For specification documents to be truly valuable, they need to give an accurate picture of all the requirements of a project. This article describes how the communication value of specification documents can be improved by permitting users to test the code under construction using the Framework for Integrated Test (FIT), an open-source tool. It also explains how you can build a Windows Forms application in C# (WinFITRunnerLite) that converts functional tests, as written by your customers using Excel, into a form that allows you to run them with FIT against the code you're developing.
MSDN Magazine February 2005
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