pretty-bytes 5.6.0

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/pretty-bytes@5.6.0
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/pretty-bytes@5.6.0

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:sha256:812f62ee3a82cc5a252f87aebe14520ea3d4fc25d83300d56c89839f32dc644d","contract":["prettyBytes formats byte counts into human-readable SI strings with appropriate metric prefixes","prettyBytes formats byte counts using binary units with powers of 1024 when binary option is true","prettyBytes formats bit counts when bits option is true","prettyBytes prefixes signed indicators when signed option is true","prettyBytes controls decimal precision using minimumFractionDigits and maximumFractionDigits options","prettyBytes throws TypeError when input is not a finite number","prettyBytes formats localized numbers when locale option is provided"],"goal":"verify pkg:npm/pretty-bytes@5.6.0","kind":"HOW","packages":["pkg:npm/pretty-bytes@5.6.0"],"schemaVersion":1},"contractCommand":["node","test/contract.mjs"],"environment":{"arch":"x64","distro":"ubuntu","ecosystem":"npm","libc":"glibc","libcVersion":"2.39","os":"linux","osVersionBucket":"24","packageManager":"npm","schemaVersion":1},"license":"MIT-0","packages":["pkg:npm/pretty-bytes@5.6.0"],"schemaVersion":1,"subject":"pkg:npm/pretty-bytes@5.6.0","verifierAdapter":"node-typescript@1"}

{
  "name": "sample-pretty-bytes",
  "version": "1.0.0",
  "lockfileVersion": 3,
  "requires": true,
  "packages": {
    "": {
      "name": "sample-pretty-bytes",
      "version": "1.0.0",
      "license": "MIT-0",
      "dependencies": {
        "pretty-bytes": "5.6.0"
      }
    },
    "node_modules/pretty-bytes": {
      "version": "5.6.0",
      "resolved": "https://registry.npmjs.org/pretty-bytes/-/pretty-bytes-5.6.0.tgz",
      "integrity": "sha512-FFw039TmrBqFK8ma/7OL3sDz/VytdtJr044/QUJtH0wK9lb9jLq9tJyIxUwtQJHwar2BqtiA4iCWSwo9JLkzFg==",
      "license": "MIT",
      "engines": {
        "node": ">=6"
      },
      "funding": {
        "url": "https://github.com/sponsors/sindresorhus"
      }
    }
  }
}

{
  "name": "sample-pretty-bytes",
  "version": "1.0.0",
  "private": true,
  "license": "MIT-0",
  "dependencies": {
    "pretty-bytes": "5.6.0"
  }
}

{
  "schemaVersion": 1,
  "goal": "verify pkg:npm/pretty-bytes@5.6.0",
  "kind": "HOW",
  "packages": [
    "pkg:npm/pretty-bytes@5.6.0"
  ]
}

import assert from 'node:assert';
import prettyBytes from 'pretty-bytes';

// 1. prettyBytes formats byte counts into human-readable SI strings with appropriate metric prefixes
assert.strictEqual(prettyBytes(0), '0 B');
assert.strictEqual(prettyBytes(0.4), '0.4 B');
assert.strictEqual(prettyBytes(100), '100 B');
assert.strictEqual(prettyBytes(1000), '1 kB');
assert.strictEqual(prettyBytes(1000 * 1000), '1 MB');
assert.strictEqual(prettyBytes(1337), '1.34 kB');

// 2. prettyBytes formats byte counts using binary units with powers of 1024 when binary option is true
assert.strictEqual(prettyBytes(1024, { binary: true }), '1 kiB');
assert.strictEqual(prettyBytes(1024 * 1024, { binary: true }), '1 MiB');

// 3. prettyBytes formats bit counts when bits option is true
assert.strictEqual(prettyBytes(1337, { bits: true }), '1.34 kbit');
assert.strictEqual(prettyBytes(1024, { bits: true, binary: true }), '1 kibit');

// 4. prettyBytes prefixes signed indicators when signed option is true
assert.strictEqual(prettyBytes(42, { signed: true }), '+42 B');
assert.strictEqual(prettyBytes(-42, { signed: true }), '-42 B');
assert.strictEqual(prettyBytes(-42), '-42 B');
assert.strictEqual(prettyBytes(0, { signed: true }), ' 0 B');

// 5. prettyBytes controls decimal precision using minimumFractionDigits and maximumFractionDigits options
assert.strictEqual(prettyBytes(1900, { minimumFractionDigits: 3 }), '1.900 kB');
assert.strictEqual(prettyBytes(1920, { maximumFractionDigits: 1 }), '1.9 kB');

// 6. prettyBytes throws TypeError when input is not a finite number
assert.throws(() => prettyBytes(NaN), { name: 'TypeError' });
assert.throws(() => prettyBytes(Infinity), { name: 'TypeError' });
assert.throws(() => prettyBytes('100'), { name: 'TypeError' });

// 7. prettyBytes formats localized numbers when locale option is provided
assert.strictEqual(prettyBytes(1337, { locale: 'de' }), '1,34 kB');