Unit Test Generation Framework

Unit test generation fails when tests are written after the implementation to achieve coverage metrics — tests that describe what the code currently does rather than what it should do. Tests written this way pass by mirroring the implementation's behavior, including its bugs. Tests written before or alongside the implementation specify behavior and catch deviations from it, including regressions introduced by later changes.

The Unit Test Generation Framework produces test suites that specify behavior completely — happy path, error conditions, edge cases, and boundary values — and verifies the right thing at the right level of abstraction.