integration tests for PKCE

[brockallen]

No description provided.

[mderriey]

Are you looking at creating integration tests as you did in the ASP.NET Core repo or an end-to-end test scenario with an authorize request followed by a token request? I'll be happy to contribute to this one, too, if that's OK.

[mderriey]

Sorry, I feel the previous message wasn't clear. Are you looking at creating a specific integration tests project like for IdSrv4 or create such tests in the existing project?

[brockallen]

We want tests in both, but we need to start here (IdSvr3). So yes, integration tests like the ones we have here in the ~/conformance folder.

And yes, feel free to take a stab at them.