Feature: orchestration of method chains

[onyxrev]

Currently you can orchestrate the top-level call with default scenarios underneath:

API::FakeAccountsClient::V2.class_call(:oauth_access_tokens).yields(:success)

API::FakeAccountsClient::V2.oauth_access_tokens.create
success!

But that would also make the following succeed:

API::FakeAccountsClient::V2.class_call(:oauth_access_tokens).yields(:success)

API::FakeAccountsClient::V2.oauth_access_tokens.destroy
success!

... which may not provide sufficiently fine-grained control.

I'd like to be able to do something like:

API::FakeAccountsClient::V2.class_call(:oauth_access_tokens, :create).yields(:success)

Or maybe even:

API::FakeAccountsClient::V2.class_call(:oauth_access_tokens, :create).yields(:success, :failure)

You get the idea. The syntax is up for discussion.