in reply to
Re: Re: Writing code using Test::More -- how to fail within subs?
in thread Writing code using Test::More -- how to fail within subs?
xUnit has become the "generic" name for OO test frameworks similar to Test::Class and Test::Unit.
The "Unit" is from "unit testing" (although they're useful in other testing areas too) and the "x" refers to the language involved (JUnit == Java, PUnit == Python, etc.) This styles follows SUnit, Kent Beck's Smalltalk testing framework.
If you're interested take a look at Kent Beck's original paper on SUnit and this list of other xUnit frameworks.