Computer Science / Unit 9 CS 0491 short lesson, about 20 seconds
The Regression Suite
Captions available
The idea
Unit tests accumulate into a regression suite — rerun after each source change to verify nothing existing broke — turning every past requirement into a standing guard.
In practice
A rectangle-area function's tests keep vouching for it years after anyone thought about rectangles.
Where people slip
The suite is only as honest as its coverage.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
Builds on
Unlocks
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