Installing Other Gems

Various chapters in this book uses other gems, such as rails or capybara. These are installed by adding them to your Gemfile and running bundle install. In most places, we will list what you need to put in your Gemfile, and you can always find the Gemfile by downloading an example’s source.

If you just want to install a complete set of all the gems used in the book in one go, you can use the master Gemfile listed in Appendix 3, ​Ruby Gem Versions​.