I actually needed the version that destroys tables, therefore
I ended up writing a mock null cache. This code is currently unused
but will probably be handy at some point.
PHPBB3-10972
The mock cache has instrumentation methods and therefore is non-trivial
to implement. For those times when we don't care that the cache caches,
null cache is a simpler implementation.
PHPBB3-10972
Two first simple tests to check functionality of session_begin and
session_create.
Added a mock class for the cache as well as a subclass of session
which has its cookie handling function mocked out to avoid header
sending problems.
PHPBB3-9732
