CodeSampleX

Sample

verify expect in pkg:npm/%40vitest/expect@2.1.9

sha256:d78d8125c86fe398fbe87d07a9b499b550d75472e89f716489bf9cfe08bce9f4

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…
2026-08-27

Case

HOW
Goal
verify expect in pkg:npm/%40vitest/expect@2.1.9
Packages
Symbols
  • expect
Environment
node 22.23.2
Created
2026-08-27T09:30:55Z

Contract

  1. expect performs strict primitive equality and .not inversion
  2. toEqual and toStrictEqual perform deep object and array structural equality assertions
  3. toMatchObject and toHaveProperty verify subset structures and nested object properties
  4. toContain and toContainEqual assert element presence and membership in arrays and strings
  5. toBeGreaterThan, toBeLessThan, and toBeCloseTo validate numeric relationships and floating point values
  6. toBeTypeOf and toSatisfy evaluate type classifications and custom predicate functions
  7. toThrow verifies exception throwing and error type matching
  8. Asymmetric matchers stringContaining, stringMatching, objectContaining, arrayContaining, any, and anything match partial values
  9. expect.extend registers custom matchers with custom pass and failure message logic
  10. getState and setState inspect and update matcher execution context

Files

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

Download the source artifact (tar.gz)

Origin Seeder

anonymous