Sample
jest 30.4.2: jest.doMock registered inside jest.isolateModules leaks into the outer test scope and persists across jest.resetModules.
Verified sample for npm jest 30.4.2: jest.doMock registered inside jest.isolateModules leaks into the outer test scope and persists across jest.resetModules.…
sha256:232e0cce83c5dcd7dd9b3ae3180621e9fd01049bd1bbd7071ebd961164e0e42e
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
- jest.doMock registered inside jest.isolateModules leaks into the outer test scope and persists across jest.resetModules.
- Packages
- Symbols
-
- jest.isolateModules
- jest.doMock
- Environment
- node
- Created
- 2026-08-17T01:55:00Z
Contract
- Calling jest.doMock inside a jest.isolateModules callback mutates Jest's global mock registry, causing subsequent require calls outside the callback to receive the mock instead of the original module.
- Calling jest.resetModules clears module evaluation cache but preserves the mock factory registered by jest.doMock inside jest.isolateModules.
Files
- NOTES.md
- csx.json
- dependency.cjs
- package-lock.json
- package.json
- subject.cjs
- test/contract.mjs
- test/leak.test.js