[webkit-gtk] How to run test case in Webkit/Gtk release source

[simon]

Hi list,

In Webkit trunk, test case can be running by:
/WebKitTools/Scripts/run-javascriptcore-tests --release --gtk
./WebKitTools/Scripts/run-webkit-tests --no-launch-safari --no-new-test-results --no-sample-on-timeout --results-directory layout-test-results --use-remote-links-to-tests --debug --root=WebKitBuild/bin'
How come source from http://webkitgtk.org/ doesn't include those test case?
Is there any way i can get those test case running in webkitgtk source?

BR,
Simon