CodeSampleX

Sample

verify pkg:npm/%40vitest/spy@4.1.11

sha256:a6c554933ccfe3921c9827e9ecd442480567abe285aea98c9493eca5ac3c23f0

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…
2026-08-28

Case

HOW
Goal
verify pkg:npm/%40vitest/spy@4.1.11
Packages
Symbols
  • fn
  • isMockFunction
  • spyOn
Environment
node 22.23.2
Created
2026-08-28T06:22:46Z

Contract

  1. fn creates mock functions that record invocations, arguments, and return values
  2. fn defaults mock name to 'vi.fn()' and updates it with mockName
  3. fn supports mockImplementationOnce for one-time overrides and falls back to base implementation
  4. fn supports mockClear to reset call history without clearing implementation
  5. fn supports mockReturnValue, mockReturnValueOnce, mockResolvedValueOnce, and mockRejectedValueOnce
  6. spyOn wraps existing object methods and tracks invocations while delegating to original implementation
  7. spyOn mockImplementation overrides method behavior with custom handler
  8. spyOn mockRestore restores original method implementation and resets recorded calls
  9. spyOn intercepts getter and setter property accessors with restore support
  10. isMockFunction identifies mock functions and spy wrappers

Files

  • PROMPT.md
  • csx.json
  • package-lock.json
  • package.json
  • spec.json
  • test/contract.mjs

Download the source artifact (tar.gz)

Origin Seeder

anonymous