electron-to-chromium 1.5.412: fullVersions

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 fullVersions in pkg:npm/electron-to-chromium@1.5.412
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/electron-to-chromium@1.5.412
Demonstrate these symbols/APIs:
  - fullVersions

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:sha256:245f7bfe311015db82134d1691e3581d9794c25fa23c3c1496e8dc96701808e0","constraints":{"executionContext":"node"},"contract":["fullVersions is an object mapping Electron full version strings to Chromium full version strings","fullVersions maps legacy Electron versions to Chromium full versions","fullVersions maps modern Electron versions to Chromium full versions","fullVersions returns undefined for unmapped or non-existent Electron versions","fullVersions contains only string keys and string values"],"goal":"verify fullVersions in pkg:npm/electron-to-chromium@1.5.412","kind":"HOW","packages":["pkg:npm/electron-to-chromium@1.5.412"],"schemaVersion":1,"symbols":["fullVersions"]},"contractCommand":["node","test/contract.js"],"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/electron-to-chromium@1.5.412"],"schemaVersion":1,"subject":"pkg:npm/electron-to-chromium@1.5.412","symbols":["fullVersions"],"verifierAdapter":"node-typescript@1"}

{
  "name": "sample-electron-to-chromium-full-versions",
  "version": "1.0.0",
  "lockfileVersion": 3,
  "requires": true,
  "packages": {
    "": {
      "name": "sample-electron-to-chromium-full-versions",
      "version": "1.0.0",
      "license": "MIT-0",
      "dependencies": {
        "electron-to-chromium": "1.5.412"
      }
    },
    "node_modules/electron-to-chromium": {
      "version": "1.5.412",
      "resolved": "https://registry.npmjs.org/electron-to-chromium/-/electron-to-chromium-1.5.412.tgz",
      "integrity": "sha512-z4rMe3esBzlzovKHj4gxJnsCGZRK5l4baUvm+gCGJBPE+gsyUMKsuU9tnEUtI1dOebXz1ytAPGjvXhmQ7rIPwA==",
      "license": "ISC"
    }
  }
}

{
  "name": "sample-electron-to-chromium-full-versions",
  "version": "1.0.0",
  "private": true,
  "description": "Clean-room verification sample for fullVersions in electron-to-chromium",
  "main": "src/index.js",
  "scripts": {
    "test": "node test/contract.js"
  },
  "dependencies": {
    "electron-to-chromium": "1.5.412"
  },
  "license": "MIT-0"
}

{
  "schemaVersion": 1,
  "goal": "verify fullVersions in pkg:npm/electron-to-chromium@1.5.412",
  "kind": "HOW",
  "packages": [
    "pkg:npm/electron-to-chromium@1.5.412"
  ],
  "symbols": [
    "fullVersions"
  ]
}

const { fullVersions } = require('electron-to-chromium');

/**
 * Looks up the full Chromium version for a given full Electron version string.
 * @param {string} electronVersion Full Electron version string (e.g. '1.4.13', '33.0.0')
 * @returns {string|undefined} Full Chromium version string or undefined if not found
 */
function getFullChromiumVersion(electronVersion) {
  if (typeof electronVersion !== 'string') {
    return undefined;
  }
  return fullVersions[electronVersion];
}

module.exports = {
  fullVersions,
  getFullChromiumVersion
};

const assert = require('node:assert');
const { fullVersions, getFullChromiumVersion } = require('../src/index.js');
const rawEtc = require('electron-to-chromium');

// Verify export matches raw electron-to-chromium export
assert.strictEqual(fullVersions, rawEtc.fullVersions, 'fullVersions should match module export');
assert.strictEqual(typeof fullVersions, 'object', 'fullVersions must be an object');
assert.ok(fullVersions !== null, 'fullVersions must not be null');

// 1. fullVersions is an object mapping Electron full versions to Chromium full versions
const keys = Object.keys(fullVersions);
assert.ok(keys.length > 1000, 'fullVersions contains full version mappings');
assert.ok(keys.every(k => typeof k === 'string'), 'all keys in fullVersions are string version numbers');
assert.ok(Object.values(fullVersions).every(v => typeof v === 'string'), 'all values in fullVersions are string version numbers');

// 2. fullVersions maps legacy Electron versions to Chromium full versions
assert.strictEqual(fullVersions['0.20.0'], '39.0.2171.65', 'electron 0.20.0 maps to chromium 39.0.2171.65');
assert.strictEqual(fullVersions['1.4.13'], '53.0.2785.143', 'electron 1.4.13 maps to chromium 53.0.2785.143');
assert.strictEqual(getFullChromiumVersion('0.20.0'), '39.0.2171.65', 'helper getFullChromiumVersion resolves 0.20.0');
assert.strictEqual(getFullChromiumVersion('1.4.13'), '53.0.2785.143', 'helper getFullChromiumVersion resolves 1.4.13');

// 3. fullVersions maps modern Electron versions to Chromium full versions
assert.strictEqual(fullVersions['10.0.0'], '85.0.4183.84', 'electron 10.0.0 maps to chromium 85.0.4183.84');
assert.strictEqual(fullVersions['20.0.0'], '104.0.5112.65', 'electron 20.0.0 maps to chromium 104.0.5112.65');
assert.strictEqual(fullVersions['30.0.0'], '124.0.6367.49', 'electron 30.0.0 maps to chromium 124.0.6367.49');
assert.strictEqual(fullVersions['33.0.0'], '130.0.6723.44', 'electron 33.0.0 maps to chromium 130.0.6723.44');
assert.strictEqual(getFullChromiumVersion('33.0.0'), '130.0.6723.44', 'helper getFullChromiumVersion resolves 33.0.0');

// 4. fullVersions returns undefined for unmapped or non-existent Electron versions
assert.strictEqual(fullVersions['999.0.0'], undefined, 'non-existent version returns undefined');
assert.strictEqual(fullVersions['invalid-version'], undefined, 'invalid version key returns undefined');
assert.strictEqual(getFullChromiumVersion('999.0.0'), undefined, 'helper returns undefined for non-existent version');
assert.strictEqual(getFullChromiumVersion(null), undefined, 'helper returns undefined for non-string input');
assert.strictEqual(getFullChromiumVersion(123), undefined, 'helper returns undefined for numeric input');

console.log('Contract tests passed successfully.');