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());
$expectedCreated = $this->entity->getCreatedAt();
$expectedUpdated = $this->entity->getUpdatedAt();
$this->entity->prePersist();
$this->assertSame($expectedCreated, $this->entity->getCreatedAt());
$this->assertSame($expectedUpdated, $this->entity->getUpdatedAt());
}