The Symfony2:ref:`Profiler<internals-profiler>` gathers a lot of data for

each request. Use this data to check the number of database calls, the time

spent in the framework,... But before writing assertions, enable the profiler

spent in the framework,etc. But before writing assertions, enable the profiler

and check that the profiler is indeed available (it is enabled by default in

the ``test`` environment)::