I am having some trouble getting the right usage of Machinist and Shoulda in my testing.

Here is my test:

 context "on POST method rating" do
p = Product.make
u = nil
setup do
  u = login_as
  post :vote, :rating => 3, :id => p
end

should "set rating for product to 3" do
  assert_equal p.get_user_vote(u), 3
end

And here's my blueprints:

 Sham.login { Faker::Internet.user_name }
Sham.name { Faker::Lorem.words}
Sham.email { Faker::Internet.email}
Sham.body { Faker::Lorem.paragraphs(2)}

User.blueprint do
 login
 password "testpass"
 password_confirmation { password }
 email
end

Product.blueprint do
 name {Sham.name}
 user {User.make}
end

And my authentication test helper:

def login_as(u = nil)
   u ||= User.make()
   @controller.stubs(:current_user).returns(u)
   u
 end

The error I get is:

/home/jason/moderndarwin/vendor/rails/activerecord/lib/active_record/validations.rb:1090:in `save_without_dirty!': Validation failed: Login has already been taken, Email has already been taken (ActiveRecord::RecordInvalid)                                                         
       from /home/jason/moderndarwin/vendor/rails/activerecord/lib/active_record/dirty.rb:87:in `save_without_transactions!'                                                             
       from /home/jason/moderndarwin/vendor/rails/activerecord/lib/active_record/transactions.rb:200:in `save!'                                                                          
       from /home/jason/moderndarwin/vendor/rails/activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb:136:in `transaction'                                
       from /home/jason/moderndarwin/vendor/rails/activerecord/lib/active_record/transactions.rb:182:in `transaction'                                                                    
       from /home/jason/moderndarwin/vendor/rails/activerecord/lib/active_record/transactions.rb:200:in `save!'                                                                          
       from /home/jason/moderndarwin/vendor/rails/activerecord/lib/active_record/transactions.rb:208:in `rollback_active_record_state!'
       from /home/jason/moderndarwin/vendor/rails/activerecord/lib/active_record/transactions.rb:200:in `save!'
       from /usr/lib/ruby/gems/1.8/gems/machinist-1.0.6/lib/machinist/active_record.rb:55:in `make'
       from /home/jason/moderndarwin/test/blueprints.rb:37
       from /usr/lib/ruby/gems/1.8/gems/machinist-1.0.6/lib/machinist.rb:77:in `generate_attribute_value'
       from /usr/lib/ruby/gems/1.8/gems/machinist-1.0.6/lib/machinist.rb:46:in `method_missing'
       from /home/jason/moderndarwin/test/blueprints.rb:37
       from /usr/lib/ruby/gems/1.8/gems/machinist-1.0.6/lib/machinist.rb:20:in `instance_eval'
       from /usr/lib/ruby/gems/1.8/gems/machinist-1.0.6/lib/machinist.rb:20:in `run'
       from /usr/lib/ruby/gems/1.8/gems/machinist-1.0.6/lib/machinist/active_record.rb:53:in `make'
       from ./test/functional/products_controller_test.rb:25:in `__bind_1269805681_945912'
       from /home/jason/moderndarwin/vendor/gems/thoughtbot-shoulda-2.10.2/lib/shoulda/context.rb:293:in `call'
       from /home/jason/moderndarwin/vendor/gems/thoughtbot-shoulda-2.10.2/lib/shoulda/context.rb:293:in `merge_block'
       from /home/jason/moderndarwin/vendor/gems/thoughtbot-shoulda-2.10.2/lib/shoulda/context.rb:288:in `initialize'
       from /home/jason/moderndarwin/vendor/gems/thoughtbot-shoulda-2.10.2/lib/shoulda/context.rb:169:in `new'
       from /home/jason/moderndarwin/vendor/gems/thoughtbot-shoulda-2.10.2/lib/shoulda/context.rb:169:in `context'
       from ./test/functional/products_controller_test.rb:24

I can't figure out what it is I'm doing wrong... I have tested the login_as with my auth (Authlogic) in my user_controller testing.

Any pointers in the right direction would be much appreciated!