private void Market_order_partial_match_on_exchange_with_one_limit_order(Side side)
{
var quantityForLimitOrder = 2;
var quantityForMarketOrder = quantityForLimitOrder / 2;
var priceForLimitOrder = 10000;
var market = new Market(Currency.BTC, Currency.USD);
var otherSide = side.Other();
var limitOrder =
new LimitOrder(new OrderInfo(Guid.NewGuid(), side,
quantityForLimitOrder),
priceForLimitOrder);
foreach (var exchange in
LimitOrders.Limit_order_is_accepted_by_empty_exchange
(limitOrder, market))
{
var marketOrder = new OrderInfo(Guid.NewGuid(), otherSide, quantityForMarketOrder);
exchange.SendMarketOrder(marketOrder, market);
var btcUsdOrderBookAfterMatching = exchange[market];
Assert.That(btcUsdOrderBookAfterMatching[otherSide].Count(),
Is.EqualTo(0));
Assert.That(btcUsdOrderBookAfterMatching[side].Count(),
Is.EqualTo(1));
var limitOrderLeftAfterPartialMatch =
btcUsdOrderBookAfterMatching[side].Tip.Value;
Assert.That(limitOrderLeftAfterPartialMatch.OrderInfo.Side,
Is.EqualTo(side));
Assert.That(limitOrderLeftAfterPartialMatch.Price,
Is.EqualTo(limitOrder.Price));
Assert.That(limitOrderLeftAfterPartialMatch.OrderInfo.Quantity,
Is.EqualTo(quantityForLimitOrder - quantityForMarketOrder));
}
}
private void Market_order_throws_on_exchange_with_not_enough_liquidity_in_limit_orders_and_orderbooks_are_left_intact(Side side)
{
var quantityForLimitOrder1 = 1;
var quantityForLimitOrder2 = 1;
// to make the exchange run out of funds:
var quantityForMarketOrder = quantityForLimitOrder1 + quantityForLimitOrder2 + 1;
var priceForLimitOrder = 10000;
var market = new Market(Currency.BTC, Currency.USD);
var otherSide = side.Other();
var limitOrder1 =
new LimitOrder(new OrderInfo(Guid.NewGuid(), otherSide,
quantityForLimitOrder1),
priceForLimitOrder);
foreach (var exchange in
LimitOrders.Limit_order_is_accepted_by_empty_exchange
(limitOrder1, market))
{
var limitOrder2 =
new LimitOrder(new OrderInfo(Guid.NewGuid(), otherSide, quantityForLimitOrder2),
priceForLimitOrder);
LimitOrders.SendOrder(exchange, limitOrder2, market);
var marketOrder =
new OrderInfo(Guid.NewGuid(), side, quantityForMarketOrder);
Assert.Throws <LiquidityProblem>(() =>
{
exchange.SendMarketOrder(marketOrder, market);
});
var btcUsdOrderBookAfterException = exchange[market];
Assert.That(btcUsdOrderBookAfterException[side].Count(),
Is.EqualTo(0));
Assert.That(btcUsdOrderBookAfterException[otherSide].Count(),
Is.EqualTo(2));
var firstLimitOrderAfterException =
btcUsdOrderBookAfterException[otherSide].Tip.Value;
Assert.That(firstLimitOrderAfterException.OrderInfo.Side,
Is.EqualTo(otherSide));
Assert.That(firstLimitOrderAfterException.Price,
Is.EqualTo(limitOrder1.Price));
Assert.That(firstLimitOrderAfterException.OrderInfo.Quantity,
Is.EqualTo(limitOrder1.OrderInfo.Quantity));
var secondLimitOrderAfterException =
btcUsdOrderBookAfterException[otherSide].Tail.Value.Tip.Value;
Assert.That(secondLimitOrderAfterException.OrderInfo.Side,
Is.EqualTo(otherSide));
Assert.That(secondLimitOrderAfterException.Price,
Is.EqualTo(limitOrder2.Price));
Assert.That(secondLimitOrderAfterException.OrderInfo.Quantity,
Is.EqualTo(limitOrder2.OrderInfo.Quantity));
}
}
private void Market_order_matches_with_more_than_one_limit_order(Side side)
{
var quantityForLimitOrder1 = 1;
var quantityForLimitOrder2 = 1;
// to make the exchange run out of funds:
var quantityForMarketOrder = quantityForLimitOrder1 + quantityForLimitOrder2;
var priceForLimitOrder = 10000;
var market = new Market(Currency.BTC, Currency.USD);
var otherSide = side.Other();
var limitOrder1 =
new LimitOrder(new OrderInfo(Guid.NewGuid(), otherSide, quantityForLimitOrder1),
priceForLimitOrder);
foreach (var exchange in
LimitOrders.Limit_order_is_accepted_by_empty_exchange
(limitOrder1, market))
{
var limitOrder2 =
new LimitOrder(new OrderInfo(Guid.NewGuid(), otherSide, quantityForLimitOrder2),
priceForLimitOrder);
LimitOrders.SendOrder(exchange, limitOrder2, market);
var marketOrder =
new OrderInfo(Guid.NewGuid(), side, quantityForMarketOrder);
exchange.SendMarketOrder(marketOrder, market);
var btcUsdOrderBookAfterException = exchange[market];
Assert.That(btcUsdOrderBookAfterException[side].Count(),
Is.EqualTo(0));
Assert.That(btcUsdOrderBookAfterException[otherSide].Count(),
Is.EqualTo(0));
}
}
private void Market_order_exact_match_on_exchange_with_one_limit_order(Side side)
{
var quantity = 1;
var priceForLimitOrder = 10000;
var market = new Market(Currency.BTC, Currency.USD);
var otherSide = side.Other();
var limitOrder =
new LimitOrder(new OrderInfo(Guid.NewGuid(), side, quantity),
priceForLimitOrder);
foreach (var exchange in
LimitOrders.Limit_order_is_accepted_by_empty_exchange(limitOrder, market))
{
var marketOrder = new OrderInfo(Guid.NewGuid(), otherSide, quantity);
exchange.SendMarketOrder(marketOrder, market);
var btcUsdOrderBookAfterMatching = exchange[market];
Assert.That(btcUsdOrderBookAfterMatching[Side.Bid].Count(),
Is.EqualTo(0));
Assert.That(btcUsdOrderBookAfterMatching[Side.Ask].Count(),
Is.EqualTo(0));
}
}
