test: count visitors against a firing summary schedule

[hughgrigg]

Yulin 1.20.14 carries the shims KensioSoftware/yulin#1082 asked for. sim-athena-binary-shims registers Trino's hashing functions and the binary encodings that feed them, and sim-athena-count-distinct covers count(DISTINCT <expression>). Between them the shipped visitor count runs under the simulated Athena engine, and the deployment in src/cdk/rollup-summaries.test.ts drops viewsOnly for pageviews as Rainlytics ships it. Every delivered record now carries an address of its own. One new case fires the hourly schedule over three views from two addresses and reads a summary back saying three views and two visitors. That is the whole path from a firing schedule through Glue, Athena and the salt in Parameter Store to a visitors field on an object in the bucket. Another case points the deployment at a parameter nobody created and finds the run failed naming it, with no query execution behind it.

Resolves #88

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• Full check with pnpm run check passed

• Rebased off latest main

• User-facing behaviour is documented in docs/

Summary by CodeRabbit

• Tests

  • Expanded rollup summary coverage to verify distinct visitor counting.
  • Added validation for missing visitor-salt configuration.
  • Updated deployment scheduling tests to use the default visitor-counting setup.

• Chores

  • Updated the development tooling dependency.

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• src/cdk/rollup-summaries.test.ts

📝 Walkthrough

Walkthrough

The simulated rollup tests now use the default visitor-counting pageviews rollup. Test records include client IP addresses. Assertions cover distinct visitor counts and failure when the visitor salt is unavailable. The Yulin development dependency is updated to 1.20.14.

Changes

Visitor count schedule coverage

Layer / File(s)	Summary
Deployment defaults and simulator support package.json, src/cdk/rollup-summaries.test.ts	The tests use Yulin 1.20.14 and the deployment’s default visitor-counting rollup. The unused viewsOnly fixture and related documentation are removed.
Visitor-counting records and assertions src/cdk/rollup-summaries.test.ts	Test records include generated client IP addresses. Assertions verify three views, two distinct visitors, and failure before Athena or summary writes when the visitor salt is missing.

Estimated code review effort: 2 (Simple) | ~10 minutes

Merge Risk: 🔵 Low · up to 7c2f7

The PR is mergeable with owner awareness that the visitor-count test uses random addresses and can occasionally fail because two records may receive the same address; using deterministic or unique addresses should be followed up to keep the test reliable.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly summarizes the primary change: testing visitor counts through a firing summary schedule. It is concise and uses a conventional commit prefix.
Description check	✅ Passed	The description covers the implementation, linked issue, test scenarios, and all required checklist items. It is more detailed than the concise template requests, but it is complete and relevant.
Linked Issues check	✅ Passed	The changes satisfy issue #88: Yulin is updated to 1.20.14, the default visitor-counting rollup is tested through a firing schedule, repeated and distinct addresses are covered, missing visitor-salt f…
Out of Scope Changes check	✅ Passed	The dependency update and rollup summary test changes directly support the linked issue objectives. No unrelated changes are identified.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 1…

Full details: Linked Issues check

Explanation

The changes satisfy issue #88: Yulin is updated to 1.20.14, the default visitor-counting rollup is tested through a firing schedule, repeated and distinct addresses are covered, missing visitor-salt failure is tested before query execution, and viewsOnly is removed.

Full details: Docstring Coverage

Explanation

No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 1 files. (1 skipped: 1 unsupported.)

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
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• Create PR with unit tests
• Commit unit tests in branch test/visitor-count-end-to-end

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Inline comments:
In `@src/cdk/rollup-summaries.test.ts`:
- Around line 122-128: Update the visitor-counting test fixtures around the
returning and third records to use deterministic, distinct IPv4 addresses
instead of independent faker.internet.ipv4() calls, ensuring the assertion
consistently represents two unique visitors.

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