object-keys 1.1.1: shim

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/object-keys@1.1.1
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/object-keys@1.1.1
Demonstrate these symbols/APIs:
  - object-keys
  - object-keys.shim

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:d406106c8c2b2d0105b18a4e68a0f8659d26b860b96b9d93691a8dd9f3f71711","contract":["objectKeys returns enumerable own property names of an object","objectKeys returns array indices as string keys for arrays and strings","objectKeys ignores non-enumerable and prototype properties","objectKeys.shim returns Object.keys function and shims global Object.keys"],"goal":"verify pkg:npm/object-keys@1.1.1","kind":"HOW","packages":["pkg:npm/object-keys@1.1.1"],"schemaVersion":1,"symbols":["object-keys","object-keys.shim"]},"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/object-keys@1.1.1"],"schemaVersion":1,"subject":"pkg:npm/object-keys@1.1.1","symbols":["object-keys","object-keys.shim"],"verifierAdapter":"node-typescript@1"}

const objectKeys = require('object-keys');

/**
 * Returns an array of a given object's own enumerable property names.
 * @param {object} obj
 * @returns {string[]}
 */
function getKeys(obj) {
  return objectKeys(obj);
}

/**
 * Installs shim for Object.keys.
 * @returns {Function}
 */
function shimKeys() {
  return objectKeys.shim();
}

module.exports = {
  getKeys,
  shimKeys,
  objectKeys,
};

{
  "name": "sample-object-keys",
  "version": "1.0.0",
  "lockfileVersion": 3,
  "requires": true,
  "packages": {
    "": {
      "name": "sample-object-keys",
      "version": "1.0.0",
      "dependencies": {
        "object-keys": "1.1.1"
      }
    },
    "node_modules/object-keys": {
      "version": "1.1.1",
      "resolved": "https://registry.npmjs.org/object-keys/-/object-keys-1.1.1.tgz",
      "integrity": "sha512-NuAESUOUMrlIXOfHKzD6bpPu3tYt3xvjNdRIQ+FeT0lNb4K8WR70CaDxhuNguS2XG+GjkyMwOzsN5ZktImfhLA==",
      "license": "MIT",
      "engines": {
        "node": ">= 0.4"
      }
    }
  }
}

{
  "name": "sample-object-keys",
  "version": "1.0.0",
  "private": true,
  "description": "Verify pkg:npm/object-keys@1.1.1",
  "main": "index.js",
  "scripts": {
    "test": "node test/contract.cjs"
  },
  "dependencies": {
    "object-keys": "1.1.1"
  }
}

{
  "schemaVersion": 1,
  "goal": "verify pkg:npm/object-keys@1.1.1",
  "kind": "HOW",
  "packages": [
    "pkg:npm/object-keys@1.1.1"
  ],
  "symbols": [
    "object-keys",
    "object-keys.shim"
  ]
}

const assert = require('node:assert');
const { getKeys, shimKeys, objectKeys } = require('../index.js');

// 1. objectKeys returns enumerable own property names of an object
{
  const obj = { a: 1, b: 2, c: 3 };
  const keys = getKeys(obj);
  assert.deepStrictEqual(keys, ['a', 'b', 'c']);

  const empty = {};
  assert.deepStrictEqual(getKeys(empty), []);
}

// 2. objectKeys returns array indices as string keys for arrays and strings
{
  const arr = ['x', 'y', 'z'];
  assert.deepStrictEqual(getKeys(arr), ['0', '1', '2']);

  const str = 'hi';
  assert.deepStrictEqual(getKeys(str), ['0', '1']);
}

// 3. objectKeys ignores non-enumerable and prototype properties
{
  const proto = { protoProp: 'hidden' };
  const child = Object.create(proto);
  child.ownProp = 'visible';

  Object.defineProperty(child, 'nonEnum', {
    value: 'secret',
    enumerable: false,
  });

  const keys = getKeys(child);
  assert.deepStrictEqual(keys, ['ownProp']);
}

// 4. objectKeys.shim returns Object.keys function and shims global Object.keys
{
  const shimmed = shimKeys();
  assert.strictEqual(typeof shimmed, 'function');
  assert.strictEqual(shimmed, Object.keys);
  assert.strictEqual(typeof objectKeys.shim, 'function');
}