public void CreatingNewTrackerWithNullShareFails()
{
Assert.Throws<ArgumentNullException>(() =>
{
using (ShareTracker tracker = new ShareTracker(null))
{
}
});
}
public void CreatingNewTrackerWithValidShareInitializesEmptyClientList()
{
using (ShareTracker tracker = new ShareTracker(new Share
{
ShortCode = "SOL"
}))
{
Assert.Equal(0, tracker.Clients.Count);
}
}
public void TrackerExposesInstantiatedShareAsAProperty()
{
Share sasol = new Share()
{
ShortCode = "SOL"
};
using (ShareTracker tracker = new ShareTracker(sasol))
{
Assert.True(tracker.Share == sasol);
}
}
public void NewTrackerStartsPollForNewPrices()
{
Share sasol = new Share()
{
ShortCode = "SOL",
LastTradePrice = -1
};
using (ShareTracker tracker = new ShareTracker(sasol, 1))
{
System.Threading.Thread.Sleep(25);
Assert.NotEqual(-1, tracker.Share.LastTradePrice);
}
}
public PriceDTO ListenForPriceChanges(string shortCode)
{
ShareTracker tracker = null;
// Check if already listening to updates for that code
if (!SharesTracked.ContainsKey(shortCode))
{
lock (_shareLock)
{
if (!SharesTracked.ContainsKey(shortCode))
{
var share = new Repository().GetPriceForShare(shortCode);
tracker = new ShareTracker(share);
SharesTracked.Add(shortCode, tracker);
// Subscribe to trades
tracker.TradeOccurred += tracker_TradeOccurred;
}
}
}
tracker = SharesTracked[shortCode];
if (!tracker.Clients.Contains(Context.ConnectionId))
{
// Add client ID to that code's set of listeners
tracker.Clients.Add(Context.ConnectionId);
}
// Add client to that broadcast group
Groups.Add(Context.ConnectionId, shortCode);
// Get current price and return
return new PriceDTO
{
LastTradePrice = tracker.Share.LastTradePrice,
ShortCode = tracker.Share.ShortCode,
TradeVolume = tracker.Share.TradeVolume
};
}
public void TrackerExposesPriceUpdatedEventWhichNotifiesOfUpdatedPrices()
{
Share sasol = new Share
{
ShortCode = "SOL",
LastTradePrice = -1
};
using (ShareTracker tracker = new ShareTracker(sasol, 1))
{
var eventOccured = false;
tracker.TradeOccurred += (s, e) =>
{
eventOccured = true;
};
System.Threading.Thread.Sleep(25);
Assert.True(eventOccured);
}
}
