I have an application that uses ASP.NET Core Identity with classic logins and there's a need to cover this application with integration tests. Some tests are for anonymous users and others for authenticated users. This blog post shows how to set selectively set authenticated ASP.NET Core user identities for ASP.NET Core integration tests.
Getting Started
We start with an ASP.NET Core web application where basic authentication is done using ASP.NET Core Identity. There's an integration tests project that uses a fake startup class and custom appsettings.json from my blog post, Using custom startup class with ASP.NET Core integration tests. Take a look at this post as there are some additional classes defined.