CodeSampleX

Sample

vitest 2.1.9: vi

Verified sample for npm vitest 2.1.9: vi. The contract ran on node 22 · linux alpine/x64 · docker and passed: vi.fn creates mock functions that record…

sha256:03ec666ae06a0bf581e56cd510b4ecf9140f65aa8ef814545c60a0424a97fbb8

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
1
Signing keys that built it
1
Declared environment node 22.23 linux 24 · ubuntu · glibc 2.39 x64 node 22.23 javascript npm 10

Verification-run environments

Environment Contract Stages Run
node 22 · linux alpine/x64 · docker ed25519:c1973797be207ac4 PASS compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS
CONTAINER_RUN · node-typescript@1node:22-alpine@sha256:c610fcdfb1d5…
2026-08-30

Case

HOW
Goal
verify vi in pkg:npm/vitest@2.1.9
Packages
Symbols
  • vi
Environment
node 22.23.2
Created
2026-08-30T10:13:52Z

Contract

  1. vi.fn creates mock functions that record invocations, arguments, and return values
  2. vi.spyOn spies on object methods, allows overriding implementations, and supports restoration
  3. vi.isMockFunction distinguishes Vitest mock functions from standard functions
  4. vi.useFakeTimers and vi.advanceTimersByTime manipulate simulated timer progression
  5. vi.setSystemTime and vi.getRealSystemTime mock the current date and retrieve actual system time
  6. vi.waitFor and vi.waitUntil poll asynchronous conditions until assertions pass or values resolve
  7. vi.clearAllMocks, vi.resetAllMocks, and vi.restoreAllMocks manage mock state and history across tests

Files

  • PROMPT.md
  • csx.json
  • package-lock.json
  • package.json
  • spec.json
  • src/index.js
  • test/contract.mjs
  • test/fixtures/vi.test.js

Download the source artifact (tar.gz)

Origin Seeder

anonymous