Yagni ("You Aren't Gonna Need It") is the principle that we should not build presumptive features. It should not be used as a justification for neglecting internal quality.| martinfowler.com
The XUnit family of testing tools have their origin in Kent Beck's seedwork built in Smalltalk. JUnit's first version was written by Kent and Erich Gamma on a flight to OOPSLA 97.| martinfowler.com
My #2 problem with arguing testing pyramids vs honeycombs is the disparate definitions of unit test| martinfowler.com