Prepare entity Manager

gistfile1.php

<?php
use Symfony\Component\Validator\ValidatorFactory;
use Doctrine\ORM\Mapping\Driver\AnnotationDriver;
use Doctrine\Common\Annotations\AnnotationReader;
use Doctrine\Common\Annotations\IndexedReader;


  /**
   * Prepare entity manager for testing LifeCycleCallbacks
   */
  protected function prepareEntityManager()
  {
    $conn = \Doctrine\DBAL\DriverManager::getConnection(array(
                'driver' => 'pdo_sqlite',
                'memory' => true
            ));

    $config = new \Doctrine\ORM\Configuration();
    $config->setAutoGenerateProxyClasses(true);
    $config->setProxyDir(\sys_get_temp_dir());
    $config->setProxyNamespace('JazzyTransactionTests\Entities');
    $config->setMetadataDriverImpl(new AnnotationDriver(new IndexedReader(new AnnotationReader())));
    $config->setQueryCacheImpl(new \Doctrine\Common\Cache\ArrayCache());
    $config->setMetadataCacheImpl(new \Doctrine\Common\Cache\ArrayCache());

    $params = array(
        'driver' => 'pdo_sqlite',
        'memory' => true,
    );

    $this->entityManager = \Doctrine\ORM\EntityManager::create($params, $config);

    $schemaTool = new \Doctrine\ORM\Tools\SchemaTool($this->entityManager);

    $classes = array(
        $this->entityManager->getClassMetadata("\Jazzy\TransactionBundle\Entity\MoneyTransaction"),
        $this->entityManager->getClassMetadata("\Jazzy\UserBundle\Entity\User"),
    );

    $schemaTool->dropSchema($classes);
    $schemaTool->createSchema($classes);
  }