public function dequeue() { if ($this->_c === 0) { throw new TInvalidOperationException('queue_empty'); } else { --$this->_c; return array_shift($this->_d); } }
public function testCanNotDequeueAnEmptyQueue() { $queue = new TQueue(); try { $item = $queue->dequeue(); } catch (TInvalidOperationException $e) { return; } self::fail('An expected TInvalidOperationException was not raised'); }