public function testRemove()
{
/** @var NotificationInterface $notification */
$notification = $this->getMock(NotificationInterface::class);
$this->objectManager->expects($this->at(0))->method('remove')->with($notification);
$this->objectManager->expects($this->at(0))->method('flush');
$result = $this->mapper->remove($notification);
$this->assertTrue($result);
}