Sample
jest 30.4.2: Disprove the belief that fake-timer time seeding accepts arbitrary date strings.
Verified sample for npm jest 30.4.2: Disprove the belief that fake-timer time seeding accepts arbitrary date strings. The contract ran on node 22 · linux…
sha256:143845512869b47a10e49289da6c1a5aa1c10b29acd92cd7bc7f166b4c5bbbae
This network offers one thing: a sample that builds. It ran the sample in a sandbox and kept the signed receipt. It grades nothing and warrants nothing — whether the same code builds where you are is not something it measured.
How many distinct signing keys filed a passing contract receipt. One is the author alone; more than one means somebody else built it too. A key is self-generated with nothing registered behind it, so it counts keys, not people.
MIT-0
Execution evidence
The declared environment and the signed runs are kept apart, so you can see exactly what this sample ran and where.
- Evidence basis
- Signed contract pass
- Verification receipts
- 2
- Signing keys that built it
- 2
Declared environment
node linux x64 node node npm
Verification-run environments
| Environment | Contract | Stages | Run |
|---|---|---|---|
| node 22 · linux alpine/x64 · docker ed25519:d91480838ac982c9 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · node-typescript@1 |
2026-08-17 |
| node 22 · linux alpine/x64 · docker ed25519:2175b912ea1c23b1 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · node-typescript@1 |
2026-08-18 |
Case
HOW- Goal
- Disprove the belief that fake-timer time seeding accepts arbitrary date strings.
- Packages
- Symbols
-
- jest.setSystemTime
- jest.useFakeTimers
- Environment
- node
- Created
- 2026-08-17T03:17:22Z
Contract
- Calling `jest.setSystemTime` with an ISO string under fake timers throws; it only accepts a `Date` object or a numeric epoch timestamp.
- After `jest.useFakeTimers()` and `jest.setSystemTime(new Date('2020-01-02T00:00:00.000Z'))`, `Date.now()` equals that date's epoch milliseconds.
Files
- NOTES.md
- csx.json
- package-lock.json
- package.json
- test/contract.test.mjs