Cucumber is packaged as a gem and can be installed by running gem install cucumber. However, most of the examples in this book assume you install it via Bundler, which means having a Gemfile in the root directory of your project. Most of the examples also assume you’ll use RSpec,[75] so you’ll need that in your Gemfile too:
| source :rubygems |
| |
| group :test do |
| gem 'cucumber', '1.2.1' |
| gem 'rspec-expectations', '2.11.2' |
| end |
Cucumber will then install with the following command:
| $ bundle install |
To verify that you have installed it properly, run cucumber --help.