statuses 2.0.1: status

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 status in pkg:npm/statuses@2.0.1
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/statuses@2.0.1
Demonstrate these symbols/APIs:
  - status

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:ebbaa13eaf429e3bcd4d064a7f67036df8730cbbb56fca72034e4e26ebb9c0fe","contract":["status(code) returns status message when given numeric status code","status(code) returns status message when given numeric string","status(message) returns status code number case-insensitively when given status message string","status(code) throws Error when numeric status code is not recognized","status(message) throws Error when status message is not recognized","status(code) throws TypeError when argument is not a number or string","status.message and status.code provide mappings between status codes and messages","status.redirect, status.empty, and status.retry categorise status codes by HTTP semantics"],"goal":"verify status in pkg:npm/statuses@2.0.1","kind":"HOW","packages":["pkg:npm/statuses@2.0.1"],"schemaVersion":1,"symbols":["status"]},"contractCommand":["node","test/contract.cjs"],"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/statuses@2.0.1"],"schemaVersion":1,"subject":"pkg:npm/statuses@2.0.1","symbols":["status"],"verifierAdapter":"node-typescript@1"}

{
  "name": "sample-statuses",
  "version": "1.0.0",
  "lockfileVersion": 3,
  "requires": true,
  "packages": {
    "": {
      "name": "sample-statuses",
      "version": "1.0.0",
      "dependencies": {
        "statuses": "2.0.1"
      }
    },
    "node_modules/statuses": {
      "version": "2.0.1",
      "resolved": "https://registry.npmjs.org/statuses/-/statuses-2.0.1.tgz",
      "integrity": "sha512-RwNA9Z/7PrK06rYLIzFMlaF+l73iwpzsqRIFgbMLbTcLD6cOao82TaWefPXQvB2fOC4AjuYSEndS7N/mTCbkdQ==",
      "license": "MIT",
      "engines": {
        "node": ">= 0.8"
      }
    }
  }
}

{
  "name": "sample-statuses",
  "version": "1.0.0",
  "private": true,
  "description": "Clean-room verification for statuses",
  "main": "src/index.js",
  "dependencies": {
    "statuses": "2.0.1"
  }
}

{
  "schemaVersion": 1,
  "goal": "verify status in pkg:npm/statuses@2.0.1",
  "kind": "HOW",
  "packages": [
    "pkg:npm/statuses@2.0.1"
  ],
  "symbols": [
    "status"
  ]
}

const status = require('statuses');

/**
 * Look up status code or message.
 * @param {number|string} code - Status code number or status message string
 * @returns {string|number} Status message if code is number/numeric string, or status code if code is message string
 */
function getStatus(code) {
  return status(code);
}

module.exports = {
  status,
  getStatus
};

const assert = require('node:assert');
const status = require('statuses');
const { getStatus } = require('../src/index.js');

// 1. status(code) returns status message when given numeric status code
assert.strictEqual(status(200), 'OK');
assert.strictEqual(status(404), 'Not Found');
assert.strictEqual(status(500), 'Internal Server Error');
assert.strictEqual(getStatus(200), 'OK');

// 2. status(code) returns status message when given numeric string
assert.strictEqual(status('200'), 'OK');
assert.strictEqual(status('404'), 'Not Found');
assert.strictEqual(getStatus('404'), 'Not Found');

// 3. status(message) returns status code number case-insensitively when given status message string
assert.strictEqual(status('ok'), 200);
assert.strictEqual(status('OK'), 200);
assert.strictEqual(status('Not Found'), 404);
assert.strictEqual(status('not found'), 404);
assert.strictEqual(getStatus('Internal Server Error'), 500);

// 4. status(code) throws Error when numeric status code is not recognized
assert.throws(() => status(999), /^Error: invalid status code: 999$/);

// 5. status(message) throws Error when status message is not recognized
assert.throws(() => status('Unknown Custom Status'), /^Error: invalid status message: "Unknown Custom Status"$/);

// 6. status(code) throws TypeError when argument is not a number or string
assert.throws(() => status(null), /^TypeError: code must be a number or string$/);
assert.throws(() => status({}), /^TypeError: code must be a number or string$/);

// 7. status.message and status.code provide mappings between status codes and messages
assert.strictEqual(status.message[200], 'OK');
assert.strictEqual(status.message[404], 'Not Found');
assert.strictEqual(status.code['not found'], 404);
assert.strictEqual(status.code['ok'], 200);
assert(Array.isArray(status.codes));
assert(status.codes.includes(200));

// 8. status.redirect, status.empty, and status.retry categorise status codes by HTTP semantics
assert.strictEqual(status.redirect[301], true);
assert.strictEqual(status.redirect[302], true);
assert.strictEqual(status.empty[204], true);
assert.strictEqual(status.empty[304], true);
assert.strictEqual(status.retry[502], true);
assert.strictEqual(status.retry[503], true);

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