Why 100% Line Coverage is a Dangerous Lie (And How We Made Python Mutation Testing Run in Seconds)

Описание и применение

DeployProof ускоряет мутационное тестирование Python до 2–4 секунд, автоматически генерирует недостающие утверждения и добавляет семь проверочных ворот, позволяя разработчикам выявлять логические ошибки до отправки кода.

Задача

High line coverage can mask logic bugs because tests may execute code without asserting correct behavior, especially when AI-generated boilerplate tests are used.

Результат

DeployProof reduces mutation testing latency from minutes to seconds, automatically fixes assertion gaps, and adds seven deterministic verification gates, enabling developers to catch logic bugs before code is pushed.

Рабочий процесс

• 1. Install DeployProof via pipx or pip.
• 2. Run deployproof check on the current git diff to perform mutation testing and other gates.
• 3. If mutants survive, run deployproof check --heal-tests to auto‑generate missing pytest assertions.
• 4. Optionally review synthesized tests in interactive mode with deployproof check -i.
• 5. Commit and push; DeployProof’s pre‑push hook ensures all gates pass before code reaches CI.

Доказательства

DeployProof drops the feedback loop down to 2 to 4 seconds.

Источник

DeployProof analyzes the surviving AST mutation, infers parameter types, and auto‑synthesizes a ready‑to‑run pytest test case.

Источник