Testing

Static dependency can be nightmare for developers who write tests for their code. There is not much to do to get rid of static dependencies if they come with third-party libraries or NuGet packages. This blog post introduces two tricks to make code with static dependencies testable.

Code coverage reports for ASP.NET Core projects are not provided out-of-box but using right tools we can build decent code coverage reports. I needed code coverage reports in some of my projects and here is how I made things work using different free libraries and packages.

My saga on supporting multiple tenants in ASP.NET Core web applications has come to point where tenants can use separate databases. It’s time now to write some tests for data context to make sure it behaves correct in unexpected situations. This post covers unit tests for data context and multi-tenancy.

When testing ASP.NET Core controllers in application that uses Azure AD we need usually current user at least for some tests. As there is no authenticated user when unit testing, we need to create one by our own. This blog post shows how to create claims identity for ASP.NET Core unit tests.

ASP.NET Core applications can be tested with different testing frameworks and Entity Framework Core makes testing specially easy by removing different technical problems from our way by using in-memory data provider. This blog posts shows how to unit test controllers that use data from Entity Framework Core.

Writing tests for ASP.NET Core applications can be done using xUnit. xUnit works on both.NET Framework and .NET Core. This post shows how to set up and use xUnit with ASP.NET Core applications in Visual Studio and on command-line. Targeting multiple frameworks is also covered.

Stored procedures in SQL Server database can be unit tested using Visual Studio database unit tests. It may seem as simple thing to do at first but when you start writing tests then you will find out it’s more complex task to do then expected. In this posting I will introduce database testing with Visual Studio tools.

Here’s my little example about how to use Moq to mock HttpContextBase and it’s members to make controller tests pass. You can use this code when you are not allowed to use open-source or use-on-your-own-risk pieces of software that provide you this kind on initialization using built-in features. Also it is good exercise that introduces you how to solve mocking problems.

Pex and Moles is new testing and code analysis technology that is created by Microsoft Research. Pex is powerful tool that helps you analyze your code, detect error situations and generate parameterized unit tests. In this posting I will give you quick and illustrated overview of Pex. (more…)

Lately I blogged about HttpNotFoundResult and HttpStatusCodeResult action results that come with ASP.NET MVC 3. These results are ideal for controller tests as we don’t have to mess with HttpContext and Response objects anymore. In this posting I will show you how to use HttpNotFoundResult in controller tests to check if errors are given correctly to user.