unit testing web api controllers using nunit

I'll use NUnit and Moq framework to write test cases for controller methods. Let's add it to the solution like so: dotnet sln add test/test.csproj. Unit Testing Controllers In Web API. Unit Test and Mock HTTPContext in ASP.NET Core Controller Add new class project. Testing is the most important process for any software application. Open a shell window. NUnit Testing Framework Guide - That() - dotNet; How? In this article, you will learn about unit testing controllers in Web API. Creating the controller to test. 1. 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. Unit Testing the Business Layer in ASP.NET 5.0 with Moq ... The xUnit is an open-source unit testing tool for the .NET framework that simplifies the testing process and allows us to spend more time focusing on writing our tests: We are going to name it web-api-tests. I'm using Nunit to unit test my ApiController and i am using ExceptionFilter,iexceptionhandler and iexceptionlogger class's for exception handling . Let's see how to unit test ASP.NET 5.0 applications using XUnit and Moq! Intro to Unit Testing C# code with NUnit and Moq (part 1 ... Unit Testing in ASP.NET Core Web API - Code Maze Blog i am having Api controllers as a separate library . Unit Test a REST API? Everything You Need to Know There's a lot of info out there on how to cobble together NUnit Unit Testing of ASP.NET Pages and assorted goo. It is possible to use NUnit with .NET Core but some tasks are needed to be done manually because there is no template available with .NET Core. The key focus of Unit Testing is improving software quality by identifying and resolving defects before they are leaked into production. Set up unit tests of controller actions to focus on the controller's behavior. In the second part, we saw how to use Moq to create "fluent mocked" classes that will clean up our unit test code. Type. 16 stars 14 forks Star Step 2 − From the left pane, select Templates > Visual C# > Web. The advantage of using MVC is we can test the Model layer separately. It was based on some stuff I found online, but put my own flair on so I . Unit tests for a ASP.NET Web API controller in the EFMVC reference application. In .Net core 2 integration testing made been easy! Writing Integration Tests in ASP.NET Core using xUnit Download the entire source code of this article (Github) The examples in this post are specific for NUnit but, you can apply this pattern for safely running unit tests in parallel to any unit test framework that supports parallel execution.. To safely run tests in parallel, do the following: I recommend you first follow these steps to make your database tests run in parallel. Unit tests are implemented based on test frameworks like xUnit.net, MSTest, Moq, or NUnit. This unit test method can be used in Web API v1. Assert.IsType<OkObjectResult> (result); Above, either way, the Unit tests make our API robust and validates . Unit Testing - NUnit While developing the sample application for this article, I decided to install the NUnit unit testing tool through the NuGet package management tool so I could write some sample unit tests against the business layer of the application. This sort of code is expected to reside only in a driver. Now they're installed, let's look at a generic test template first. This article looks at unit testing patterns and describes the main patterns found in tested .NET code.It also describes the problems with each pattern. Unit testing a custom a method has an ActionFilter See below for explanations of each call. xUnit is an important framework for testing ASP.NET Core applications - for testing Action methods, MVC controllers and API Controllers. Unit Testing Model Validation; Unit Testing with Web Context Objects; Dependency Injection and IoC; Code Coverage; The Basics of Unit Testing. Automated Testing of ASP.NET Web API and MVC applications. Create a directory called unit-testing-using-nunit to hold the solution. This is the complete controller to test. But let's start with the simple cases, by testing the GET methods first. Testing additional actions, POST and PUT actions is almost the same. The controller we want to test is using an object that makes an HTTP call to an external dependency, it gets an order and returns it in the response. In this article, we'll learn on how to write unit tests for WebAPI controllers i.e. The source code is a sample CURD operations application that describes implementation of Unit Testing in Web API using nUnit and Moq framework. To test an MVC Controller we need to add MVC to our Test project. Roadmap Step 1 − Open the Visual Studio and click File → New → Project menu option. In People.SelfHostedApi.Tests project, under the Controllers directory you can find tests for Web API controllers. views, json, http status code, etc. 1. To test an application, you need to add a Unit Test project to the ASP.Net solution. UTF8 )) complete source is available at above URL from MSDN code sample. Select Create a new project on the initial screen as shown below All tests can be made to run in Visual Studio. Writing testable code is the norm these days, and writing tests for the components developed is a desired skill. In next post I will be covering integration testing of the ASP.Ner Core Web API Controllers using XUnit. After this a new pane will open on the left side which will contain all the test cases found by the test explorer. You need to configure the setup to expect a particular behavior or argument for the test. We have a simple Web Api project with 1 method: /api/test returns "hello". In this series, we'll cover 26 topics over a span of 26 weeks from January through June 2020, titled ASP .NET Core A-Z!To differentiate from the 2019 series, the 2020 series will mostly focus on a growing single codebase (NetLearner!) Step 2 − From the left pane, select Templates > Visual C# > Web. Here are the steps to test your Web Api methods with an in-memory webserver. For more information, see nUnit and Test Driven Development.Read the below nUnit tutorial to get more information on Nunit Unit testing and download Typemock Isolator for . The following is a simplified example of how a calling program might use the framework to load and run tests in a particular AppDomain. I find they require a lot of ceremony, are often brittle using many mocks and stubs, and often don't actually catch any errors. It previously used ASP.NET Core 3.0. To concise the solution consists of ASP.NET Web API project and a test project for testing service controllers and service Http response using HttpClient. The next thing we should do is to add the reference to the project we are . Integration tests are one such tests which cover a bigger section of our components and let us understand how good the components work with each other. TDD is also supported by both MVC and Web API. a02ee36. Abstract . My simpe controller: [ODataRoute ()] public IQueryable<T> Get (ODataQueryOptions opts) { VerifySelectExpandOptions (opts); return _dbContext.Set<T> ().AsQueryable (); } I can find many examples of how to create an . Do you have/want a Web Server on your Test/Build machine? Before reading this topic, you might want to read the tutorial Unit Testing ASP.NET Web API 2, which shows how to add a unit-test project to your solution.. Software versions used in the tutorial NunitDemo.Data is a class library that get's called by the HomeController in the NunitDemo.Web application. To test the integration of a web API or any other web based API, you need to have a web server running. REST's actual endpoints. For Implementation of unit testing in ASP.NET Core, I will be using Visual Studio 2019 Community Edition and .NET 5 to create a new project of type ASP.NET Core Web API. Unit tests should absolutely be used where they add value. All Unit test frameworks, offer a . Unit testing controllers. Let me introduce the EFMVC app, If you haven't heard about EFMVC. Testing controllers. NUnitASP is a nice class library to facilitate this kind of testing, but it doesn't solve a few problems:. In this article. ASP.NET Web API Unit Testing. The first thing we need is our testing frameworks, which we'll install via Nuget. Follow these steps to add the test project: Step 1 : Right-click on the project solution and select the Add -> New Project option. Even in this case a web server is needed, but fortunately there is a test server which can be used. i had registerd the above exception handling teniques in global.asax file ,which will be in a separate library. Use HttpStatusCode enum to assert the actual result type. The advantages of using Moq is, we can unit test the code successfully without using an external dependency object in the test code. All Unit test frameworks - MSTest, XUnit, and NUnit - offer a similar end goal and help us to write unit tests that are simpler, easier, and faster. This can be done using WebApplicationFactory class. A unit test doesn't test a module as a whole. A test Explorer window will appear in Visual Studio. Let assume we need to write integration testing of a server that exposes rest API for creating user and saving it to a database. Learn how to Unit test web api, simple and easy steps for unit testing web api controller code. ASP.NET Web API Unit Testing. Nunit_Demo.Tests is where the tests take place and run from. Now we have a new project in our solution named web-api-tests. Let's continue our unit test extravaganza by writing a set of unit tests for our ASP.NET 5.0 MVC Controllers! User-created runners should use the Engine API rather than dealing with the framework at this low level. 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). Stack Exchange Network Stack Exchange network consists of 178 Q&A communities including Stack Overflow , the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. Step 1 − Open the Visual Studio and click File → New → Project menu option. instead of new unrelated code snippets week. The Controller we want to test is an API controller that only includes two GET actions. We'll write tests for Product Controller. This tutorial assumes you are familiar with the basic concepts of ASP.NET Web API. The Controller is responsible for updating model state and also returning a result e.g. Integration testing the Controller. Multiple studies have shown that the later the defects are discovered . 2. There are three different test frameworks for Unit Testing supported by ASP.NET Core: MSTest, XUnit, and NUnit. . It tests the smallest units that make up a more significant module. In the first part of this series, we saw an overview of how to use Moq and XUnit, and heard some basic advice about when and how to write unit tests. So, in tests I need to make sure I pass a mocked object of this type, controlling calls . 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. ASP.NET Core Unit Testing - Setting the request body. In this example we will use NUnit as the Testing Framework. There has been a lot of discussion about how and even if the HttpClient class is testable. NUnit Testing Framework Guide - That () nUnit is an open-source unit testing framework for the .NET Framework and Mono. Unit Testing MVC Controllers. asp.net web api Unit test methods. It lives here: Tools > Nuget Package Manager > Package Manager Console. In this NUnit Tutorial you will learn how to use NUnit Testing in C# Console application using Visual Studio 2019.NUnit is a unit-testing framework for any .Net languages.. NUnit Testing C# Example. The Moq framework provides an easy mechanism to mock the dependencies which makes it easier to test classes having constructor injection. Summary. In this post I will focus on unit testing business logic for ASP.Net Core Web API application. The controller is a class like any other class which has members like methods and . This is good way to test the application code before it goes for quality assurance (QA). I'll use NUnit and Moq framework to write test cases for controller methods. Finally, we need to install our mocking library moq, with the following command: Unit testing is the testing of the logic in a given method. By using nUnit you can test your Services, but also your Controllers, Actions, etc. A new Project dialog opens. UPDATE (8 Jun 2021): This series has been updated to use ASP.NET 5.0. Writing automated tests helps finding defects earlier in the development lifecycle process which leads . To start using NUnit Testing Framework, either start a "NUnit Test Project" or you can install NUnit Framework from Nuget Package from your existing project. Inside this new directory, run the following command to create a new solution file for the class library and the test project: .NET CLI. Body, Encoding. The test is as below: [Test] [ExpectedException("System. We are currently using WebAPI.Testing by Jonathan Channon to test an ASP.NET Web API project from the outside in (rather than testing the controllers, it tests from outside of the routing, which means you can test your routes and controllers in one hit). Given that the GetAll method requires two parameters of Func<IQueryable<T>, IOrderedQueryable<T>> and string, the setup configures what to do based on the values entered . A new Project dialog opens. Assert.Equal (HttpStatusCode.OK, (HttpStatusCode)result.StatusCode); Example 2. It was initially ported from JUnit (a Java unit testing framework) and it has been developed and continually rewritten with many new . As you unit test your controller actions, make sure you focus only on its behavior. 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