Test-Driving JavaScript Applications

The Fruits of Our Efforts

Code is written once but is changed several times over the lifetime of any nontrivial application. The membership package, in that popular video-on-demand system, went into production last year. But the company now wants the package to manage multi-month subscriptions and automated renewals. That royalty payment package at the record company needs upgrading to integrate with a new third-party electronic payment system. That tax filing software better handle correctly the last-minute changes to the tax laws. The list goes on.

Relevant and useful applications change constantly. That’s one reason why “Embrace Change” is a key principle behind eXtreme Programming (XP). That’s also the reason why “Responding to ...