ASP.NET Core introduced the concept of TestServer for the integration testing of web applications. Integration tests need web applications to run with all the bells and whistles to make sure that all the components work together with no flaws. Often we need special settings for integration tests as web applications cannot use live services and the easiest way to do it is to use a special appsettings.json file. This blog post shows how to do it.
Getting Started
Let's start with minimalistic integration test from ASP.NET Core integration tests document.