The V-Model: Pairing Every Development Step with a Test Level
In the V-Model testing isn't done last, it's designed on the left arm: requirements pair with acceptance tests, system design with system tests, architecture with integration tests, module design with unit tests. We tie Bookstore's 14-day return rule to its requirement with xUnit v3 traits, list the four tests of REQ-RET-01 with one command, and see in real test output which requirement a boundary bug breaks.
8 Nov 2026
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8 min
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6
