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Unit Tests Are Worth the Investment

Lessons Learned

 Over a year ago we stumbled upon the XP web page and applied two of the concepts espoused at that time: pair programming and automated unit testing. We were drawn initially to try the automated unit testing. I would like to report that the unit testing effort has returned huge dividends. We implemented Kent Beck's Simple Smalltalk Testing: With Patterns approach and implemented a "killer" user interface to organize, initiate tests and collect results. The initial effort and learning curve was well worth the time investment. We have a dramatic increase in quality and an associated decrease in the overall test, find & fix intervals.

Mark Bradac
Lucent Technologies

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