1..7
# ->initialize()
ok 1 - ->initialize() takes an array of options as its second argument
# ->getContent() ->setContent()
ok 2 - ->getContent() returns the current response content which is null by default
ok 3 - ->setContent() sets the response content
# ->sendContent()
ok 4 - ->sendContent() output the current response content
# ->serialize() ->unserialize()
ok 5 - sfResponse implements the Serializable interface
# New methods via sfEventDispatcher
ok 6 - __call() accepts new methods via sfEventDispatcher
ok 7 - __call() throws an exception if the method does not exist as a sfEventDispatcher listener
 Looks like everything went fine.