Image comparable it's a gem inspired by NAKAL
The principal idea is providing an easy way to develop your visual regression tests, Image Comparable use Chunky::PNG a pure ruby lib to read and write images.
Compare pixel by pixel and generate an image_diff with the modifications
Add this line to your application's Gemfile:
gem 'image_comparable'And then execute:
$ bundle
Or install it yourself as:
$ gem install image_comparable
Add in you gemfile
gem 'image_comparable'
In top level of you class
require 'image_comparable'
You must have two images to compare such as baseline and screenshoot to compare. To execute the main method from ImageCompare follow the exemple bellow:
ImageComparable.execute(File.join('path/baseline.png'),File.join('path/screenshot.png'),1)
the first parameter is a path to you baseline image, second parameter is a path to you screenshot image, and the third parameter is a acceptant criteria, this parameter its a guide to ImageComparable, when the score difference is greater than acceptante criteria an error is raised
After checking out the repo, run bin/setup to install dependencies. You can also run bin/console for an interactive prompt that will allow you to experiment.
To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and tags, and push the .gem file to rubygems.org.
Bug reports and pull requests are welcome on GitHub at https://github.com/[USERNAME]/image_comparable. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the Contributor Covenant code of conduct.
The gem is available as open source under the terms of the MIT License.