std-env 4.2.0: nodeVersion

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.nodeVersion in pkg:npm/std-env@4.2.0
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/std-env@4.2.0
Demonstrate these symbols/APIs:
  - std-env.nodeVersion

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:sha256:50e9c1dd5b5a6371972c6c6c744d72146773eab933a8ffa65c8416902aa4b003","contract":["std-env.nodeVersion exports a string representing the Node.js runtime version, or null when not in Node.js","std-env.nodeVersion evaluates to a non-null version string matching process.versions.node without leading 'v' in Node.js","std-env.nodeVersion conforms to semver major.minor.patch numeric format","std-env.nodeVersion is consistent with nodeMajorVersion matching its parsed major version integer","std-env.nodeVersion is non-null when isNode evaluates to true in Node.js runtime"],"goal":"verify std-env.nodeVersion in pkg:npm/std-env@4.2.0","kind":"HOW","packages":["pkg:npm/std-env@4.2.0"],"schemaVersion":1,"symbols":["std-env.nodeVersion"]},"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@4.2.0"],"schemaVersion":1,"subject":"pkg:npm/std-env@4.2.0","symbols":["std-env.nodeVersion"],"verifierAdapter":"node-typescript@1"}

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

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

{
  "name": "sample-std-env-node-version",
  "version": "1.0.0",
  "lockfileVersion": 3,
  "requires": true,
  "packages": {
    "": {
      "name": "sample-std-env-node-version",
      "version": "1.0.0",
      "license": "MIT-0",
      "dependencies": {
        "std-env": "4.2.0"
      }
    },
    "node_modules/std-env": {
      "version": "4.2.0",
      "resolved": "https://registry.npmjs.org/std-env/-/std-env-4.2.0.tgz",
      "integrity": "sha512-oCUKSupKTHX53EyjDtuZQ64pjLJ6yYCtpmEw0goYxtjG9KpbRe8KAsl2tBUGU9DyMcJ0RwJ8GqJAFzMXcXW1Rw==",
      "license": "MIT"
    }
  }
}

{
  "name": "sample-std-env-node-version",
  "version": "1.0.0",
  "type": "module",
  "main": "index.mjs",
  "license": "MIT-0",
  "scripts": {
    "test": "node test/contract.mjs"
  },
  "dependencies": {
    "std-env": "4.2.0"
  }
}

{
  "schemaVersion": 1,
  "goal": "verify std-env.nodeVersion in pkg:npm/std-env@4.2.0",
  "kind": "HOW",
  "packages": [
    "pkg:npm/std-env@4.2.0"
  ],
  "symbols": [
    "std-env.nodeVersion"
  ]
}

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

// 1. std-env.nodeVersion exports a string representing the Node.js runtime version, or null when not in Node.js
{
  assert.equal(typeof nodeVersion, 'string', 'nodeVersion must be a string');
  assert.notEqual(nodeVersion, null, 'nodeVersion must not be null');
  assert.equal(typeof stdEnv.nodeVersion, 'string', 'std-env.nodeVersion must be a string');
  assert.notEqual(stdEnv.nodeVersion, null, 'std-env.nodeVersion must not be null');
}

// 2. std-env.nodeVersion evaluates to a non-null version string matching process.versions.node without leading 'v' in Node.js
{
  const expectedVersion = (process.versions?.node || '').replace(/^v/, '') || null;
  assert.equal(nodeVersion, expectedVersion, 'nodeVersion must match process.versions.node without leading "v"');
  assert.equal(stdEnv.nodeVersion, expectedVersion, 'std-env.nodeVersion must match process.versions.node without leading "v"');
}

// 3. std-env.nodeVersion conforms to semver major.minor.patch numeric format
{
  const semverPattern = /^\d+\.\d+\.\d+/;
  assert.match(nodeVersion, semverPattern, 'nodeVersion must follow semver numeric format');
  assert.match(stdEnv.nodeVersion, semverPattern, 'std-env.nodeVersion must follow semver numeric format');
}

// 4. std-env.nodeVersion is consistent with nodeMajorVersion matching its parsed major version integer
{
  const expectedMajor = parseInt(nodeVersion.split('.')[0], 10);
  assert.equal(typeof nodeMajorVersion, 'number', 'nodeMajorVersion must be a number');
  assert.equal(nodeMajorVersion, expectedMajor, 'nodeMajorVersion must equal parsed major integer of nodeVersion');
  assert.equal(stdEnv.nodeMajorVersion, expectedMajor, 'std-env.nodeMajorVersion must equal parsed major integer of std-env.nodeVersion');
}

// 5. std-env.nodeVersion is non-null when isNode evaluates to true in Node.js runtime
{
  assert.equal(isNode, true, 'isNode must be true in Node.js runtime');
  assert.equal(stdEnv.isNode, true, 'std-env.isNode must be true in Node.js runtime');
  assert.equal(runtime, 'node', 'runtime must be "node" in Node.js runtime');
  assert.equal(stdEnv.runtime, 'node', 'std-env.runtime must be "node" in Node.js runtime');
  assert.ok(nodeVersion && nodeVersion.length > 0, 'nodeVersion must be a non-empty string when isNode is true');
}

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