Re: Replacing Test::WWW::Selenium::Catalyst with Gtk3::WebKit

On Tuesday 22 November 2011 18:00:28 Emmanuel Rodriguez wrote:

Aah...finally I got the request to succeed. As it turns out,
HTTP::Response::as_string returns a fine HTTP response, except for the
leading "HTTP/1.0". If I add that manually, libsoup seems to like the

I'm glad to see that it's working.

Unfortunately I still had to give up the whole answer-in-process route. Though 
I could make it create working requests to my HTTP echo server, I was unable 
to access the request body which made anything but simple GET requests fail.

On the other hand I have made great progress with just forking out a Catalyst 
server and accessing that just like Test::WWW::Selenium::Catalyst does. The 
for me crucial improvement is, that I use a random port and retry with a 
different if this port is already used. This allows me to run tests reliably in 
parallel, speeding up our test suite.
I looked quickly at your code and I have a few suggestions/comments.

Most the JS calls that you're doing can be rewritten in perl. WebKit
exposes a lot of it's API and it's not needed to use JS to manipulate
its DOM.

Thanks for this hint. I converted most of the JS code to Perl and while it 
took me quite a while to get it right, it now works better than the original 

The same cound be done with click_ok() you should be able to get the
DOM element from perl and to send a click event. I haven't tried it
yet, if you do let me know.

This is where things get ugly. Unfortunately, Webkit's event generating 
functions are very limited. I can generate the click event but things like 
simple KeyPress events are a real problem. I can generate the KeyboardEvent 
but the keycode is always 0. This is a known bug in Webkit and does not even 
work in JavaScript. So there's actually no way to synthesize keyboard events.

So my new approach is to generate a key event at Gtk3 level and send it to the 
Webkit widget. After all this would be even more realisitc. But again this is 
quite difficult. There is a Gtk3::Gdk::Event class available, but no 
Gtk3::Gdk::Event::Key or Gtk3::Gdk::EventKey or anything like that. From 
reading the .gir file the latter should exist, but it just doesn't. If it's 
missing in the bindings, how could I add it? And even if I could create it, I 
still don't know how to actually set the keycode field in the struct. There's 
pretty much no documentation and lot's of guess work on how Perl maps to 

If you don't want to have a window around you can create an off screen
window instead of a real window. This works like a normal window
except that you don't see it. Sample:

my $window = Gtk3::OffscreenWindow->new();

You can find some sample perl programs that use WebKit in my git repo, I hope that it helps.

Thanks. Your examples have been of great value in this adventure :)

Again attaching the current state for those interested. I probably should put 
this stuff into a public repo :)


Description: Perl program

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