1. Add the following to your ‘Gemfile’ which is located in the root of your application.
———-
# Testing Gems
group :test do
  gem ‘cucumber-rails’, ‘0.3.2’        # BDD testing framework based on Features
  gem ‘capybara’, ‘0.4.1.1’                # Integrations testing for Rack Applications (Rails)
  gem ‘rspec-rails’, ‘2.4.1’                # BDD testing framework
  gem ‘webrat’, ‘0.7.3’                       # Acceptance testing framework
end
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2. From a command prompt which has the current path set to the root of your Rails 3 application run the following command. This will install both the cucumber gem as well as the cucumber-rails gem. It will also install RSpec with all of its dependencies as well.
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bundle install
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3. Now you need to install rspec into your application. By running the rspec generator it will add new folders and files to your basic rails 3 application. In the command prompt where you just executed the previous command you are now going to execute the following command.
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rails g rspec:install
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4. Setup rspec to create tests automatically by adding a generator to your application.rb file
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config.generators do |g|
     g.test_framework :rspec
end
———-
5. Now you need to install cucumber into your application. By running the cucumber generator it will ad new folders and files to your basic rails 3 application. In the command prompt where you just executed the previous command you are now going to execute the following command. (please note the – -rspec and – -capybara are proceeded by two dashes in a row not single dashes.)
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rails g cucumber:install –rspec –capybara
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6. Now you need to install cucumber into your application. by running the cucumber generator which will add new folders and files to your basic rails 3 application. In the command prompt where you just executed the previous command you are going to execute the following command.
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rails g cucumber:install
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7. For color coded output on windows within the command prompt you will need to install ANSICON by following the steps below.

• Download http://adoxa.110mb.com/ansicon/ansi132.zip and unzip it
• Use a cmd prompt and navigate to where you unzipped it.
• CD into the x64 directory (unless you have a 32bit machine, then use the x86 one)
• Type “ansicon.exe –i” (without quotes)
• Open a new cmd prompt