Towards Spec-Driven Test Automation: Part 2
One real task, one real failure, the repair that followed, and the mistake I made writing the spec the first time. The test suite, written from criteria the coding agent never saw, required that row to be rejected. It was not:pythonE AssertionError: 'S005' was not rejectedThat line was everything the coding agent got back: which test failed and what it asserted, with no hint about the rule behind it.
- ▪One real task, one real failure, the repair that followed, and the mistake I made writing the spec the first time.
- ▪The test suite, written from criteria the coding agent never saw, required that row to be rejected.
- ▪It was not:pythonE AssertionError: 'S005' was not rejectedThat line was everything the coding agent got back: which test failed and what it asserted, with no hint about the rule behind it.
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| Original publisher | Towards Data Science |
| Canonical URL | https://towardsdatascience.com/towards-spec-driven-test-automation-part-2/ |
| Publication time | Wed, 30 Sep 2026 11:00:01 GMT |
| Retrieval time | 2026-09-30T11:02:01.890Z |
| Last seen | 2026-09-30T11:02:01.890Z |
| Headline source | Publisher (no WeSearch rewrite) |
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| Citation coverage | Summary is a WeSearch-generated derivative; primary citation is the original publisher URL. |
| Cluster | nWoXDAxkxYbX · 1 stories |
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| Publisher visit | Yes — open original |
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| Indexing | May the item be indexed (stored, ranked, made findable)? | Allowed |
| Snippet | May a short excerpt of the publisher's text be shown? | Allowed |
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| Retrieval / RAG | May the content be exposed for third-party retrieval-augmented generation? | Not asserted |
| Model training | May the content be used to train AI models? | Not asserted |
| Commercial reuse | May the content be reused commercially? | Not permitted |
Basis: Derived from the published RSS/Atom feed. Contact: [email protected]. Reviewed: 2026-07-24.
Opening excerpt (first ~120 words) tap to expand
Software EngineeringTowards Spec-Driven Test Automation: Part 2One run, and what it actually provesGal AravSeptember 30, 202612 min readTowards Spec-Driven Test Automation: Part 2 (Source: Claude Opus 5)One Run, and What It Actually ProvesIntroductionPart 1 of this series, "Why a green test suite can mean nothing", started from the golden rule I worked to on General Motors' Super Cruise and Ultra Cruise programs: the person who builds the system must never be the person who verifies it.
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Excerpt limited to ~120 words for fair-use compliance. The full article is at Towards Data Science.
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