std-env 3.10.0: isNode

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 std-env.isNode in pkg:npm/std-env@3.10.0
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/std-env@3.10.0
Demonstrate these symbols/APIs:
  - std-env.isNode

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:sha256:373f2159b1615644599b2b94669dd3bcabed79846eb011be0829d0479e3737af","contract":["std-env.isNode exports a boolean indicating whether the execution environment is Node.js or Node-compatible","std-env.isNode evaluates to true in standard Node.js runtime environments","std-env.isNode consistently reflects Node.js execution with process.release.name and process.versions.node","std-env.isNode aligns with runtime name being node and valid nodeVersion and nodeMajorVersion","std-env.isNode distinguishes Node.js from other runtimes where isBun and isDeno evaluate to false"],"goal":"verify std-env.isNode in pkg:npm/std-env@3.10.0","kind":"HOW","packages":["pkg:npm/std-env@3.10.0"],"schemaVersion":1,"symbols":["std-env.isNode"]},"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/std-env@3.10.0"],"schemaVersion":1,"subject":"pkg:npm/std-env@3.10.0","symbols":["std-env.isNode"],"verifierAdapter":"node-typescript@1"}

import { isNode, nodeVersion, nodeMajorVersion, runtime, isBun, isDeno } from 'std-env';

export { isNode, nodeVersion, nodeMajorVersion, runtime, isBun, isDeno };
export default isNode;

{
  "name": "sample-std-env-is-node",
  "version": "1.0.0",
  "lockfileVersion": 3,
  "requires": true,
  "packages": {
    "": {
      "name": "sample-std-env-is-node",
      "version": "1.0.0",
      "license": "MIT-0",
      "dependencies": {
        "std-env": "3.10.0"
      }
    },
    "node_modules/std-env": {
      "version": "3.10.0",
      "resolved": "https://registry.npmjs.org/std-env/-/std-env-3.10.0.tgz",
      "integrity": "sha512-5GS12FdOZNliM5mAOxFRg7Ir0pWz8MdpYm6AY6VPkGpbA7ZzmbzNcBJQ0GPvvyWgcY7QAhCgf9Uy89I03faLkg==",
      "license": "MIT"
    }
  }
}

{
  "name": "sample-std-env-is-node",
  "version": "1.0.0",
  "type": "module",
  "main": "index.mjs",
  "license": "MIT-0",
  "scripts": {
    "test": "node test/contract.mjs"
  },
  "dependencies": {
    "std-env": "3.10.0"
  }
}

{
  "schemaVersion": 1,
  "goal": "verify std-env.isNode in pkg:npm/std-env@3.10.0",
  "kind": "HOW",
  "packages": [
    "pkg:npm/std-env@3.10.0"
  ],
  "symbols": [
    "std-env.isNode"
  ]
}

import assert from 'node:assert/strict';
import * as stdEnv from 'std-env';
import { isNode, nodeVersion, nodeMajorVersion, runtime, isBun, isDeno } from '../index.mjs';

// 1. std-env.isNode exports a boolean indicating whether the execution environment is Node.js or Node-compatible
{
  assert.equal(typeof isNode, 'boolean', 'isNode must be a boolean');
  assert.equal(typeof stdEnv.isNode, 'boolean', 'std-env package isNode must be a boolean');
}

// 2. std-env.isNode evaluates to true in standard Node.js runtime environments
{
  assert.equal(isNode, true, 'isNode must be true when running in standard Node.js');
  assert.equal(stdEnv.isNode, true, 'std-env.isNode must be true when running in standard Node.js');
}

// 3. std-env.isNode consistently reflects Node.js execution with process.release.name and process.versions.node
{
  const isNodeProcess = Boolean(
    typeof process !== 'undefined' &&
    process &&
    process.release?.name === 'node' &&
    process.versions?.node
  );
  assert.equal(isNodeProcess, true, 'process.release.name and process.versions.node must be present in this runtime');
  assert.equal(isNode, isNodeProcess, 'isNode must reflect Node.js process environment');
}

// 4. std-env.isNode aligns with runtime name being node and valid nodeVersion and nodeMajorVersion
{
  assert.equal(runtime, 'node', 'runtime identifier must be "node" in standard Node.js');
  assert.equal(stdEnv.runtime, 'node', 'std-env.runtime must be "node" in standard Node.js');
  assert.equal(typeof nodeVersion, 'string', 'nodeVersion must be a string');
  assert.equal(nodeVersion, process.versions.node, 'nodeVersion must match process.versions.node');
  assert.equal(typeof nodeMajorVersion, 'number', 'nodeMajorVersion must be a number');
  assert.equal(
    nodeMajorVersion,
    Number(process.versions.node.split('.')[0]),
    'nodeMajorVersion must match the major version of process.versions.node'
  );
}

// 5. std-env.isNode distinguishes Node.js from other runtimes where isBun and isDeno evaluate to false
{
  assert.equal(isBun, false, 'isBun must be false in Node.js runtime');
  assert.equal(isDeno, false, 'isDeno must be false in Node.js runtime');
  assert.equal(stdEnv.isBun, false, 'std-env.isBun must be false in Node.js runtime');
  assert.equal(stdEnv.isDeno, false, 'std-env.isDeno must be false in Node.js runtime');
  assert.equal(stdEnv.isFastly, false, 'std-env.isFastly must be false in Node.js runtime');
  assert.equal(stdEnv.isNetlify, false, 'std-env.isNetlify must be false in Node.js runtime');
  assert.equal(stdEnv.isEdgeLight, false, 'std-env.isEdgeLight must be false in Node.js runtime');
  assert.equal(stdEnv.isWorkerd, false, 'std-env.isWorkerd must be false in Node.js runtime');
}

console.log('All std-env.isNode contract assertions passed successfully.');