jest-validate 30.4.1: 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@30.4.1
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/jest-validate@30.4.1
Demonstrate these symbols/APIs:
  - jest-validate.createDidYouMeanMessage

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.

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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": "30.4.1"
  }
}

{
  "schemaVersion": 1,
  "goal": "verify jest-validate.createDidYouMeanMessage in pkg:npm/jest-validate@30.4.1",
  "kind": "HOW",
  "packages": [
    "pkg:npm/jest-validate@30.4.1"
  ],
  "symbols": [
    "jest-validate.createDidYouMeanMessage"
  ]
}

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.');