public void CanOpenPosition()
 {
     OrderTransaction trans = new OrderTransaction();
     trans.Symbol = "AAPL";
     trans.Direction = OrderDirection.Buy;
     OrderTransactionProcessor processor = new OrderTransactionProcessor();
     IPositionInventory openPosition = processor.OpenPosition(trans, PositionInventoryMethod.Fifo);
     processor.OpenPositions.Add(openPosition);
     Assert.IsTrue(processor.OpenPositions.Count > 0);
 }