Vanity is an Experiment Driven Development framework for Rails.

• All about Vanity: vanity.labnotes.org

• On github: github.com/assaf/vanity

A/B Testing With Rails (In 5 Easy Steps)¶ ↑

Step 1: Start using Vanity in your Rails application:

Rails::Initializer.run do |config|
  gem.config "vanity"

  config.after_initialize do
    require "vanity"
  end
end

And:

class ApplicationController < ActionController::Base
  use_vanity :current_user
end

Step 2: Define your first A/B test. This experiment goes in the file experiments/price_options.rb:

ab_test "Price options" do
  description "Mirror, mirror on the wall, who's the better price of all?"
  alternatives 19, 25, 29
  metrics :signups
end

Step 3: Present the different options to your users:

<h2>Get started for only $<%= ab_test :price_options %> a month!</h2>

Step 4: Measure conversion:

class SignupController < ApplicationController
  def signup
    @account = Account.new(params[:account])
    if @account.save
      track! :signups
      redirect_to @acccount
    else
      render action: :offer
    end
  end
end

Step 5: Check the report:

vanity report --output vanity.html

Building From Source¶ ↑

To run the test suite for the first time:

$ rake test:setup test

Vanity is tested against multiple Ruby implementations. To run the full test suite against all Ruby implementations and bundled adapters:

$ rake test:rubies
$ # only ruby 1.9.2
$ rake test:rubies[1.9.2]
$ # only redis
$ rake test:adapters[redis]

To build the documentation:

$ rake docs
$ open html/index.html

To clean up after yourself:

$ rake clobber

To package Vanity as a gem and install on your machine:

$ rake install

Credits/License¶ ↑

Original code, copyright of Assaf Arkin, released under the MIT license.

Documentation available under the Creative Commons Attribution license.

For full list of credits and licenses: vanity.labnotes.org/credits.html.