OpticalDiff

This gem can check whether HTMLs are optically the same or not by ignoring specified html elements by parsing input as HTML.

Installation

Add this line to your application's Gemfile:

gem 'optical_diff'

And then execute:

$ bundle

Or install it yourself as:

$ gem install optical_diff

Usage

Ignore specified html element by css selector or xpath

html1 = "<html><body>text</body></html>"
html2 = "<html><body>text<p class = 'random_text'>qwerty</p></body></html>"
diff = OpticalDiff.diff(html1, html2, :ignore => %w(p.random_text'))
diff.changed? #=> false

Replace text

html1 = "<html><body><a href='/link?abcde'>text</a></body></html>"
html2 = "<html><body><a href='/link?fghij'>text</a></body></html>"
diff = OpticalDiff.diff(html1, html2, :replace => [[/\?.+?'/, "'"]])
diff.changed? #=> false

:replace is always processed before :ignore

Contributing

Fork it
Create your feature branch (git checkout -b my-new-feature)
Commit your changes (git commit -am 'Added some feature')
Push to the branch (git push origin my-new-feature)
Create new Pull Request

optical_diff