temp 0.9.4: mkdirSync

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 temp.mkdirSync in pkg:npm/temp@0.9.4
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/temp@0.9.4
Demonstrate these symbols/APIs:
  - temp.mkdirSync

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:f79d211bbd07cffdfd7aa4a5f2167071364f7f65d53b879b85d9811fe130dae3","contract":["temp.mkdirSync creates a temporary directory synchronously with default prefix and returns its path","temp.mkdirSync creates a directory synchronously using a custom string prefix","temp.mkdirSync creates a directory synchronously using custom prefix and suffix options","temp.mkdirSync creates a directory synchronously inside a specified parent directory","temp.mkdirSync registers created directory for synchronous cleanup when tracking is enabled","temp.mkdirSync throws an error synchronously when given an invalid affix declaration"],"goal":"verify temp.mkdirSync in pkg:npm/temp@0.9.4","kind":"HOW","packages":["pkg:npm/temp@0.9.4"],"schemaVersion":1,"symbols":["temp.mkdirSync"]},"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/temp@0.9.4"],"schemaVersion":1,"subject":"pkg:npm/temp@0.9.4","symbols":["temp.mkdirSync"],"verifierAdapter":"node-typescript@1"}

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}

{
  "name": "sample-temp-mkdir-sync",
  "version": "1.0.0",
  "private": true,
  "description": "Clean-room code sample for temp.mkdirSync",
  "main": "src/index.js",
  "license": "MIT-0",
  "dependencies": {
    "temp": "0.9.4"
  }
}

{
  "schemaVersion": 1,
  "goal": "verify temp.mkdirSync in pkg:npm/temp@0.9.4",
  "kind": "HOW",
  "packages": [
    "pkg:npm/temp@0.9.4"
  ],
  "symbols": [
    "temp.mkdirSync"
  ]
}

const temp = require('temp');

/**
 * Synchronously creates a temporary directory using temp.mkdirSync.
 *
 * @param {string|object} [affixes] - Affixes or options for directory creation.
 * @returns {string} The path to the created directory.
 */
function createTempDirSync(affixes) {
  return temp.mkdirSync(affixes);
}

module.exports = {
  temp,
  mkdirSync: temp.mkdirSync,
  createTempDirSync
};

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 { temp, mkdirSync, createTempDirSync } = require('../src/index.js');

async function runTests() {
  // 1. temp.mkdirSync creates a temporary directory synchronously with default prefix and returns its path
  const dir1 = mkdirSync();
  assert(typeof dir1 === 'string', 'mkdirSync should return a string path');
  assert(fs.existsSync(dir1), 'Created directory should exist on filesystem');
  assert(fs.statSync(dir1).isDirectory(), 'Created path should be a directory');
  assert(path.basename(dir1).startsWith('d-'), 'Default prefix should start with d-');

  // 2. temp.mkdirSync creates a directory synchronously using a custom string prefix
  const prefix = 'csx-test-pre-';
  const dir2 = createTempDirSync(prefix);
  assert(fs.existsSync(dir2), 'Created directory with custom prefix should exist');
  assert(path.basename(dir2).startsWith(prefix), 'Directory basename should start with custom prefix');

  // 3. temp.mkdirSync creates a directory synchronously using custom prefix and suffix options
  const dir3 = mkdirSync({ prefix: 'custom-start-', suffix: '.sampledir' });
  assert(fs.existsSync(dir3), 'Created directory with prefix and suffix options should exist');
  assert(path.basename(dir3).startsWith('custom-start-'), 'Directory basename should start with prefix');
  assert(path.basename(dir3).endsWith('.sampledir'), 'Directory basename should end with suffix');

  // 4. temp.mkdirSync creates a directory synchronously inside a specified parent directory
  const parentDir = fs.mkdtempSync(path.join(os.tmpdir(), 'csx-parent-'));
  const dir4 = mkdirSync({ dir: parentDir, prefix: 'child-' });
  assert(fs.existsSync(dir4), 'Directory inside parent should exist');
  assert.strictEqual(path.dirname(dir4), parentDir, 'Directory parent path should match specified dir');

  // 5. temp.mkdirSync registers created directory for synchronous cleanup when tracking is enabled
  temp.track();
  const dir5 = mkdirSync('tracked-dir-');
  assert(fs.existsSync(dir5), 'Tracked directory should exist before cleanup');
  const cleanupResult = temp.cleanupSync();
  assert(typeof cleanupResult === 'object' && cleanupResult !== null, 'cleanupSync should return stats object');
  assert(cleanupResult.dirs >= 1, 'cleanupSync should report at least 1 directory cleaned up');
  assert(!fs.existsSync(dir5), 'Tracked directory should be removed after cleanupSync');

  // 6. temp.mkdirSync throws an error synchronously when given an invalid affix declaration
  assert.throws(
    () => mkdirSync(12345),
    (err) => err instanceof Error && /Unknown affix declaration/.test(err.message),
    'mkdirSync should throw Error on invalid affix argument'
  );

  // Clean up remaining test directories
  for (const d of [dir1, dir2, dir3, dir4, parentDir]) {
    try {
      if (fs.existsSync(d)) {
        fs.rmSync(d, { recursive: true, force: true });
      }
    } catch {
      // Ignore cleanup errors
    }
  }

  console.log('All contract assertions for temp.mkdirSync passed successfully.');
}

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