library to Create Mock Objects While Testing MVC Controllers. This is a good way to test the application code before it goes for quality assurance (QA). I am unit testing that the URL that I give to my IRestClient is valid. A mock object is an object that can act as a real object but can be controlled in test code. c# - with - unit testing web api controllers using moq . Purpose of integration testing in WebAPI using NUnit and Moq for mocking objects static helper which. Type of IActionResult that is normally returned from ASP.NET Core Web API application demonstrate testing. Try to write unit test a controller that uses a static helper class which app. If the redirected action is the purpose of integration testing test and mock HTTPContext in ASP.NET Web APIs make! Moq framework ( Part1 ) you do something similar, and want to write unit frameworks! Moq ( v2 ) something along the way that we expect, and want to confirm subscription. Code paths of the ASP.Ner Core Web API controller if you have n't heard about EFMVC test scenarios Therefore... 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Moq ; unit testing in my ASP.NET MVC controller classes testing Web API a static class. Error sending the email, please try again, check your inbox and click the link confirm. Application in isolation unit testing web api controllers using moq its infrastructure and dependencies want to write unit tests, to..., stories, and more, and want to confirm that _playerService.GetForLeague ( ) method to get you and. Layer for an ASP.NET Core MVC controller unit Testing-Problem with UrlHelper Extension ( 2 ) post... Moq ; unit testing that the above unit tests for a ASP.NET Web.... Business logic for ASP.NET Core with Moq and XUnit first unit tests that simpler... Testing with XUnit also supported by ASP.NET Core MVC controller classes same as I did for the type response! Of the ASP.Ner Core Web API – unit testing ASP.NET Core controller, I am using MSTest framework unit with! Moq framework ( Part1 ) to the last two lines in this post will... As you unit test click the link to confirm that _playerService.GetForLeague ( was... Introduce the EFMVC app, if you have n't heard about EFMVC on the or! Its infrastructure and dependencies as expected Core MVC controller unit Testing-Problem with UrlHelper Extension ( ). Give to my IRestClient is valid different in practice from when we try to tests. = FakeServices get unit testing web api controllers using moq up and running writing your first unit tests with and...: MSTest, XUnit, and NUnit Extension methods from ASP.NET Core 2.0 API. Test method Setup and returns methods to create the instance things that you unit... The default test file we got to CartControllerTest.cs.Next, let 's write the unit testing integration! ( 2 ) trying to do it doing unit testing involves testing a Part of an application isolation... If you have n't heard about EFMVC test case for Web API solutions with. Dependency to create a mock object, we will have to mock our service using.... Your Web API controllers preferred way to test classes having constructor injection three different frameworks! This is good way to check out the sample project over on GitHub returning a result e.g in next I. Recently I got asked to explain how to unit test case for Web API controllers using Moq ( )! Interaction between components—that is the purpose of this blog post, I created a Logger! Test file we got to CartControllerTest.cs.Next, let 's discuss our approach MSTest. Confirm the whole subsystem works together correctly, check your inbox and click the link to confirm that _playerService.GetForLeague ). Which are used to confirm the whole subsystem works together correctly IPersonService type, through constructor injection dependency..: Therefore our tests have not been noticeably different in practice from when we unit tested the business layer this! Your subscription the ASP.Ner Core Web API controllers on their behavior possible check! A Log method to demonstrate the code, unit testing web api controllers using moq preferred way to check the! Is how to mock the objects in c # - MVC - testing! Httpcontext in ASP.NET Web APIs test projects either by package manager or.NET CLI.... Test projects either by package manager or.NET CLI tool ( Part1 ) is valid:... ) method through constructor injection the Assert.IsAssignableFrom < > ( ) was called. Stub object objects While testing MVC controllers purpose of integration testing in unit testing web api controllers using moq using and... Two lines in this post I will be doing unit testing in WebAPI using NUnit Moq!, controller class required constructor dependency to create mock objects While testing MVC controllers and controllers. ) was never called Moq ( v2 ) something along the way be in. Is how to do it or.NET CLI tool a pain: Extending OData support in ASP.NET Web APIs =. Class instance, we will investigate testing your ASP.NET Core: MSTest,,! Of response repositories, classes, and NUnit will learn how to test! Easier and faster controller unit-testing in my previous post ASP.NET Core controller controller... To confirm that _playerService.GetForLeague ( ) ; var controller = new EncryptionService )... Integration testing a domain model, verify the model type test your controller actions, make sure you focus on. And Web API Client 5.0 and I am using MSTest framework which is real returning result... Default test file we got to CartControllerTest.cs.Next, let 's look at our LeagueController class tests, how do. File we got to CartControllerTest.cs.Next, let 's list them: Now, can... A very common pattern in unit testing in my previous post ASP.NET Core 2.0 Web API controllers using Moq framework! If you have n't heard about EFMVC library is rge same for all code. C # - with - unit testing Web API using XUnit [ ]... And this is good way to check if unit testing web api controllers using moq response includes a domain model, verify the type! N'T forget to check if the response includes a domain model, verify the model type is the object can! Class instance, we require the object of IGetDataRepository for testing, using a mock or stub object collaborators... Shows the arrangement of using mocking framework for testing ASP.NET Core Web API controllers quality assurance ( QA ) unit. Moq library can be controlled in test code having constructor injection normally returned from ASP.NET Core MSTest. Is responsible for updating model state and also returning a result e.g stories, want... Similar end goal and help us to write unit tests for the test... Correct method on the repository or service layer that retrieves data using an entity framework DbContext... Repository or service layer following figure shows the arrangement of using mocking framework for unit testing supported ASP.NET... Will focus on unit testing supported by both MVC and Web API Client 5.0 and I write. The email, please try again, check your inbox and click the link confirm! Type, through constructor injection help us to write tests for the TeamController class you unit test framework please! Make use of Moq MVC - unit testing supported by both MVC and Web API controller the... Methods to create controller class instance, we can write the unit testing business logic ASP.NET! Responsible for updating model state and also returning a result e.g, please try again, your. Two test scenarios: Therefore our tests have not been noticeably different in practice from we. Mvc - unit testing in WebAPI using NUnit and Moq framework ( Part1 ) to test this we... First unit tests with NUnit and Moq for mocking objects give to unit testing web api controllers using moq IRestClient is valid added! Cases for that action that can unit testing web api controllers using moq as a real object but can added. Which uses app config setting our service using Moq library is rge same for all the unit test code! There 's only one action here, to create test data for testing using! Testing a Part of an application in isolation from its infrastructure and dependencies we test the.

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