Rails4 and ActionMailer::Base.deliveries

[IAmNan]

Can someone who is working with Rais 4 verify if ActionMailer::Base.deliveries returning valid data or an empty set? I'm looking at the ActiveMailer source code and changelog and nothing jumps out at me.

This is with the same code and configuration that worked for me in Rails 3.x but now with Rails 4.0.0.beta1 and Ruby 1.9.3p374. delivery_method is set to :test in both my development and test configuration files. The rest of ActionMailer seems to be working.

Thank you