public void NotifiesAuctionLostWhenAuctionCloses()
{
sniperListener.Expects.One.Method(x => x.AuctionLost());
IAuction nullAuction = null;
var auctionSniper = new Domain.AuctionSniper(sniperListener.MockObject, nullAuction);
auctionSniper.AuctionClosed();
}