semver 6.3.1: parse

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 semver.parse in pkg:npm/semver@6.3.1
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/semver@6.3.1
Demonstrate these symbols/APIs:
  - semver.parse

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:f1c49cf255ac3cd0d34c56e148848f5bcc16ea54725df1b37f19bc6762095337","contract":["parse returns a SemVer object with numeric major, minor, and patch properties","parse extracts prerelease identifiers and build metadata","parse strips leading 'v' prefix","parse supports loose option for prefixed or non-strict version strings","parse returns null when given invalid version strings"],"goal":"verify semver.parse in pkg:npm/semver@6.3.1","kind":"HOW","packages":["pkg:npm/semver@6.3.1"],"schemaVersion":1,"symbols":["semver.parse"]},"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/semver@6.3.1"],"schemaVersion":1,"subject":"pkg:npm/semver@6.3.1","symbols":["semver.parse"],"verifierAdapter":"node-typescript@1"}

const semver = require('semver');

/**
 * Parse a version string into a SemVer object.
 * @param {string} version - The version string to parse.
 * @param {object|boolean} [options] - Optional parsing options (e.g. { loose: true }).
 * @returns {semver.SemVer|null} Parsed SemVer object or null.
 */
function parseVersion(version, options) {
  return semver.parse(version, options);
}

module.exports = {
  parseVersion,
};

{
  "name": "sample-semver-parse",
  "version": "1.0.0",
  "lockfileVersion": 3,
  "requires": true,
  "packages": {
    "": {
      "name": "sample-semver-parse",
      "version": "1.0.0",
      "dependencies": {
        "semver": "6.3.1"
      }
    },
    "node_modules/semver": {
      "version": "6.3.1",
      "resolved": "https://registry.npmjs.org/semver/-/semver-6.3.1.tgz",
      "integrity": "sha512-BR7VvDCVHO+q2xBEWskxS6DJE1qRnb7DxzUrogb71CWoSficBxYsiAGd+Kl0mmq/MprG9yArRkyrQxTO6XjMzA==",
      "license": "ISC",
      "bin": {
        "semver": "bin/semver.js"
      }
    }
  }
}

{
  "name": "sample-semver-parse",
  "version": "1.0.0",
  "private": true,
  "description": "verify semver.parse in pkg:npm/semver@6.3.1",
  "main": "index.js",
  "scripts": {
    "test": "node test/contract.cjs"
  },
  "dependencies": {
    "semver": "6.3.1"
  }
}

{
  "schemaVersion": 1,
  "goal": "verify semver.parse in pkg:npm/semver@6.3.1",
  "kind": "HOW",
  "packages": [
    "pkg:npm/semver@6.3.1"
  ],
  "symbols": [
    "semver.parse"
  ]
}

const assert = require('node:assert');
const semver = require('semver');
const { parseVersion } = require('../index.js');

// 1. parse returns a SemVer object with numeric major, minor, and patch properties
{
  const parsed = parseVersion('1.2.3');
  assert.notStrictEqual(parsed, null);
  assert.strictEqual(parsed.major, 1);
  assert.strictEqual(parsed.minor, 2);
  assert.strictEqual(parsed.patch, 3);
  assert.strictEqual(parsed.version, '1.2.3');
}

// 2. parse extracts prerelease identifiers and build metadata
{
  const parsed = parseVersion('1.2.3-beta.2+build.99');
  assert.notStrictEqual(parsed, null);
  assert.strictEqual(parsed.major, 1);
  assert.strictEqual(parsed.minor, 2);
  assert.strictEqual(parsed.patch, 3);
  assert.strictEqual(parsed.version, '1.2.3-beta.2');
  assert.deepStrictEqual(parsed.prerelease, ['beta', 2]);
  assert.deepStrictEqual(parsed.build, ['build', '99']);
}

// 3. parse strips leading 'v' prefix
{
  const parsed = parseVersion('v2.0.1');
  assert.notStrictEqual(parsed, null);
  assert.strictEqual(parsed.major, 2);
  assert.strictEqual(parsed.minor, 0);
  assert.strictEqual(parsed.patch, 1);
  assert.strictEqual(parsed.version, '2.0.1');
}

// 4. parse supports loose option for prefixed or non-strict version strings
{
  assert.strictEqual(parseVersion('=v1.2.3'), null);
  const looseParsed = parseVersion('=v1.2.3', { loose: true });
  assert.notStrictEqual(looseParsed, null);
  assert.strictEqual(looseParsed.version, '1.2.3');
}

// 5. parse returns null when given invalid version strings
{
  assert.strictEqual(parseVersion('invalid-version'), null);
  assert.strictEqual(parseVersion('1.2.3.4'), null);
  assert.strictEqual(parseVersion(''), null);
  assert.strictEqual(parseVersion(null), null);
}