CodeSampleX

Sample

jest-validate 29.7.0: createDidYouMeanMessage

Verified sample for npm jest-validate 29.7.0: createDidYouMeanMessage. The contract ran on node 22 · linux alpine/x64 · docker and passed.

sha256:9c125ea51900e2f3a3153315c20a01c06b55e1e2869ed52c426166e2f7744de4

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@1		 2026-08-21

Case

HOW
Goal
verify jest-validate.createDidYouMeanMessage in pkg:npm/jest-validate@29.7.0
Packages
Symbols
  • jest-validate.createDidYouMeanMessage
Environment
node 22.23.2
Created
2026-08-21T04:56:33Z

Contract

  1. suggestOption returns formatted 'Did you mean "<suggestion>"?' message when unrecognized option has Levenshtein distance < 3 to an allowed option
  2. suggestOption returns an empty string when no allowed option is within Levenshtein distance < 3
  3. suggestOption selects the first matching suggestion when multiple allowed options are within distance threshold
  4. suggestOption handles exact match by returning did you mean suggestion with edit distance 0

Files

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

Download the source artifact (tar.gz)

Source

PROMPT.md
Clean-room public code sample — generation instructions

Write a brand-new, minimal, self-contained code sample in this clean-room directory.
Do not copy, paraphrase, or reference any existing project source. Work only from this spec.

A csx.json manifest scaffold already exists. Do not recreate it from memory. Preserve its case.goal, packages and symbols; fill its empty case.contract with exact assertions and correct its environment, commands and verifierAdapter for the files you generate.

Goal: verify jest-validate.createDidYouMeanMessage in pkg:npm/jest-validate@29.7.0
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/jest-validate@29.7.0
Demonstrate these symbols/APIs:
  - jest-validate.createDidYouMeanMessage
Constraints:
  - executionContext: node
Required runtime conditions:
  - ecosystem: npm
  - language: javascript
  - moduleSystem: cjs
  - packageManager: npm@10.9.8
  - runtime: node@22.23.2

Rules:
  - One focused purpose; the smallest project that proves the goal.
  - Include a contract test (test/contract.*) that runs OFFLINE and exits 0 exactly when the goal behavior works.
  - Pin every dependency with a lockfile so resolution is reproducible.
  - No secrets, credentials, or tokens. No real URLs (only example.com or localhost). No absolute paths.
  - No personal names, emails, company names, or project identifiers of any kind.
  - No binaries and no generated output (node_modules, dist, target, venv, .git, .env).
  - Keep it under 200 files and 256KB packed.
csx.json
{"case":{"caseId":"case:sha256:5ea1b6ef23a70943741e762c51a4a0d7aea1b3003dc25bb06479eae114643961","constraints":{"executionContext":"node"},"contract":["suggestOption returns formatted 'Did you mean \"\u003csuggestion\u003e\"?' message when unrecognized option has Levenshtein distance \u003c 3 to an allowed option","suggestOption returns an empty string when no allowed option is within Levenshtein distance \u003c 3","suggestOption selects the first matching suggestion when multiple allowed options are within distance threshold","suggestOption handles exact match by returning did you mean suggestion with edit distance 0"],"goal":"verify jest-validate.createDidYouMeanMessage in pkg:npm/jest-validate@29.7.0","kind":"HOW","packages":["pkg:npm/jest-validate@29.7.0"],"schemaVersion":1,"symbols":["jest-validate.createDidYouMeanMessage"]},"contractCommand":["node","test/contract.mjs"],"environment":{"arch":"x64","distro":"ubuntu","ecosystem":"npm","executionContext":"node","language":"javascript","libc":"glibc","libcVersion":"2.39","moduleSystem":"cjs","os":"linux","osVersionBucket":"24","packageManager":"npm","packageManagerVersion":"10.9.8","runtime":"node","runtimeVersion":"22.23.2","schemaVersion":1},"license":"MIT-0","packages":["pkg:npm/jest-validate@29.7.0"],"schemaVersion":1,"subject":"pkg:npm/jest-validate@29.7.0","symbols":["jest-validate.createDidYouMeanMessage"],"verifierAdapter":"node-typescript@1"}
package-lock.json
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package.json
{
  "name": "sample-jest-validate-create-did-you-mean-message",
  "version": "1.0.0",
  "private": true,
  "description": "Clean-room verification of jest-validate.createDidYouMeanMessage",
  "main": "src/index.js",
  "dependencies": {
    "jest-validate": "29.7.0"
  }
}
spec.json
{
  "schemaVersion": 1,
  "goal": "verify jest-validate.createDidYouMeanMessage in pkg:npm/jest-validate@29.7.0",
  "kind": "HOW",
  "packages": [
    "pkg:npm/jest-validate@29.7.0"
  ],
  "symbols": [
    "jest-validate.createDidYouMeanMessage"
  ],
  "constraints": {
    "executionContext": "node"
  },
  "runtimeConditions": {
    "ecosystem": "npm",
    "language": "javascript",
    "moduleSystem": "cjs",
    "packageManager": "npm@10.9.8",
    "runtime": "node@22.23.2"
  }
}
src/index.js
const { createDidYouMeanMessage } = require('jest-validate');

/**
 * Generate a "Did you mean ...?" suggestion message for an unrecognized option.
 * @param {string} unrecognized - The unrecognized option name.
 * @param {string[]} allowedOptions - List of valid allowed option names.
 * @returns {string} Suggestion message if a close match (<3 edit distance) exists, otherwise empty string.
 */
function suggestOption(unrecognized, allowedOptions) {
  return createDidYouMeanMessage(unrecognized, allowedOptions);
}

module.exports = {
  suggestOption,
  createDidYouMeanMessage
};
test/contract.mjs
import assert from 'node:assert';
import { createRequire } from 'node:module';

const require = createRequire(import.meta.url);
const { suggestOption, createDidYouMeanMessage } = require('../src/index.js');

// 1. Export verification
assert.strictEqual(typeof suggestOption, 'function', 'suggestOption should be a function');
assert.strictEqual(typeof createDidYouMeanMessage, 'function', 'createDidYouMeanMessage should be a function');

// 2. Returns suggestion when edit distance < 3 (typo with 1 edit)
const allowed = ['transform', 'testMatch', 'coverageDirectory', 'verbose'];
const typoMessage = suggestOption('tranzform', allowed);
assert.strictEqual(typeof typoMessage, 'string', 'Message should be a string');
assert.ok(typoMessage.includes('Did you mean'), 'Message should contain "Did you mean"');
assert.ok(typoMessage.includes('transform'), 'Message should suggest "transform"');

// 3. Returns empty string when edit distance >= 3
const distantMessage = suggestOption('completelyDifferentOption', allowed);
assert.strictEqual(distantMessage, '', 'Should return empty string when no options are close');

// 4. Returns first matching option when multiple are within distance < 3
const multipleAllowed = ['test1', 'test2'];
const firstMatchMessage = suggestOption('test', multipleAllowed);
assert.ok(firstMatchMessage.includes('test1'), 'Should suggest the first matching option');

// 5. Handles exact match with distance 0
const exactMessage = suggestOption('verbose', allowed);
assert.ok(exactMessage.includes('verbose'), 'Should suggest matching option on exact string');

console.log('Contract tests passed successfully.');

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