How to initialize IOption for unit testing a .NET core MVC service?

Question

I have a .NET core MVC rest service. I have a controller I wish to test. This controller has a constructor argument of IOptions where AppSettings is my class for config setting

Answer 1

I discovered the answer shortly after posting the question.

use Helper class Microsoft.Extensions.Options.Options

Creates a wrapper around an instance of TOptions to return itself as IOptions

AppSettings appSettings = new AppSettings() { ConnectionString = "..." };
IOptions options = Options.Create(appSettings);
MyController controller = new MyController(options);