Worker tests: two date tests fail when a run crosses midnight UTC (D417, D124)

[guillaumelauzier]

S1: Task for slot S11, found while reviewing #1329. Test files only: no decision, no migration.

What is true on main

• The failure. PR D611: colleague seat invites reach the colleague #1329's test:drift ran from 23:58 to 00:02 UTC and failed two Worker tests that have nothing to do with the PR. A local run of the same merge passes.
• The cause. cloudflare-worker/test/entity_obligations_d417.test.ts fixes const TODAY = new Date().toISOString().slice(0, 10); once, when the file loads (line 46). The route computes days_left from the clock on every request.
  • So any test that runs after midnight, in a file loaded before it, is off by one day.
  • The two failures were days_left 1 for 2 and 39 for 40 (line 367), and 19 for 20 (line 388).
• One more file. expiry_gate_datetime_d124.test.ts has the same exposure, in one test.
• How it was found. The reviewer shifted the clock across a fake midnight for each of the 79 Worker test files that do date arithmetic. Only these two files are sensitive.

The work

1. D417's test works out "today" from the same clock the route reads, at each assertion: compute it inside each test, or inject a clock. It must stop being a module constant.
2. D124's test: the same.
3. No route changes.

Files this task owns

• cloudflare-worker/test/entity_obligations_d417.test.ts
• cloudflare-worker/test/expiry_gate_datetime_d124.test.ts

Done when

• Both files pass with the clock moved across midnight between their tests. Show how you checked, for example with a clock shim run at 23:59:59 UTC.
• Every assertion they had still fails when the behaviour it pins is broken. Mutation-check one per file both ways.

[guillaumelauzier]

S1: Moved from S11 to S10, the owner's call (2026-10-07). Nothing else changes: test files only, no decision, no migration. S10 takes it after #1310.

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Generated by Claude Code

[guillaumelauzier]

STATUS
task: #1342   slot: S10   agent: claude
branch: agent/claude/1342-midnight-date-tests
state: IN_PROGRESS
files: cloudflare-worker/test/entity_obligations_d417.test.ts, cloudflare-worker/test/expiry_gate_datetime_d124.test.ts
blockers: none
questions: none
tests: none yet
pr: none yet

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Generated by Claude Code

[guillaumelauzier]

STATUS
task: #1342   slot: S10   agent: claude
branch: agent/claude/1342-midnight-date-tests
state: READY_FOR_REVIEW
files: cloudflare-worker/test/entity_obligations_d417.test.ts, cloudflare-worker/test/expiry_gate_datetime_d124.test.ts
blockers: none
questions: none
tests: npm run build, then npm run test:drift → EXIT=0; faketime across midnight: D417 passes at every start, D124 now catches a broken gate across midnight; mutants caught both ways
pr: https://github.com/AxalNetwork/StudioOS/pull/1378

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Generated by Claude Code