repository_test.rb

  # ...

  context "for a given user" do
    setup do
      topic.user = User.create(:name => "acme", :email => "a@b.com",
        :password => "h3ll0", :password_confirmation => "h3ll0")
      topic.description = "Foo Bar"
      topic.name = "foo_bar"
      topic.save!
      topic
    end
    
    topic.validates_uniqueness_of :name

  end.delete_all(User)

  # ...

teststrap.rb

module Riot
  module ActionController

    module ContextMacros
      # Meant to be a teardown method. Apply to any context and it will be called at the end
      #
      #   context "foo" do
      #     setup { User.create( ... ) }
      #     ...
      #   end.delete_all(User)
      def delete_all(model_class)
        model_class.delete_all
      end
    end # ContextMacros

  end # ActionController
end # Riot

Riot::Context.instance_eval do
  include Riot::ActionController::ContextMacros
end