real-require 1.0.0: realRequire

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/real-require@1.0.0
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/real-require@1.0.0
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:sha256:30e91692aeb2374353e4603babfee3b003b984099f651003492652ecda200df3","constraints":{"executionContext":"node"},"contract":["realRequire loads built-in Node.js modules","realRequire loads local CommonJS files via absolute path","realRequire delegates to global __non_webpack__require__ when present","realImport dynamically imports built-in Node.js modules"],"goal":"verify pkg:npm/real-require@1.0.0","kind":"HOW","packages":["pkg:npm/real-require@1.0.0"],"schemaVersion":1,"symbols":["realRequire"]},"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/real-require@1.0.0"],"schemaVersion":1,"subject":"pkg:npm/real-require@1.0.0","symbols":["realRequire"],"verifierAdapter":"node-typescript@1"}

module.exports = {
  name: "sample-module",
  multiply: (a, b) => a * b
};

const { realRequire, realImport } = require("real-require");

module.exports = { realRequire, realImport };

{
  "name": "real-require-sample",
  "version": "1.0.0",
  "lockfileVersion": 3,
  "requires": true,
  "packages": {
    "": {
      "name": "real-require-sample",
      "version": "1.0.0",
      "dependencies": {
        "real-require": "1.0.0"
      }
    },
    "node_modules/real-require": {
      "version": "1.0.0",
      "resolved": "https://registry.npmjs.org/real-require/-/real-require-1.0.0.tgz",
      "integrity": "sha512-P4nbQYQfePJxRSmY+v/KINxVucm4NF3p3s7pJveMTtom52FR4YGltUQLB8idDXwDDWW+eYrWDFbuzUnjoWHF7g==",
      "license": "MIT"
    }
  }
}

{
  "name": "real-require-sample",
  "version": "1.0.0",
  "private": true,
  "description": "Clean-room verification for real-require",
  "main": "index.js",
  "scripts": {
    "test": "node test/contract.cjs"
  },
  "dependencies": {
    "real-require": "1.0.0"
  }
}

{
  "schemaVersion": 1,
  "goal": "verify pkg:npm/real-require@1.0.0",
  "kind": "HOW",
  "packages": [
    "pkg:npm/real-require@1.0.0"
  ],
  "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 path = require("node:path");
const { realRequire, realImport } = require("real-require");

async function testContract() {
  // 1. realRequire loads built-in Node.js modules
  {
    const pathModule = realRequire("node:path");
    assert.strictEqual(typeof pathModule.join, "function", "realRequire should load built-in module path");
    assert.strictEqual(pathModule.join("foo", "bar"), "foo/bar");
  }

  // 2. realRequire loads local CommonJS files via absolute path
  {
    const samplePath = path.resolve(__dirname, "../fixtures/sample.cjs");
    const sampleMod = realRequire(samplePath);
    assert.strictEqual(sampleMod.name, "sample-module", "realRequire should load target cjs module");
    assert.strictEqual(sampleMod.multiply(3, 4), 12, "realRequire module function should compute expected result");
  }

  // 3. realRequire delegates to global __non_webpack__require__ when present
  {
    global.__non_webpack__require__ = (moduleName) => {
      return { delegated: true, moduleName };
    };
    try {
      const delegatedResult = realRequire("bundle-mock-target");
      assert.strictEqual(delegatedResult.delegated, true, "realRequire should use __non_webpack__require__");
      assert.strictEqual(delegatedResult.moduleName, "bundle-mock-target");
    } finally {
      delete global.__non_webpack__require__;
    }
  }

  // 4. realImport dynamically imports built-in Node.js modules
  {
    const fsModule = await realImport("node:fs");
    assert.strictEqual(typeof fsModule.readFileSync, "function", "realImport should dynamically import built-in module");
  }

  console.log("Contract verified successfully.");
}

testContract().catch((err) => {
  console.error("Contract test failed:", err);
  process.exit(1);
});