Each concept here is mapped to its prerequisites — the ideas you'd need first to understand it — all the way down to four foundations: Space, Time, Energy, Pattern. Click any prerequisite to drill down, or scroll for the chain graph.
External reference — all senses of the word “unit test” on Wiktionary. This atlas concept maps to only the slice of meaning relevant to the prerequisite graph.
Unit testing is a software testing practice that verifies individual components or functions in isolation, ensuring each piece works correctly before integration.
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