error

1)
NoMethodError in 'UserMailer should create a new email row when sending an email'
You have a nil object when you didn't expect it!
The error occurred while evaluating nil.render_subject
/Users/josh/Code/HandCrafted/bootstrap/app/models/mailer.rb:16:in `setup_template'
/Users/josh/Code/HandCrafted/bootstrap/app/models/user_mailer.rb:23:in `setup_user_notification_email'
/Users/josh/Code/HandCrafted/bootstrap/app/models/user_mailer.rb:9:in `activation'
/Library/Ruby/Gems/1.8/gems/actionmailer-2.1.1/lib/action_mailer/base.rb:446:in `__send__'
/Library/Ruby/Gems/1.8/gems/actionmailer-2.1.1/lib/action_mailer/base.rb:446:in `create!'
/Library/Ruby/Gems/1.8/gems/actionmailer-2.1.1/lib/action_mailer/base.rb:439:in `initialize'
/Library/Ruby/Gems/1.8/gems/actionmailer-2.1.1/lib/action_mailer/base.rb:383:in `new'
/Library/Ruby/Gems/1.8/gems/actionmailer-2.1.1/lib/action_mailer/base.rb:383:in `method_missing'
/Users/josh/Code/HandCrafted/bootstrap/spec/models/user_mailer_spec.rb:9:
/Users/josh/Code/HandCrafted/bootstrap/script/spec:4:

user_mailer.rb

class UserMailer < Mailer

  def signup_notification(user)
    setup_user_notification_email('signup', user)
  end
  
  def activation(user)
    puts self.class
    setup_user_notification_email('activation', user)
  end
  
  def forgot_password(user)
    setup_user_notification_email('forgot_password', user)
  end
  
  def reset_password(user)
    setup_user_notification_email('reset_password', user)
  end
  
  private

    def setup_user_notification_email(name, user)
      setup_template(name, user.email) do |options|
        options['user'] = user
      end
    end
end

user_mailer_spec.rb

require File.dirname(__FILE__) + '/../spec_helper'

describe UserMailer do
  
  it "should create a new email row when sending an email" do
    user = Factory(:user)
    user_mailer = mock(UserMailer)
    user_mailer.should_receive(:setup_template)
    UserMailer.deliver_activation(user)
  end
  
  
end