What you need for this book
You'll need two basic pieces of software for this book: Ruby and RSpec.
You can install the Ruby programming language from its web site:
https://www.ruby-lang.org/en/downloads/
The latest version at the time of writing is 2.3.0. Any version of Ruby greater than 2.0 should be fine.
I recommend that you use rbenv to install Ruby. This tool will make it easier to keep a clean Ruby environment. Professional Ruby developers rely on rbenv or similar tools to install and manage Ruby on their systems. You can find more info on rbenv on its GitHub page:
https://github.com/rbenv/rbenv
You can install RSpec using the rubygems installer (gem install rspec). The latest version of RSpec at the time of writing is 3.4.0, but any version ...
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