public void BidAddedWithInvalidAmountThrowsException(decimal bidAmount)
{
BidRepository repo = new BidRepository();
BidTracker tracker = new BidTracker(repo);
var ex = Assert.Throws <ArgumentException>(() => tracker.AddBid("item1", bidAmount, "user1"));
Assert.Contains("The bid amount must be greater than 0.", ex.Message);
}
public void BidAddedWithoutUserIdThrowsException(string userId)
{
BidRepository repo = new BidRepository();
BidTracker tracker = new BidTracker(repo);
var ex = Assert.Throws <ArgumentNullException>(() => tracker.AddBid("item1", 1, userId));
Assert.Contains("A user id must be specified.", ex.Message);
}
public void UserCanCreateBidSuccessfully()
{
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", 3));
BidTracker tracker = new BidTracker(repo);
Bid bid = tracker.AddBid("item1", 5, "user3");
Assert.Equal(3, repo.Bids.Count);
// Retrieve the newly created bid and check its values.
Bid newBid = repo.Bids.Single(b => b.Id == bid.Id);
Assert.Equal(5, newBid.Amount);
Assert.Equal("item1", newBid.ItemId);
Assert.Equal("user3", newBid.UserId);
}
public void BidLowerThanWinningBidThrowsException()
{
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", 3));
BidTracker tracker = new BidTracker(repo);
InvalidBidException exception = Assert.Throws <InvalidBidException>(() => tracker.AddBid("item1", 1, "user3"));
Assert.Equal("Bid too low. The current highest bid is 3.", exception.Message);
}
public void BidAddedToNonExistingItemThrowsException()
{
BidRepository repo = new BidRepository();
BidTracker tracker = new BidTracker(repo);
InvalidBidException exception = Assert.Throws <InvalidBidException>(() => tracker.AddBid("item1", 1, "user1"));
Assert.Equal("An item with id 'item1' does not exist.", exception.Message);
}