No one wants to cry over regression issues in views; does testing HTML and CSS have to be such a back and forth between designers and devs? Why is it that the rest of the stack can have TDD and BDD but not the presentation layer? Well, GreenOnion is here to help you get the same results on testing front-end styling that you've enjoyed in your unit and integration tests up to now.
GreenOnion records 'skins', which are snapshots of the current state of a view (or any page that a browser can navigate to). The first time that it is run on a view, it saves the skin; the second time that it is run, it will compare the first skin to the fresh (new) skin. You can either compare with a diff image that is automatically created, or by an outputted percentage of difference.

Growing Rails Applications in Practice

Check out our e-book. Learn to structure large Ruby on Rails codebases with the tools you already know and love.

• Introduce design conventions for controllers and user-facing models
• Create a system for growth
• Build applications to last

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