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Things like Mechanize and HTMLUnit are what I call "HTTP-only protocol drivers" and are not a true-fidelity simulation of the HTML+JavaScript environment. This is exactly the reason I created Selenium in the first place. I had regression bugs in IE and Mozilla that I needed to verify were fixed in the actual browsers. An emulated browser environment like Mechanize or HTMLUnit isn't a real browser that users actually use, so it doesn't solve the regression testing problem I had.

Best of both worlds these days is in driving a headless WebKit (a true browser driver that includes the JS interaction), which will be coming in Selenium 2.




Thanks, Selenium can replay user interaction sessions, but I need to set e.g. form fields programmatically, is that possible? Maybe CPAN/Gtk2::WebKit is also an option.


Yes, it is possible, and fairly routine in Selenium. Also, you can execute arbitrary Javascript for whatever else you may need.


you can even use your recorded sessions to spit out the code that you can then use as a template for your code




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