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factory_bot is a fixtures replacement with a straightforward definition syntax, support for multiple build strategies (saved instances, unsaved instances, attribute hashes, and stubbed objects), and support for multiple factories for the same class (user, admin_user, and so on), including factory inheritance.

If you want to use factory_bot with Rails, see factory_bot_rails.

A historical note: factory_bot used to be named factory_girl. An explanation of the name change can be found in the old factory_girl repository.

Interested in the project name?.

Documentation

You should find the documentation for your version of factory_bot on Rubygems.

See GETTING_STARTED for information on defining and using factories. We also have a detailed introductory video, available for free on Upcase.

Install

Add the following line to Gemfile:

ruby gem 'factory_bot'

and run bundle install from your shell.

To install the gem manually from your shell, run:

shell gem install factory_bot

Caveat: As of ActiveSupport 5.0 and above, Ruby 2.2.2+ is required. Because of Rubygems’ dependency resolution when installing gems, you may see an error similar to:

$ gem install factory_bot ERROR: Error installing factory_bot: activesupport requires Ruby version >= 2.2.2.

To bypass this, install a pre-5.0 version of ActiveSupport before installing manually.

Supported Ruby versions

The factory_bot 3.x+ series supports MRI Ruby 1.9. Additionally, factory_bot 3.6+ supports JRuby 1.6.7.2+ while running in 1.9 mode. See GETTING_STARTED for more information on configuring the JRuby environment.

For versions of Ruby prior to 1.9, please use factory_bot 2.x.

More Information

You may also find useful information under the factory_girl tag on Stack Overflow.

Contributing

Please see CONTRIBUTING.md.

factory_bot was originally written by Joe Ferris and is now maintained by Josh Clayton. Many improvements and bugfixes were contributed by the open source community.

License

factory_bot is Copyright © 2008-2016 Joe Ferris and thoughtbot. It is free software, and may be redistributed under the terms specified in the LICENSE file.

About thoughtbot

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factory_bot is maintained and funded by thoughtbot, inc. The names and logos for thoughtbot are trademarks of thoughtbot, inc.

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