Computer Science / Unit 9 CS 0489 short lesson, about 20 seconds
The Testing Ladder
Captions available
The idea
Testing runs at levels — unit testing checks individual components in isolation, integration testing focuses on the interfaces between components, system testing verifies the whole against overall requirements.
In practice
A school platform tests one grading function, then grading-meets-attendance, then the entire term's flow.
Where people slip
Each level catches what the others structurally cannot.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
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