public void GetWinningBidForItemWithoutItemIdThrowsException(string itemId)
{
BidRepository repo = new BidRepository();
BidTracker tracker = new BidTracker(repo);
var ex = Assert.Throws <ArgumentNullException>(() => tracker.GetWinningBid(itemId));
Assert.Contains("An item id must be specified.", ex.Message);
}
public void GetWinningBidWhenThereAreNoBidsReturnsNull()
{
BidRepository repo = new BidRepository();
repo.Items.Add(new Item("item1", "name1"));
BidTracker tracker = new BidTracker(repo);
Bid bid = tracker.GetWinningBid("item1");
Assert.Null(bid);
}
public void GetWinningBidReturnsSuccessfully()
{
BidRepository repo = new BidRepository();
repo.Items.Add(new Item("item1", "name1"));
repo.Bids.Add(new Bid("bid1", "item1", "user1", 2));
repo.Bids.Add(new Bid("bid2", "item1", "user2", 4));
repo.Bids.Add(new Bid("bid3", "item1", "user3", 3));
BidTracker tracker = new BidTracker(repo);
Bid bid = tracker.GetWinningBid("item1");
Assert.NotNull(bid);
Assert.Equal("item1", bid.ItemId);
Assert.Equal(4, bid.Amount);
Assert.Equal("user2", bid.UserId);
Assert.Equal("bid2", bid.Id);
}
public void GetWinnigBidForNonExistingItemThrowsException()
{
BidRepository repo = new BidRepository();
BidTracker tracker = new BidTracker(repo);
InvalidBidException exception = Assert.Throws <InvalidBidException>(() => tracker.GetWinningBid("item1"));
Assert.Equal("An item with id 'item1' does not exist.", exception.Message);
}