electron-to-chromium 1.5.412: fullChromiumVersions

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 electron-to-chromium.fullChromiumVersions 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:
  - electron-to-chromium.fullChromiumVersions

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:sha256:516161daf09a14739f3fff1b99cb358e73c0f356c0a0658615f2f1e970d76d9c","contract":["fullChromiumVersions is an object mapping Chromium full version strings to arrays of Electron version strings","fullChromiumVersions maps legacy Chromium full versions to arrays of Electron versions","fullChromiumVersions maps modern Chromium full versions to arrays of Electron versions","fullChromiumVersions returns undefined for unmapped or non-existent Chromium versions","fullChromiumVersions contains string keys and array of string values"],"goal":"verify electron-to-chromium.fullChromiumVersions in pkg:npm/electron-to-chromium@1.5.412","kind":"HOW","packages":["pkg:npm/electron-to-chromium@1.5.412"],"schemaVersion":1,"symbols":["electron-to-chromium.fullChromiumVersions"]},"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":["electron-to-chromium.fullChromiumVersions"],"verifierAdapter":"node-typescript@1"}

{
  "name": "sample-electron-to-chromium-full-chromium-versions",
  "version": "1.0.0",
  "lockfileVersion": 3,
  "requires": true,
  "packages": {
    "": {
      "name": "sample-electron-to-chromium-full-chromium-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-chromium-versions",
  "version": "1.0.0",
  "private": true,
  "description": "Clean-room verification sample for fullChromiumVersions 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 electron-to-chromium.fullChromiumVersions in pkg:npm/electron-to-chromium@1.5.412",
  "kind": "HOW",
  "packages": [
    "pkg:npm/electron-to-chromium@1.5.412"
  ],
  "symbols": [
    "electron-to-chromium.fullChromiumVersions"
  ]
}

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

/**
 * Looks up the list of Electron versions for a given full Chromium version string.
 * @param {string} chromiumVersion Full Chromium version string (e.g. '39.0.2171.65', '130.0.6723.44')
 * @returns {string[]|undefined} Array of Electron version strings or undefined if not found
 */
function getElectronVersionsForChromium(chromiumVersion) {
  if (typeof chromiumVersion !== 'string') {
    return undefined;
  }
  return fullChromiumVersions[chromiumVersion];
}

module.exports = {
  fullChromiumVersions,
  getElectronVersionsForChromium
};

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

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

// 1. fullChromiumVersions is an object mapping Chromium full version strings to arrays of Electron version strings
const keys = Object.keys(fullChromiumVersions);
assert.ok(keys.length > 500, 'fullChromiumVersions contains full version mappings');
assert.ok(keys.every(k => typeof k === 'string'), 'all keys in fullChromiumVersions are string version numbers');
assert.ok(Object.values(fullChromiumVersions).every(arr => Array.isArray(arr) && arr.every(v => typeof v === 'string')), 'all values in fullChromiumVersions are arrays of string version numbers');

// 2. fullChromiumVersions maps legacy Chromium full versions to arrays of Electron versions
assert.deepStrictEqual(fullChromiumVersions['39.0.2171.65'], ['0.20.0', '0.20.1', '0.20.2', '0.20.3', '0.20.4', '0.20.5', '0.20.6', '0.20.7', '0.20.8'], 'chromium 39.0.2171.65 maps to legacy electron versions');
assert.deepStrictEqual(fullChromiumVersions['40.0.2214.91'], ['0.21.0', '0.21.1', '0.21.2'], 'chromium 40.0.2214.91 maps to legacy electron versions');
assert.deepStrictEqual(getElectronVersionsForChromium('39.0.2171.65'), ['0.20.0', '0.20.1', '0.20.2', '0.20.3', '0.20.4', '0.20.5', '0.20.6', '0.20.7', '0.20.8'], 'helper getElectronVersionsForChromium resolves 39.0.2171.65');
assert.deepStrictEqual(getElectronVersionsForChromium('40.0.2214.91'), ['0.21.0', '0.21.1', '0.21.2'], 'helper getElectronVersionsForChromium resolves 40.0.2214.91');

// 3. fullChromiumVersions maps modern Chromium full versions to arrays of Electron versions
assert.deepStrictEqual(fullChromiumVersions['85.0.4183.84'], ['10.0.0'], 'chromium 85.0.4183.84 maps to electron 10.0.0');
assert.deepStrictEqual(fullChromiumVersions['104.0.5112.65'], ['20.0.0'], 'chromium 104.0.5112.65 maps to electron 20.0.0');
assert.deepStrictEqual(fullChromiumVersions['124.0.6367.49'], ['30.0.0'], 'chromium 124.0.6367.49 maps to electron 30.0.0');
assert.deepStrictEqual(fullChromiumVersions['130.0.6723.44'], ['33.0.0-beta.11', '33.0.0'], 'chromium 130.0.6723.44 maps to electron 33.0.0');
assert.deepStrictEqual(getElectronVersionsForChromium('130.0.6723.44'), ['33.0.0-beta.11', '33.0.0'], 'helper getElectronVersionsForChromium resolves 130.0.6723.44');

// 4. fullChromiumVersions returns undefined for unmapped or non-existent Chromium versions
assert.strictEqual(fullChromiumVersions['999.0.0.0'], undefined, 'non-existent version returns undefined');
assert.strictEqual(fullChromiumVersions['invalid-version'], undefined, 'invalid version key returns undefined');
assert.strictEqual(getElectronVersionsForChromium('999.0.0.0'), undefined, 'helper returns undefined for non-existent version');
assert.strictEqual(getElectronVersionsForChromium(null), undefined, 'helper returns undefined for non-string input');
assert.strictEqual(getElectronVersionsForChromium(130), undefined, 'helper returns undefined for numeric input');

// 5. fullChromiumVersions contains string keys and array of string values
assert.ok(keys.length > 0, 'fullChromiumVersions has keys');
assert.ok(keys.every(k => typeof k === 'string' && Array.isArray(fullChromiumVersions[k]) && fullChromiumVersions[k].every(v => typeof v === 'string')), 'keys are strings and values are string arrays');

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