Add `spy_on` method
Created by: thomas-holmes
This is a rough first pass at adding the method. I'm not happy with its location and it seems kind of ugly but it appears to match the specification in rspec/rspec-mocks#492
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Created by: thomas-holmes
This is a rough first pass at adding the method. I'm not happy with its location and it seems kind of ugly but it appears to match the specification in rspec/rspec-mocks#492