feat: Add Test Double (Meszaros) semantic anchor

[Nantero1]

Summary

• Adds Test Double (Meszaros) as a new semantic anchor
• Covers Gerard Meszaros' 5-type taxonomy from xUnit Test Patterns (2007)
• Includes anchor file, all-anchors include, and AgentSkill catalog entry

Why this anchor?

The catalog has London School TDD ("mock-heavy") and Chicago School TDD ("minimal mocking"), but neither defines what kind of double you're using. Meszaros' taxonomy is the canonical classification:

• Dummy — passed but never used
• Stub — canned responses, no verification
• Spy — records calls for later assertion
• Mock — pre-programmed expectations, verifies interactions
• Fake — working simplified implementation

This is orthogonal to both TDD schools: they define when/how much to use doubles, Meszaros defines what the double IS. London School TDD already mentions "test doubles (mocks, stubs)" in passing but never defines the taxonomy — this anchor fills that gap.

Files changed

• docs/anchors/test-double-meszaros.adoc — new anchor file
• docs/all-anchors.adoc — added include in Testing & Quality section
• skill/semantic-anchor-translator/references/catalog.md — added catalog entry

[coderabbitai]

Warning

Rate limit exceeded

@Nantero1 has exceeded the limit for the number of commits that can be reviewed per hour. Please wait 22 minutes and 5 seconds before requesting another review.

⌛ How to resolve this issue?

After the wait time has elapsed, a review can be triggered using the @coderabbitai review command as a PR comment. Alternatively, push new commits to this PR.

We recommend that you space out your commits to avoid hitting the rate limit.

🚦 How do rate limits work?

CodeRabbit enforces hourly rate limits for each developer per organization.

Our paid plans have higher rate limits than the trial, open-source and free plans. In all cases, we re-allow further reviews after a brief timeout.

Please see our FAQ for further information.

⚙️ Run configuration

Configuration used: Path: .coderabbit.yml

Review profile: CHILL

Plan: Pro

Run ID: 339924d1-05a2-4ac4-9cf6-8349bee772e5

📥 Commits

Reviewing files that changed from the base of the PR and between aefa0b4 and 77982ca.

📒 Files selected for processing (3)

• docs/all-anchors.adoc
• docs/anchors/test-double-meszaros.adoc
• skill/semantic-anchor-translator/references/catalog.md

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment

---

Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.

❤️ Share

• X
• Mastodon
• Reddit
• LinkedIn

_{Comment @coderabbitai help to get the list of available commands and usage tips.}

[raifdmueller]

Review: ✅ Excellent anchor, merge-ready.

Test Double (Meszaros) is a textbook semantic anchor. The Dummy/Stub/Spy/Mock/Fake taxonomy is exactly the kind of precise vocabulary that improves LLM communication — saying "use a Stub here, not a Mock" triggers fundamentally different behavior. The "vocabulary precision" concept is spot on.

Post-merge TODO:

• Add German translation (test-double-meszaros.de.adoc)

Merging recommended, translation will follow in batch (see #149).