Need to compare 2 html documents using Java & selenium

Question

I have to check the differences between two html pages: One is an old version and the other is the updated page.

I need Selenium to get the source of the two pages a

Answer 1

Use selenium.getHtmlSource() for each page and either compare the returned Strings in Java or save them to files and use a command line tool such as "diff".

If using Java, two methods I can think of are using something like StringUtils.difference() (almost certainly a mess) or better yet Google Diff. Google diff has a Java library and test example.

Of course the outputs of these will be a literal diff, you might want something more custom to make sense of changes in HTML.