Framework for Integrated Test

Framework for Integrated Test, or "Fit", is an open-source (GNU GPL v2) tool for automated customer tests. It integrates the work of customers, analysts, testers, and developers.

Customers provide examples of how their software should work. Those examples are then connected to the software with programmer-written test fixtures and automatically checked for correctness. The customers' examples are formatted in tables and saved as HTML using ordinary business tools such as Microsoft Excel. When Fit checks the document, it creates a copy and colors the tables green, red, and yellow according to whether the software behaved as expected.

Fit was invented by Ward Cunningham in 2002. He created the initial Java version of Fit. As of June 2005, it has up-to-date versions for Java, C#, Python, Perl, PHP and Smalltalk.

Although Fit is an acronym, the word "Fit" came first, making it a backronym. Fit is sometimes italicized but should not be capitalized. In other words, "Fit" and "Fit" are appropriate usage, but "FIT" is not.

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