public void FindLevel_ShouldReturnCorrectValue()
{
var pair1 = "BTC/USD";
var pair2 = "ETH/BTC";
var data1 = GetOrderBookSnapshotMockData(pair1, 500);
var data2 = GetOrderBookSnapshotMockData(pair2, 200);
var data = data2.Concat(data1).ToArray();
var snapshot = new OrderBookLevelBulk(OrderBookAction.Insert, data, CryptoOrderBookType.L2);
var source = new OrderBookSourceMock(snapshot);
var orderBook = new CryptoOrderBookL2(pair1, source);
source.StreamSnapshot();
Assert.Equal(1000, orderBook.FindBidLevelByPrice(0)?.Amount);
Assert.Equal(1000, orderBook.FindBidLevelById("0-bid")?.Amount);
Assert.Equal(3000, orderBook.FindAskLevelByPrice(1000)?.Amount);
Assert.Equal(3000, orderBook.FindAskLevelById("1000-ask")?.Amount);
}
public async Task StreamingDiff_TwoPairs_ShouldHandleCorrectly()
{
var pair1 = "BTC/USD";
var pair2 = "ETH/USD";
var data1 = GetOrderBookSnapshotMockData(pair1, 500);
var data2 = GetOrderBookSnapshotMockData(pair2, 200);
var data = data2.Concat(data1).ToArray();
var snapshot = new OrderBookLevelBulk(OrderBookAction.Insert, data, CryptoOrderBookType.L2);
var source = new OrderBookSourceMock(snapshot);
var orderBook1 = new CryptoOrderBookL2(pair1, source)
{
DebugEnabled = true
};
var orderBook2 = new CryptoOrderBookL2(pair2, source)
{
DebugEnabled = true
};
source.StreamSnapshot();
source.StreamBulk(GetInsertBulkL2(
CreateLevel(pair2, 199.4, 50, CryptoOrderSide.Bid),
CreateLevel(pair2, 198.3, 600, CryptoOrderSide.Bid),
CreateLevel(pair2, 50.33, 3350, CryptoOrderSide.Bid),
CreateLevel(pair1, 500.2, 400, CryptoOrderSide.Ask),
CreateLevel(pair1, 503.1, 3000, CryptoOrderSide.Ask),
CreateLevel(pair1, 800.123, 1234, CryptoOrderSide.Ask),
CreateLevel(null, 101.1, null, CryptoOrderSide.Bid),
CreateLevel(null, 901.1, null, CryptoOrderSide.Ask)
));
source.StreamBulk(GetInsertBulkL2(
CreateLevel(pair1, 499.4, 50, CryptoOrderSide.Bid),
CreateLevel(pair1, 498.3, 600, CryptoOrderSide.Bid),
CreateLevel(pair1, 300.33, 3350, CryptoOrderSide.Bid),
CreateLevel(pair2, 200.2, 400, CryptoOrderSide.Ask),
CreateLevel(pair2, 203.1, 3000, CryptoOrderSide.Ask),
CreateLevel(pair2, 250.123, 1234, CryptoOrderSide.Ask)
));
source.StreamBulk(GetUpdateBulkL2(
CreateLevel(pair1, 499, 33, CryptoOrderSide.Bid),
CreateLevel(pair1, 450, 33, CryptoOrderSide.Bid),
CreateLevel(pair1, 501, 32, CryptoOrderSide.Ask),
CreateLevel(pair1, 503.1, 32, CryptoOrderSide.Ask),
CreateLevel(pair1, 100, null, CryptoOrderSide.Bid),
CreateLevel(pair1, 900, null, CryptoOrderSide.Ask)
));
source.StreamBulk(GetDeleteBulkL2(
CreateLevel(pair1, 0, CryptoOrderSide.Bid),
CreateLevel(pair1, 1, CryptoOrderSide.Bid),
CreateLevel(pair2, 0, CryptoOrderSide.Bid),
CreateLevel(pair2, 1, CryptoOrderSide.Bid)
));
source.StreamBulk(GetDeleteBulkL2(
CreateLevel(pair2, 400, CryptoOrderSide.Ask),
CreateLevel(pair2, 399, CryptoOrderSide.Ask),
CreateLevel(pair1, 1000, CryptoOrderSide.Ask),
CreateLevel(pair1, 999, CryptoOrderSide.Ask)
));
await Task.Delay(500);
Assert.NotEmpty(orderBook1.BidLevels);
Assert.NotEmpty(orderBook1.AskLevels);
Assert.Equal(501, orderBook1.BidLevels.Length);
Assert.Equal(501, orderBook1.AskLevels.Length);
Assert.Equal(201, orderBook2.BidLevels.Length);
Assert.Equal(201, orderBook2.AskLevels.Length);
Assert.Equal(499.4, orderBook1.BidPrice);
Assert.Equal(500.2, orderBook1.AskPrice);
Assert.Equal(199.4, orderBook2.BidPrice);
Assert.Equal(200.2, orderBook2.AskPrice);
Assert.Equal(33, orderBook1.FindBidLevelByPrice(499)?.Amount);
Assert.Equal(33, orderBook1.FindBidLevelByPrice(450)?.Amount);
Assert.Equal(32, orderBook1.FindAskLevelByPrice(501)?.Amount);
Assert.Equal(32, orderBook1.FindAskLevelByPrice(503.1)?.Amount);
var notCompleteBid = orderBook1.FindBidLevelByPrice(100);
Assert.Equal(CryptoPairsHelper.Clean(pair1), notCompleteBid.Pair);
Assert.Equal(1100, notCompleteBid.Amount);
Assert.Equal(3, notCompleteBid.Count);
var notCompleteAsk = orderBook1.FindAskLevelByPrice(900);
Assert.Equal(CryptoPairsHelper.Clean(pair1), notCompleteAsk.Pair);
Assert.Equal(2900, notCompleteAsk.Amount);
Assert.Equal(3, notCompleteAsk.Count);
Assert.Null(orderBook1.FindBidLevelByPrice(0));
Assert.Null(orderBook1.FindBidLevelByPrice(1));
Assert.Null(orderBook1.FindAskLevelByPrice(1000));
Assert.Null(orderBook1.FindAskLevelByPrice(999));
Assert.Null(orderBook1.FindBidLevelByPrice(101.1));
Assert.Null(orderBook1.FindAskLevelByPrice(901.1));
Assert.Null(orderBook2.FindBidLevelByPrice(101.1));
Assert.Null(orderBook2.FindAskLevelByPrice(901.1));
}
public async Task StreamingDiff_ShouldHandleCorrectly()
{
var pair = "BTC/USD";
var data = GetOrderBookSnapshotMockData(pair, 500);
var snapshot = new OrderBookLevelBulk(OrderBookAction.Insert, data, CryptoOrderBookType.L2);
var source = new OrderBookSourceMock(snapshot);
var orderBook = new CryptoOrderBookL2(pair, source);
source.StreamSnapshot();
source.StreamBulk(GetInsertBulkL2(
CreateLevel(pair, 499.4, 50, CryptoOrderSide.Bid),
CreateLevel(pair, 498.3, 600, CryptoOrderSide.Bid),
CreateLevel(pair, 300.33, 3350, CryptoOrderSide.Bid),
CreateLevel(pair, 500.2, 400, CryptoOrderSide.Ask),
CreateLevel(pair, 503.1, 3000, CryptoOrderSide.Ask),
CreateLevel(pair, 800.123, 1234, CryptoOrderSide.Ask),
CreateLevel(null, 101.1, null, CryptoOrderSide.Bid),
CreateLevel(null, 901.1, null, CryptoOrderSide.Ask)
));
source.StreamBulk(GetUpdateBulkL2(
CreateLevel(pair, 499, 33, CryptoOrderSide.Bid),
CreateLevel(pair, 450, 33, CryptoOrderSide.Bid),
CreateLevel(pair, 501, 32, CryptoOrderSide.Ask),
CreateLevel(pair, 503.1, 32, CryptoOrderSide.Ask),
CreateLevel(pair, 100, null, CryptoOrderSide.Bid),
CreateLevel(pair, 900, null, CryptoOrderSide.Ask)
));
source.StreamBulk(GetDeleteBulkL2(
CreateLevel(pair, 0, CryptoOrderSide.Bid),
CreateLevel(pair, 1, CryptoOrderSide.Bid),
CreateLevel(pair, 1000, CryptoOrderSide.Ask),
CreateLevel(pair, 999, CryptoOrderSide.Ask)
));
await Task.Delay(500);
Assert.NotEmpty(orderBook.BidLevels);
Assert.NotEmpty(orderBook.AskLevels);
Assert.Equal(501, orderBook.BidLevels.Length);
Assert.Equal(501, orderBook.AskLevels.Length);
Assert.Equal(499.4, orderBook.BidPrice);
Assert.Equal(500.2, orderBook.AskPrice);
Assert.Equal(33, orderBook.FindBidLevelByPrice(499)?.Amount);
Assert.Equal(33, orderBook.FindBidLevelByPrice(450)?.Amount);
Assert.Equal(32, orderBook.FindAskLevelByPrice(501)?.Amount);
Assert.Equal(32, orderBook.FindAskLevelByPrice(503.1)?.Amount);
var notCompleteBid = orderBook.FindBidLevelByPrice(100);
Assert.Equal(CryptoPairsHelper.Clean(pair), notCompleteBid.Pair);
Assert.Equal(1100, notCompleteBid.Amount);
Assert.Equal(3, notCompleteBid.Count);
var notCompleteAsk = orderBook.FindAskLevelByPrice(900);
Assert.Equal(CryptoPairsHelper.Clean(pair), notCompleteAsk.Pair);
Assert.Equal(2900, notCompleteAsk.Amount);
Assert.Equal(3, notCompleteAsk.Count);
Assert.Null(orderBook.FindBidLevelByPrice(0));
Assert.Null(orderBook.FindBidLevelByPrice(1));
Assert.Null(orderBook.FindAskLevelByPrice(1000));
Assert.Null(orderBook.FindAskLevelByPrice(999));
Assert.Null(orderBook.FindBidLevelByPrice(101.1));
Assert.Null(orderBook.FindAskLevelByPrice(901.1));
}