jest-validate 29.7.0: createDidYouMeanMessage

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.

{"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"}

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{
  "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"
  }
}

{
  "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",
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}

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
};

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.');