electron-to-chromium 1.5.412

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 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
Constraints:
  - executionContext: node
Required runtime conditions:
  - ecosystem: npm
  - language: javascript
  - moduleSystem: cjs
  - packageManager: npm@10.9.8
  - runtime: node@22.23.2

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:sha256:0209e1dcbe7856c4cf422b30d98f88136a4208a1de889793d821dc91e6a31563","constraints":{"executionContext":"node"},"contract":["electronToChromium maps major and full Electron versions to Chromium versions","chromiumToElectron maps major Chromium versions to Electron strings and full versions to arrays","electronToBrowserList produces Browserslist query strings for Electron versions","versions and fullVersions dictionaries map Electron versions to Chromium versions","chromiumVersions and fullChromiumVersions dictionaries map Chromium versions to Electron versions"],"goal":"verify pkg:npm/electron-to-chromium@1.5.412","kind":"HOW","packages":["pkg:npm/electron-to-chromium@1.5.412"],"schemaVersion":1},"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/electron-to-chromium@1.5.412"],"schemaVersion":1,"subject":"pkg:npm/electron-to-chromium@1.5.412","verifierAdapter":"node-typescript@1"}

{
  "name": "electron-to-chromium-sample",
  "version": "1.0.0",
  "lockfileVersion": 3,
  "requires": true,
  "packages": {
    "": {
      "name": "electron-to-chromium-sample",
      "version": "1.0.0",
      "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": "electron-to-chromium-sample",
  "version": "1.0.0",
  "private": true,
  "description": "Clean-room verification sample for electron-to-chromium",
  "dependencies": {
    "electron-to-chromium": "1.5.412"
  }
}

{
  "schemaVersion": 1,
  "goal": "verify pkg:npm/electron-to-chromium@1.5.412",
  "kind": "HOW",
  "packages": [
    "pkg:npm/electron-to-chromium@1.5.412"
  ],
  "constraints": {
    "executionContext": "node"
  },
  "runtimeConditions": {
    "ecosystem": "npm",
    "language": "javascript",
    "moduleSystem": "cjs",
    "packageManager": "npm@10.9.8",
    "runtime": "node@22.23.2"
  }
}

const assert = require('node:assert');
const etc = require('electron-to-chromium');

// 1. electronToChromium maps major and full Electron versions to Chromium versions
assert.strictEqual(etc.electronToChromium('3.0'), '66');
assert.strictEqual(etc.electronToChromium('3.0.0'), '66.0.3359.181');
assert.strictEqual(etc.electronToChromium(1), '49');
assert.strictEqual(etc.electronToChromium('9999.0.0'), undefined);

// 2. chromiumToElectron maps major Chromium versions to Electron strings and full versions to arrays
assert.strictEqual(etc.chromiumToElectron('66'), '3.0');
assert.strictEqual(etc.chromiumToElectron(66), '3.0');
const electronVersions = etc.chromiumToElectron('66.0.3359.181');
assert(Array.isArray(electronVersions));
assert(electronVersions.includes('3.0.0'));
assert.strictEqual(etc.chromiumToElectron('99999'), undefined);

// 3. electronToBrowserList produces Browserslist query strings for Electron versions
assert.strictEqual(etc.electronToBrowserList('3.0'), 'Chrome >= 66');
assert.strictEqual(etc.electronToBrowserList(1), 'Chrome >= 49');
assert.strictEqual(etc.electronToBrowserList('9999'), undefined);

// 4. versions and fullVersions dictionaries map Electron versions to Chromium versions
assert.strictEqual(typeof etc.versions, 'object');
assert.strictEqual(etc.versions['3.0'], '66');
assert.strictEqual(typeof etc.fullVersions, 'object');
assert.strictEqual(etc.fullVersions['3.0.0'], '66.0.3359.181');

// 5. chromiumVersions and fullChromiumVersions dictionaries map Chromium versions to Electron versions
assert.strictEqual(typeof etc.chromiumVersions, 'object');
assert.strictEqual(etc.chromiumVersions['66'], '3.0');
assert.strictEqual(typeof etc.fullChromiumVersions, 'object');
assert(Array.isArray(etc.fullChromiumVersions['66.0.3359.181']));
assert(etc.fullChromiumVersions['66.0.3359.181'].includes('3.0.0'));

console.log('Contract passed');