@cacheable/utils 2.5.0: hash

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 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:
  - hash

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:a4d35ef78ae3963d89172db40fdbf4e51e549ee30a8c4dc97f5fbbec82431414","contract":["hash asynchronously produces hexadecimal hash strings using default SHA-256 algorithm","hash supports cryptographic algorithms SHA-384 and SHA-512 producing expected digest lengths","hashSync synchronously produces hash strings using default non-cryptographic djb2 algorithm","hashSync supports non-cryptographic algorithms FNV1, MURMER, and CRC32","hash accepts custom serialization function to customize input formatting before hashing","hashToNumber asynchronously converts cryptographic hash values to numbers within specified min and max bounds","hashToNumberSync synchronously converts non-cryptographic hash values to numbers within specified min and max bounds","hashToNumber and hashToNumberSync throw an error when min is greater than or equal to max"],"goal":"verify pkg:npm/%40cacheable/utils@2.5.0","kind":"HOW","packages":["pkg:npm/%40cacheable/utils@2.5.0"],"schemaVersion":1,"symbols":["hash"]},"contractCommand":["node","test/contract.mjs"],"environment":{"arch":"x64","distro":"ubuntu","ecosystem":"npm","language":"javascript","libc":"glibc","libcVersion":"2.39","moduleSystem":"esm","os":"linux","osVersionBucket":"24","packageManager":"npm","packageManagerVersion":"10.9.8","runtime":"node","runtimeVersion":"22.23.2","schemaVersion":1},"license":"MIT-0","packages":["pkg:npm/%40cacheable/utils@2.5.0"],"schemaVersion":1,"subject":"pkg:npm/%40cacheable/utils@2.5.0","symbols":["hash"],"verifierAdapter":"node-typescript@1"}

{
  "name": "sample-cacheable-utils-hash",
  "version": "1.0.0",
  "lockfileVersion": 3,
  "requires": true,
  "packages": {
    "": {
      "name": "sample-cacheable-utils-hash",
      "version": "1.0.0",
      "license": "MIT-0",
      "dependencies": {
        "@cacheable/utils": "2.5.0"
      }
    },
    "node_modules/@cacheable/utils": {
      "version": "2.5.0",
      "resolved": "https://registry.npmjs.org/@cacheable/utils/-/utils-2.5.0.tgz",
      "integrity": "sha512-buipgOVDkkPXNR5+xBpDw7Zk2n1EvU7qBJCNUcL7rhQ//kfpOXPAvQ511Os0vpLYJ1pZnvudNytkQt2hst3wqA==",
      "license": "MIT",
      "dependencies": {
        "hashery": "^1.5.1",
        "keyv": "^5.6.0"
      }
    },
    "node_modules/@keyv/serialize": {
      "version": "1.1.1",
      "resolved": "https://registry.npmjs.org/@keyv/serialize/-/serialize-1.1.1.tgz",
      "integrity": "sha512-dXn3FZhPv0US+7dtJsIi2R+c7qWYiReoEh5zUntWCf4oSpMNib8FDhSoed6m3QyZdx5hK7iLFkYk3rNxwt8vTA==",
      "license": "MIT"
    },
    "node_modules/hashery": {
      "version": "1.5.1",
      "resolved": "https://registry.npmjs.org/hashery/-/hashery-1.5.1.tgz",
      "integrity": "sha512-iZyKG96/JwPz1N55vj2Ie2vXbhu440zfUfJvSwEqEbeLluk7NnapfGqa7LH0mOsnDxTF85Mx8/dyR6HfqcbmbQ==",
      "license": "MIT",
      "dependencies": {
        "hookified": "^1.15.0"
      },
      "engines": {
        "node": ">=20"
      }
    },
    "node_modules/hookified": {
      "version": "1.15.1",
      "resolved": "https://registry.npmjs.org/hookified/-/hookified-1.15.1.tgz",
      "integrity": "sha512-MvG/clsADq1GPM2KGo2nyfaWVyn9naPiXrqIe4jYjXNZQt238kWyOGrsyc/DmRAQ+Re6yeo6yX/yoNCG5KAEVg==",
      "license": "MIT"
    },
    "node_modules/keyv": {
      "version": "5.6.0",
      "resolved": "https://registry.npmjs.org/keyv/-/keyv-5.6.0.tgz",
      "integrity": "sha512-CYDD3SOtsHtyXeEORYRx2qBtpDJFjRTGXUtmNEMGyzYOKj1TE3tycdlho7kA1Ufx9OYWZzg52QFBGALTirzDSw==",
      "license": "MIT",
      "dependencies": {
        "@keyv/serialize": "^1.1.1"
      }
    }
  }
}

{
  "name": "sample-cacheable-utils-hash",
  "version": "1.0.0",
  "type": "module",
  "private": true,
  "license": "MIT-0",
  "scripts": {
    "test": "node test/contract.mjs"
  },
  "dependencies": {
    "@cacheable/utils": "2.5.0"
  }
}

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

import {
  hash,
  hashSync,
  hashToNumber,
  hashToNumberSync,
  HashAlgorithm
} from '@cacheable/utils';

export {
  hash,
  hashSync,
  hashToNumber,
  hashToNumberSync,
  HashAlgorithm
};

export default hash;

import assert from 'node:assert/strict';
import {
  hash,
  hashSync,
  hashToNumber,
  hashToNumberSync,
  HashAlgorithm
} from '@cacheable/utils';
import defaultHash from '../src/index.mjs';

// 1. hash asynchronously produces hexadecimal hash strings using default SHA-256 algorithm
{
  const result = await hash('cache-key-1');
  assert.equal(typeof result, 'string');
  assert.equal(result.length, 64);
  assert.match(result, /^[0-9a-f]{64}$/);

  const defaultResult = await defaultHash('cache-key-1');
  assert.equal(defaultResult, result);

  // Different inputs produce different hashes
  const result2 = await hash('cache-key-2');
  assert.notEqual(result, result2);
}

// 2. hash supports cryptographic algorithms SHA-384 and SHA-512 producing expected digest lengths
{
  const sha384 = await hash('payload', { algorithm: HashAlgorithm.SHA384 });
  assert.equal(typeof sha384, 'string');
  assert.equal(sha384.length, 96);
  assert.match(sha384, /^[0-9a-f]{96}$/);

  const sha512 = await hash('payload', { algorithm: HashAlgorithm.SHA512 });
  assert.equal(typeof sha512, 'string');
  assert.equal(sha512.length, 128);
  assert.match(sha512, /^[0-9a-f]{128}$/);
}

// 3. hashSync synchronously produces hash strings using default non-cryptographic djb2 algorithm
{
  const syncResult = hashSync('cache-key-sync');
  assert.equal(typeof syncResult, 'string');
  assert.ok(syncResult.length > 0);

  // Consistent for identical inputs
  const repeatResult = hashSync('cache-key-sync');
  assert.equal(syncResult, repeatResult);

  // Different inputs produce different hashes
  const differentResult = hashSync('cache-key-sync-other');
  assert.notEqual(syncResult, differentResult);
}

// 4. hashSync supports non-cryptographic algorithms FNV1, MURMER, and CRC32
{
  const fnv = hashSync('test-data', { algorithm: HashAlgorithm.FNV1 });
  const mur = hashSync('test-data', { algorithm: HashAlgorithm.MURMER });
  const crc = hashSync('test-data', { algorithm: HashAlgorithm.CRC32 });

  assert.equal(typeof fnv, 'string');
  assert.equal(typeof mur, 'string');
  assert.equal(typeof crc, 'string');
  assert.ok(fnv.length > 0);
  assert.ok(mur.length > 0);
  assert.ok(crc.length > 0);
}

// 5. hash accepts custom serialization function to customize input formatting before hashing
{
  const obj = { id: 101, tag: 'featured' };
  const customHash = await hash(obj, {
    serialize: (item) => `${item.tag}#${item.id}`
  });
  const directHash = await hash('featured#101', {
    serialize: (str) => str
  });
  assert.equal(customHash, directHash);
}

// 6. hashToNumber asynchronously converts cryptographic hash values to numbers within specified min and max bounds
{
  const min = 10;
  const max = 50;
  const num = await hashToNumber({ route: '/api/v1/users' }, {
    min,
    max,
    algorithm: HashAlgorithm.SHA256
  });

  assert.equal(typeof num, 'number');
  assert.ok(num >= min);
  assert.ok(num <= max);
  assert.equal(Number.isFinite(num), true);
}

// 7. hashToNumberSync synchronously converts non-cryptographic hash values to numbers within specified min and max bounds
{
  const min = 1;
  const max = 100;
  const numSync = hashToNumberSync('partition-key', {
    min,
    max,
    algorithm: HashAlgorithm.DJB2
  });

  assert.equal(typeof numSync, 'number');
  assert.ok(numSync >= min);
  assert.ok(numSync <= max);
  assert.equal(Number.isFinite(numSync), true);
}

// 8. hashToNumber and hashToNumberSync throw an error when min is greater than or equal to max
{
  await assert.rejects(
    async () => hashToNumber('value', { min: 20, max: 10 }),
    /Invalid range: min \(20\) must be less than max \(10\)/
  );

  assert.throws(
    () => hashToNumberSync('value', { min: 30, max: 30 }),
    /Invalid range: min \(30\) must be less than max \(30\)/
  );
}

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