GetAndEnsureRedirectAsync

[ardalis]

Add a method that gets a route and ensures the response is a redirect. Add an optional string argument that is the expected path of the redirect. You'll probably need to configure the client to not automatically follow redirects.

Note I'm not sure we can perform this check without creating a new instance of HttpClient.

See: https://stackoverflow.com/questions/10453892/how-can-i-get-system-net-http-httpclient-to-not-follow-302-redirects

If we need a new instance, it won't really make sense to use an extension method on the existing instance. We could require that the instance we're given have this property set:

AllowAutoRedirect = false;

but there's no public property that shows that information on HttpClient that I see.

We might need to use reflection on the client to see if its handler's MaxRedirects is set to 0 or not.