gistfile1.txt

First, the problem:

--(jadams@quant)-(55/pts/7)-(1217/25-Aug-10)--
--($:~/rails/asset_tracker_tutorial)(master)-- rake spec
(in /home/jadams/rails/asset_tracker_tutorial)
/home/jadams/.rvm/rubies/ruby-1.9.2-head/bin/ruby -S bundle exec  /home/jadams/.rvm/rubies/ruby-1.9.2-head/bin/ruby  -Ilib -Ispec "./spec/models/client_spec.rb" 
/home/jadams/.rvm/gems/ruby-1.9.2-head@rails3/gems/rspec-core-2.0.0.beta.20/lib/rspec/core/backward_compatibility.rb:20:in `const_missing': uninitialized constant ActionMailer::TestCase::Behavior (NameError)
	from /home/jadams/.rvm/gems/ruby-1.9.2-head@rails3/gems/rspec-expectations-2.0.0.beta.20/lib/rspec/expectations/backward_compatibility.rb:6:in `const_missing'
	from /home/jadams/.rvm/gems/ruby-1.9.2-head@rails3/gems/rspec-rails-2.0.0.beta.20/lib/rspec/rails/example/mailer_example_group.rb:9:in `<module:MailerExampleGroup>'
	from /home/jadams/.rvm/gems/ruby-1.9.2-head@rails3/gems/rspec-rails-2.0.0.beta.20/lib/rspec/rails/example/mailer_example_group.rb:3:in `<module:Rails>'
	from /home/jadams/.rvm/gems/ruby-1.9.2-head@rails3/gems/rspec-rails-2.0.0.beta.20/lib/rspec/rails/example/mailer_example_group.rb:2:in `<top (required)>'
	from /home/jadams/.rvm/gems/ruby-1.9.2-head@rails3/gems/rspec-rails-2.0.0.beta.20/lib/rspec/rails/example.rb:6:in `<top (required)>'
	from /home/jadams/.rvm/gems/ruby-1.9.2-head@rails3/gems/rspec-rails-2.0.0.beta.20/lib/rspec/rails.rb:10:in `<top (required)>'
	from /home/jadams/rails/asset_tracker_tutorial/spec/spec_helper.rb:4:in `<top (required)>'
	from ./spec/models/client_spec.rb:1:in `require'
	from ./spec/models/client_spec.rb:1:in `<main>'
rake aborted!
Command failed with status (1): [/home/jadams/.rvm/rubies/ruby-1.9.2-head/b...]

(See full trace by running task with --trace)

Now, here's the Gemfile:

source 'http://rubygems.org'

gem 'rails', '3.0.0.beta4'

gem 'sqlite3-ruby', :require => 'sqlite3'

gem 'rspec', ">=2.0.0.beta.19", :group => :test
group :test, :development do
  gem 'rspec-rails', '>=2.0.0.beta.19'
end

Any ideas?