Integration Tests for ASP.NET Core Web APIs using MSTest

Integration Tests for ASP.NET Core Web APIs using MSTest

Learn how to write integration tests for API endpoints using MSTest. Learn how to write integration tests for ASP.NET Core Web APIs using MSTest. We often want to write integration tests to evaluate our app's whole request-response pipeline. We want our API endpoints to return the same responses given the same requests. These integration tests are helpful in catching cases of missing properties in the JSON responses, mismatching upper/lower cases of property names, obsolete error messages, and so on.

Learn how to write integration tests for API endpoints using MSTest

We often want to write integration tests to evaluate our app’s whole request-response pipeline. For example, we want our API endpoints to return the same responses given the same requests. These integration tests are helpful in catching cases of missing properties in the JSON responses, mismatching upper/lower cases of property names, obsolete error messages, and so on.

The ASP.NET official documentation has an article entitled Integration tests in ASP.NET Core, which covers lots of aspects of integration tests in ASP.NET Core using the xUnit test framework. However, the magical IClassFixture<T> in xUnit creates confusion and difficulties for developers who are more familiar with other test frameworks. For instance, this GitHub issue points out the gap in developers’ expectations of the documentation on integration tests.

Here I am not going to steal the show from the ASP.NET Docs, and all the goodies are still in the official documentation. In this article, I will try to fill in the gap and show you how to write integration tests using MSTest. You can find my demo solution in this GitHub repository.

programming web-development dotnet testing aspdotnet

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