TDD over 30 year old concept – Dijksta on TDD back in 1972?

TDD, Test-Driven Development has been here for a while since XP introduced it in the late 90’s. However, the concept is not that new. The great Edsger W. Dijkstra has written a few words on TDD as well, and it dates back to 1972 an his article “The Humble Programmer”.
“Today a usual technique is to [...]