# Running the Doctrine 2 Testsuite## Setting up a PHPUnit Configuration XML..## Testing Lock-SupportThe Lock support in Doctrine 2 is tested using Gearman, which allows to run concurrent tasks in parallel.Install Gearman with PHP as follows:1. Go to http://www.gearman.org and download the latest Gearman Server2. Compile it and then call ldconfig3. Start it up "gearmand -vvvv"4. Install pecl/gearman by calling "gearman-beta"You can then go into tests/ and start up two workers: php Doctrine/Tests/ORM/Functional/Locking/LockAgentWorker.phpThen run the locking test-suite: phpunit --configuration <myconfig.xml> Doctrine/Tests/ORM/Functional/Locking/GearmanLockTest.phpThis can run considerable time, because it is using sleep() to test for the timing ranges of locks.