@cacheable/utils 2.5.0: shorthandToMilliseconds

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 shorthandToMilliseconds in pkg:npm/%40cacheable/utils@2.5.0
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/%40cacheable/utils@2.5.0
Demonstrate these symbols/APIs:
  - shorthandToMilliseconds

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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      "license": "MIT-0",
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{
  "name": "sample-cacheable-utils",
  "version": "1.0.0",
  "private": true,
  "description": "Clean-room verification of @cacheable/utils shorthandToMilliseconds",
  "type": "module",
  "main": "src/index.js",
  "license": "MIT-0",
  "dependencies": {
    "@cacheable/utils": "2.5.0"
  }
}

{
  "schemaVersion": 1,
  "goal": "verify shorthandToMilliseconds in pkg:npm/%40cacheable/utils@2.5.0",
  "kind": "HOW",
  "packages": [
    "pkg:npm/%40cacheable/utils@2.5.0"
  ],
  "symbols": [
    "shorthandToMilliseconds"
  ]
}

import { shorthandToMilliseconds } from '@cacheable/utils';

/**
 * Convert shorthand time string or number to milliseconds.
 * @param {string | number} [shorthand]
 * @returns {number | undefined}
 */
export function parseDuration(shorthand) {
  return shorthandToMilliseconds(shorthand);
}

export { shorthandToMilliseconds };

import assert from 'node:assert';
import { shorthandToMilliseconds, parseDuration } from '../src/index.js';

// 1. shorthandToMilliseconds returns undefined when input is undefined or non-string and non-number
assert.strictEqual(shorthandToMilliseconds(), undefined);
assert.strictEqual(shorthandToMilliseconds(undefined), undefined);
assert.strictEqual(shorthandToMilliseconds(null), undefined);
assert.strictEqual(shorthandToMilliseconds(true), undefined);
assert.strictEqual(shorthandToMilliseconds({}), undefined);
assert.strictEqual(parseDuration(undefined), undefined);

// 2. shorthandToMilliseconds returns the numeric value directly when input is a number
assert.strictEqual(shorthandToMilliseconds(0), 0);
assert.strictEqual(shorthandToMilliseconds(1500), 1500);
assert.strictEqual(shorthandToMilliseconds(-500), -500);
assert.strictEqual(parseDuration(3000), 3000);

// 3. shorthandToMilliseconds parses numeric strings into milliseconds
assert.strictEqual(shorthandToMilliseconds('0'), 0);
assert.strictEqual(shorthandToMilliseconds('2500'), 2500);
assert.strictEqual(parseDuration('1000'), 1000);

// 4. shorthandToMilliseconds parses shorthand duration strings with units ms, s, m, h, hr, and d into milliseconds
assert.strictEqual(shorthandToMilliseconds('500ms'), 500);
assert.strictEqual(shorthandToMilliseconds('2s'), 2000);
assert.strictEqual(shorthandToMilliseconds('5m'), 300000);
assert.strictEqual(shorthandToMilliseconds('1h'), 3600000);
assert.strictEqual(shorthandToMilliseconds('2hr'), 7200000);
assert.strictEqual(shorthandToMilliseconds('1d'), 86400000);
assert.strictEqual(shorthandToMilliseconds('10MS'), 10);
assert.strictEqual(shorthandToMilliseconds('10 S'), 10000);

// 5. shorthandToMilliseconds parses fractional duration strings with units
assert.strictEqual(shorthandToMilliseconds('1.5s'), 1500);
assert.strictEqual(shorthandToMilliseconds('0.5m'), 30000);
assert.strictEqual(shorthandToMilliseconds('2.5h'), 9000000);
assert.strictEqual(shorthandToMilliseconds('0.5d'), 43200000);

// 6. shorthandToMilliseconds throws an Error with descriptive message when string format is unsupported
assert.throws(
  () => shorthandToMilliseconds('invalid'),
  /Unsupported time format: "invalid"\. Use 'ms', 's', 'm', 'h', 'hr', or 'd'\./
);
assert.throws(
  () => shorthandToMilliseconds('10years'),
  /Unsupported time format: "10years"\. Use 'ms', 's', 'm', 'h', 'hr', or 'd'\./
);

console.log('All shorthandToMilliseconds contract assertions passed.');