Support phantomjs in mdk behat

[danpoltawski]

One day soon[1] we'll get the full Moodle suite passing using http://phantomjs.org and I imagine soon thereafter many of us will start using phantomjs for day to day behat development. It will hopefully be a bit faster, and also a bit less annoying (no java, don't have to worry about accidentally closing windows, fits better into cli toolchain etc).

It would be good if mdk behat supported phantomjs as well as selenium for that time.

Actually the process is fairly similar, the only difference is to download phantomjs and start that rather than selenium. e.g.

phantomjs --webdriver=4444

[1] https://tracker.moodle.org/browse/MDL-41030

[danpoltawski]

Please make it automatically add --tags '@_only_local&&@_switch_window' too (and output a notice that its doing it when using phantom)

[damyon]

+1