globals 15.15.0: node

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 globals.node in pkg:npm/globals@15.15.0
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/globals@15.15.0
Demonstrate these symbols/APIs:
  - globals.node

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:sha256:7e77216aec0061eb282051e395655c8d833a8c5e9771b83d337fbd14c2ecac8c","contract":["globals.node is a dictionary mapping Node.js runtime global identifiers to boolean writeability flags","globals.node marks exports as writable","globals.node marks core execution environment identifiers process, Buffer, global, and module as read-only","globals.node marks CommonJS module variables require, __dirname, and __filename as read-only","globals.node marks timer functions setTimeout, setInterval, and setImmediate as read-only","globals.node marks standard Web API globals fetch, crypto, URL, and AbortController as read-only"],"goal":"verify globals.node in pkg:npm/globals@15.15.0","kind":"HOW","packages":["pkg:npm/globals@15.15.0"],"schemaVersion":1,"symbols":["globals.node"]},"contractCommand":["node","test/contract.mjs"],"environment":{"arch":"x64","distro":"ubuntu","ecosystem":"npm","executionContext":"node","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/globals@15.15.0"],"schemaVersion":1,"subject":"pkg:npm/globals@15.15.0","symbols":["globals.node"],"verifierAdapter":"node-typescript@1"}

{
  "name": "sample-globals-node",
  "version": "1.0.0",
  "lockfileVersion": 3,
  "requires": true,
  "packages": {
    "": {
      "name": "sample-globals-node",
      "version": "1.0.0",
      "license": "MIT-0",
      "dependencies": {
        "globals": "15.15.0"
      }
    },
    "node_modules/globals": {
      "version": "15.15.0",
      "resolved": "https://registry.npmjs.org/globals/-/globals-15.15.0.tgz",
      "integrity": "sha512-7ACyT3wmyp3I61S4fG682L0VA2RGD9otkqGJIwNUMF1SWUombIIk+af1unuDYgMm082aHYwD+mzJvv9Iu8dsgg==",
      "license": "MIT",
      "engines": {
        "node": ">=18"
      },
      "funding": {
        "url": "https://github.com/sponsors/sindresorhus"
      }
    }
  }
}

{
  "name": "sample-globals-node",
  "version": "1.0.0",
  "private": true,
  "description": "Clean-room verification of globals.node in globals@15.15.0",
  "type": "module",
  "main": "src/index.js",
  "license": "MIT-0",
  "dependencies": {
    "globals": "15.15.0"
  }
}

{
  "schemaVersion": 1,
  "goal": "verify globals.node in pkg:npm/globals@15.15.0",
  "kind": "HOW",
  "packages": [
    "pkg:npm/globals@15.15.0"
  ],
  "symbols": [
    "globals.node"
  ]
}

import globals from 'globals';

/**
 * Returns the dictionary of Node.js global identifiers and their writeability status.
 *
 * @returns {Record<string, boolean>} Object mapping identifier names to boolean writeability flags.
 */
export function getNodeGlobals() {
  return globals.node;
}

/**
 * Checks whether a given identifier name is recognized as a Node.js global.
 *
 * @param {string} identifier - Identifier name to check.
 * @returns {boolean} True if the identifier exists in globals.node.
 */
export function isNodeGlobal(identifier) {
  return Object.hasOwn(globals.node, identifier);
}

/**
 * Checks whether a recognized Node.js global is writable (can be reassigned).
 *
 * @param {string} identifier - Identifier name to check.
 * @returns {boolean} True if writable, false if read-only or not present.
 */
export function isNodeGlobalWritable(identifier) {
  return globals.node[identifier] === true;
}

export { globals };
export default globals.node;

import assert from 'node:assert/strict';
import globals, { getNodeGlobals, isNodeGlobal, isNodeGlobalWritable } from '../src/index.js';

// 1. globals.node is a dictionary mapping Node.js runtime global identifiers to boolean writeability flags
assert.equal(typeof globals, 'object', 'globals should be an object');
assert.notEqual(globals, null, 'globals should not be null');
const nodeGlobals = getNodeGlobals();
assert.equal(typeof nodeGlobals, 'object', 'globals.node should be an object');
assert.notEqual(nodeGlobals, null, 'globals.node should not be null');
assert.equal(Object.keys(nodeGlobals).length, 74, 'globals.node should contain exactly 74 global identifiers');
for (const [identifier, isWritable] of Object.entries(nodeGlobals)) {
  assert.equal(typeof identifier, 'string', `identifier ${identifier} must be a string`);
  assert.equal(typeof isWritable, 'boolean', `writeability for ${identifier} must be a boolean`);
}

// 2. globals.node marks exports as writable
assert.equal(isNodeGlobal('exports'), true, 'exports must be recognized as a Node.js global');
assert.equal(isNodeGlobalWritable('exports'), true, 'exports must be marked as writable');
assert.equal(nodeGlobals.exports, true, 'globals.node.exports should be true');

// 3. globals.node marks core execution environment identifiers process, Buffer, global, and module as read-only
const coreIdentifiers = ['process', 'Buffer', 'global', 'module'];
for (const id of coreIdentifiers) {
  assert.equal(isNodeGlobal(id), true, `${id} must be recognized as a Node.js global`);
  assert.equal(isNodeGlobalWritable(id), false, `${id} must be marked as read-only`);
  assert.equal(nodeGlobals[id], false, `globals.node.${id} should be false`);
}

// 4. globals.node marks CommonJS module variables require, __dirname, and __filename as read-only
const cjsIdentifiers = ['require', '__dirname', '__filename'];
for (const id of cjsIdentifiers) {
  assert.equal(isNodeGlobal(id), true, `${id} must be recognized as a Node.js global`);
  assert.equal(isNodeGlobalWritable(id), false, `${id} must be marked as read-only`);
  assert.equal(nodeGlobals[id], false, `globals.node.${id} should be false`);
}

// 5. globals.node marks timer functions setTimeout, setInterval, and setImmediate as read-only
const timerIdentifiers = ['setTimeout', 'clearTimeout', 'setInterval', 'clearInterval', 'setImmediate', 'clearImmediate'];
for (const id of timerIdentifiers) {
  assert.equal(isNodeGlobal(id), true, `${id} must be recognized as a Node.js global`);
  assert.equal(isNodeGlobalWritable(id), false, `${id} must be marked as read-only`);
  assert.equal(nodeGlobals[id], false, `globals.node.${id} should be false`);
}

// 6. globals.node marks standard Web API globals fetch, crypto, URL, and AbortController as read-only
const webApiIdentifiers = [
  'fetch',
  'Headers',
  'Request',
  'Response',
  'crypto',
  'URL',
  'URLSearchParams',
  'AbortController',
  'AbortSignal',
  'Blob',
  'FormData',
  'structuredClone',
  'queueMicrotask',
];
for (const id of webApiIdentifiers) {
  assert.equal(isNodeGlobal(id), true, `${id} must be recognized as a Node.js global`);
  assert.equal(isNodeGlobalWritable(id), false, `${id} must be marked as read-only`);
  assert.equal(nodeGlobals[id], false, `globals.node.${id} should be false`);
}

// Ensure unknown non-node identifiers return false
assert.equal(isNodeGlobal('window'), false, 'window is not a node global in globals.node');
assert.equal(isNodeGlobalWritable('window'), false, 'window is not writable in globals.node');
assert.equal(isNodeGlobal('nonExistentGlobalXYZ'), false, 'non-existent identifier should return false');

console.log('Contract test passed.');