/**
  * @depends testGet
  * 
  * @return void
  */
 public function testUnsetValue()
 {
     $value = 'all-p2p';
     $this->util->setMenu('/ip/firewall/filter');
     $id = $this->util->add(array('comment' => 'API TESTING', 'p2p' => $value, 'action' => 'passthrough', 'chain' => 'forward'));
     $targetBefore = $this->util->get($id, 'p2p');
     $this->util->unsetValue($id, 'p2p');
     $targetAfter = $this->util->get($id, 'p2p');
     $this->util->remove($id);
     $this->assertSame($value, $targetBefore);
     $this->assertNull($targetAfter);
 }