bare-path 3.1.1: dirname

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 bare-path.dirname in pkg:npm/bare-path@3.1.1
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/bare-path@3.1.1
Demonstrate these symbols/APIs:
  - bare-path.dirname

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:f1957aea84596ea6ab8cb620d65a58070961e20df603ee4a9453dbbf726bde93","contract":["bare-path exports dirname function directly and under posix/win32 namespaces","bare-path dirname extracts the parent directory path from posix paths","bare-path dirname handles root, relative, empty, and trailing slash paths according to posix specifications","bare-path dirname handles windows drive letters and UNC network paths on win32","bare-path dirname throws TypeError when input is not a string"],"goal":"verify bare-path.dirname in pkg:npm/bare-path@3.1.1","kind":"HOW","packages":["pkg:npm/bare-path@3.1.1"],"schemaVersion":1,"symbols":["bare-path.dirname"]},"contractCommand":["node","test/contract.cjs"],"environment":{"arch":"x64","distro":"ubuntu","ecosystem":"npm","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/bare-path@3.1.1"],"schemaVersion":1,"subject":"pkg:npm/bare-path@3.1.1","symbols":["bare-path.dirname"],"verifierAdapter":"node-typescript@1"}

'use strict';

// Bare environment compatibility bootstrap when running in Node.js
if (typeof Bare === 'undefined') {
  global.Bare = { platform: process.platform };
}
const origJsExtension = require.extensions['.js'];
require.extensions['.js'] = function (module, filename) {
  if (filename.endsWith('binding.js') && filename.includes('bare-path')) {
    module.exports = {
      cwd: () => process.cwd()
    };
    return;
  }
  return origJsExtension(module, filename);
};

const path = require('bare-path');

/**
 * Extracts directory name from a given path using bare-path.
 * @param {string} filepath
 * @returns {string}
 */
function getDirname(filepath) {
  return path.dirname(filepath);
}

/**
 * Extracts directory name specifically for POSIX paths.
 * @param {string} filepath
 * @returns {string}
 */
function getPosixDirname(filepath) {
  return path.posix.dirname(filepath);
}

/**
 * Extracts directory name specifically for Win32 paths.
 * @param {string} filepath
 * @returns {string}
 */
function getWin32Dirname(filepath) {
  return path.win32.dirname(filepath);
}

module.exports = {
  path,
  getDirname,
  getPosixDirname,
  getWin32Dirname
};

{
  "name": "sample-bare-path-dirname",
  "version": "1.0.0",
  "lockfileVersion": 3,
  "requires": true,
  "packages": {
    "": {
      "name": "sample-bare-path-dirname",
      "version": "1.0.0",
      "dependencies": {
        "bare-path": "3.1.1"
      }
    },
    "node_modules/bare-path": {
      "version": "3.1.1",
      "resolved": "https://registry.npmjs.org/bare-path/-/bare-path-3.1.1.tgz",
      "integrity": "sha512-JprUlveX3QjApC1cTpsUOiscADftCGVWkzitbHsRqv84hzYwYHw2mbluddsq5TvI8mH/8Ov1f4BiMAdcB0oYnQ==",
      "license": "Apache-2.0"
    }
  }
}

{
  "name": "sample-bare-path-dirname",
  "version": "1.0.0",
  "private": true,
  "description": "Clean-room verification of bare-path dirname",
  "dependencies": {
    "bare-path": "3.1.1"
  }
}

{
  "schemaVersion": 1,
  "goal": "verify bare-path.dirname in pkg:npm/bare-path@3.1.1",
  "kind": "HOW",
  "packages": [
    "pkg:npm/bare-path@3.1.1"
  ],
  "symbols": [
    "bare-path.dirname"
  ]
}

'use strict';

const assert = require('node:assert/strict');
const { path, getDirname, getPosixDirname, getWin32Dirname } = require('../index.cjs');

// 1. Verify bare-path exports dirname function directly and under posix/win32 namespaces
assert.equal(typeof path.dirname, 'function', 'path.dirname should be a function');
assert.equal(typeof path.posix.dirname, 'function', 'path.posix.dirname should be a function');
assert.equal(typeof path.win32.dirname, 'function', 'path.win32.dirname should be a function');

// 2. bare-path dirname extracts the parent directory path from posix paths
assert.equal(getDirname('/mock/dir/file.txt'), '/mock/dir');
assert.equal(getDirname('/sample/nested/path'), '/sample/nested');
assert.equal(getPosixDirname('/mock_app/assets/image.png'), '/mock_app/assets');

// 3. bare-path dirname handles root, relative, empty, and trailing slash paths according to posix specifications
assert.equal(getDirname('/sample'), '/');
assert.equal(getDirname('/'), '/');
assert.equal(getDirname('///'), '/');
assert.equal(getDirname('sample/dir'), 'sample');
assert.equal(getDirname('sample'), '.');
assert.equal(getDirname(''), '.');
assert.equal(getDirname('/sample/dir/'), '/sample');

// 4. bare-path dirname handles windows paths on win32 namespace
const drive = 'D:';
const sep = '\\';
const winFilePath = [drive, 'mock_dir', 'file.txt'].join(sep);
const winExpectedDir = [drive, 'mock_dir'].join(sep);
assert.equal(getWin32Dirname(winFilePath), winExpectedDir);

const winRootPath = drive + sep + 'mock_dir';
const winExpectedRoot = drive + sep;
assert.equal(getWin32Dirname(winRootPath), winExpectedRoot);

// 5. bare-path dirname throws TypeError when input is not a string
assert.throws(() => {
  path.dirname(null);
}, {
  name: 'TypeError'
});

assert.throws(() => {
  path.dirname(123);
}, {
  name: 'TypeError'
});

assert.throws(() => {
  path.dirname(undefined);
}, {
  name: 'TypeError'
});

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