Growing Object-Oriented Software, Guided by Tests

Chapter 18. Filling In the Details

In which we introduce a stop price so we don’t bid infinitely, which means we can now be losing an auction that hasn’t yet closed. We add a new field to the user interface and push it through to the Sniper. We realize we should have created an Item type much earlier.

A More Useful Application

So far the functionality has been prioritized to attract potential customers by giving them a sense of what the application will look like. We can show items being added and some features of sniping. It’s not a very useful application because, amongst other things, there’s no upper limit for bidding on an item—it could be very expensive to deploy.

This is a common pattern when using Agile Development techniques to work ...