public function testPrePersist()
{
$this->assertNull($this->entity->getCreatedAt());
$this->assertNull($this->entity->getUpdatedAt());
$this->entity->prePersist();
$this->assertInstanceOf('\\DateTime', $this->entity->getCreatedAt());
$this->assertInstanceOf('\\DateTime', $this->entity->getUpdatedAt());
$this->assertEquals('UTC', $this->entity->getCreatedAt()->getTimezone()->getName());
$this->assertEquals('UTC', $this->entity->getUpdatedAt()->getTimezone()->getName());
}