Doing a diff of two different html documents turns out to be an entirely different problem than simply doing a diff of plain text. For example, if I do a naive LCS diff between:
the diff result is NOT:
I've tried most gems out there that claim to be html diff but all of them seem to be just implementing text based LCS diff. Is there any gem that does a diff while taking html tags into account?
preguntado el 01 de febrero de 12 a las 14:02
After much searching for a gem to do this for me, I discovered that I can simply do a string compare between two parsed Nokogiri documents:
def should_match_html(html_text1, html_text2) dom1 = Nokogiri::HTML(html_text1) dom2 = Nokogiri::HTML(html_text2) dom1.to_s.should == dom2.to_s end
Then you can simply add this in your spec:
should_match_html expected_html, actual_html
The best part is that the built-in rspec matcher will automatically provide you a line-by-line diff result of the mismatched lines.