This shifts the behat test run to be triggered form composer activity
within the framework module directly,
* silverstripe/serve is used to provide a webserver, based on the
php -S command
* se/selenium-server-standalone is used to install selenium rather than
a download command
Because we’re using serve, the behat configuration can be locked down.
Further refinements could be made on this:
* the behat-extension could be responsible for installing and
starting/stopping selenium, making these tests more portable
* xvfb initialisation could be provided with another bin tool in the
begat-extension: vendor/bin/xvfb 1024x768
* The bootstrap-file argument to serve could be provided as part of a
composer.json setting. This would make it easier for developers to
start a dev server simply by running vendor/bin/serve
* the behat-extension could be responsible for installing and
starting/stopping silverstripe/serve, removing the need for
specifying base_url at all, and possibly utilising the same bootstrap
file between serve and behat.
