MockArraySessionStorage mocks the session for unit tests.
No PHP session is actually started since a session can be initialized and shutdown only once per PHP execution cycle.
When doing functional testing, you should use MockFileSessionStorage instead.
@author Fabien Potencier <fabien@symfony.com> @author Bulat Shakirzyanov <mallluhuct@gmail.com> @author Drak <drak@zikula.org>
Expanded class hierarchy of MockArraySessionStorage