resolve-from 5.0.0: silent

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 resolve-from.silent in pkg:npm/resolve-from@5.0.0
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/resolve-from@5.0.0
Demonstrate these symbols/APIs:
  - resolve-from.silent

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:sha256:34d9a5fadc3cf4eefddecf63a1d52219c4167ac5ed54dce6ee6a51170c09e2b0","contract":["resolve-from.silent resolves an installed package module path from a target directory","resolve-from.silent returns undefined when a module cannot be found instead of throwing","resolve-from.silent resolves relative file paths relative to the specified directory","resolve-from.silent returns undefined for nonexistent relative file paths","resolve-from.silent resolves Node.js built-in core modules","resolve-from.silent throws a TypeError when fromDirectory argument is not a string","resolve-from.silent throws a TypeError when moduleId argument is not a string"],"goal":"verify resolve-from.silent in pkg:npm/resolve-from@5.0.0","kind":"HOW","packages":["pkg:npm/resolve-from@5.0.0"],"schemaVersion":1,"symbols":["resolve-from.silent"]},"contractCommand":["node","test/contract.mjs"],"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/resolve-from@5.0.0"],"schemaVersion":1,"subject":"pkg:npm/resolve-from@5.0.0","symbols":["resolve-from.silent"],"verifierAdapter":"node-typescript@1"}

{
  "name": "sample-resolve-from",
  "version": "1.0.0",
  "lockfileVersion": 3,
  "requires": true,
  "packages": {
    "": {
      "name": "sample-resolve-from",
      "version": "1.0.0",
      "license": "MIT-0",
      "dependencies": {
        "resolve-from": "5.0.0"
      }
    },
    "node_modules/resolve-from": {
      "version": "5.0.0",
      "resolved": "https://registry.npmjs.org/resolve-from/-/resolve-from-5.0.0.tgz",
      "integrity": "sha512-qYg9KP24dD5qka9J47d0aVky0N+b4fTU89LN9iDnjB5waksiC49rvMB0PrUJQGoTmH50XPiqOvAjDfaijGxYZw==",
      "license": "MIT",
      "engines": {
        "node": ">=8"
      }
    }
  }
}

{
  "name": "sample-resolve-from",
  "version": "1.0.0",
  "private": true,
  "description": "Clean-room verification of resolve-from.silent",
  "main": "src/index.js",
  "license": "MIT-0",
  "dependencies": {
    "resolve-from": "5.0.0"
  }
}

{
  "schemaVersion": 1,
  "goal": "verify resolve-from.silent in pkg:npm/resolve-from@5.0.0",
  "kind": "HOW",
  "packages": [
    "pkg:npm/resolve-from@5.0.0"
  ],
  "symbols": [
    "resolve-from.silent"
  ]
}

const resolveFrom = require('resolve-from');

/**
 * Resolves a module id from a given directory silently (returns undefined if not found).
 *
 * @param {string} fromDirectory - Directory to resolve from.
 * @param {string} moduleId - Module id or path to resolve.
 * @returns {string|undefined} Resolved module path or undefined.
 */
function resolveSilent(fromDirectory, moduleId) {
  return resolveFrom.silent(fromDirectory, moduleId);
}

module.exports = {
  resolveSilent,
  silent: resolveFrom.silent
};

import assert from 'node:assert/strict';
import fs from 'node:fs';
import os from 'node:os';
import path from 'node:path';
import { createRequire } from 'node:module';

const require = createRequire(import.meta.url);
const { silent, resolveSilent } = require('../src/index.js');

async function runTests() {
  const tmpDir = fs.mkdtempSync(path.join(os.tmpdir(), 'csx-rf-silent-test-'));

  try {
    // Setup temporary fixture files
    const localModule = path.join(tmpDir, 'helper.js');
    fs.writeFileSync(localModule, 'module.exports = { ok: true };', 'utf8');

    const pkgDir = path.join(tmpDir, 'node_modules', 'fixture-pkg');
    fs.mkdirSync(pkgDir, { recursive: true });
    fs.writeFileSync(
      path.join(pkgDir, 'package.json'),
      JSON.stringify({ name: 'fixture-pkg', main: 'entry.js' }),
      'utf8'
    );
    fs.writeFileSync(path.join(pkgDir, 'entry.js'), 'module.exports = "entry";', 'utf8');

    // 1. resolve-from.silent resolves an installed package module path from a target directory
    const resolvedPkg = silent(tmpDir, 'fixture-pkg');
    assert.strictEqual(resolvedPkg, path.join(pkgDir, 'entry.js'));
    const resolvedPkgHelper = resolveSilent(tmpDir, 'fixture-pkg');
    assert.strictEqual(resolvedPkgHelper, path.join(pkgDir, 'entry.js'));

    // 2. resolve-from.silent returns undefined when a module cannot be found instead of throwing
    const missingPkg = silent(tmpDir, 'non-existent-module-xyz');
    assert.strictEqual(missingPkg, undefined);
    const missingPkgHelper = resolveSilent(tmpDir, 'non-existent-module-xyz');
    assert.strictEqual(missingPkgHelper, undefined);

    // 3. resolve-from.silent resolves relative file paths relative to the specified directory
    const resolvedRel = silent(tmpDir, './helper.js');
    assert.strictEqual(resolvedRel, localModule);

    // 4. resolve-from.silent returns undefined for nonexistent relative file paths
    const missingRel = silent(tmpDir, './missing-file.js');
    assert.strictEqual(missingRel, undefined);

    // 5. resolve-from.silent resolves Node.js built-in core modules
    const resolvedCore = silent(tmpDir, 'path');
    assert.strictEqual(resolvedCore, 'path');

    // 6. resolve-from.silent throws a TypeError when fromDirectory argument is not a string
    assert.throws(
      () => silent(12345, 'fixture-pkg'),
      (err) => err instanceof TypeError && err.message.includes('Expected `fromDir` to be of type `string`')
    );

    // 7. resolve-from.silent throws a TypeError when moduleId argument is not a string
    assert.throws(
      () => silent(tmpDir, null),
      (err) => err instanceof TypeError && err.message.includes('Expected `moduleId` to be of type `string`')
    );

    console.log('All contract assertions for resolve-from.silent passed successfully.');
  } finally {
    fs.rmSync(tmpDir, { recursive: true, force: true });
  }
}

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