Need Integration Testing

[LewkyB]

https://docs.microsoft.com/en-us/aspnet/core/test/integration-tests?view=aspnetcore-6.0

[LewkyB]

examples testing controllers here: https://github.com/dotnet-architecture/eShopOnWeb/tree/9db2feb930c8cd1ce379bbebf76521a4ba0dddfb/tests/FunctionalTests/Web/Controllers