@vitest/utils 4.1.10: slash

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 @vitest/utils.slash in pkg:npm/%40vitest/utils@4.1.10
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/%40vitest/utils@4.1.10
Demonstrate these symbols/APIs:
  - @vitest/utils.slash

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:sha256:007b787bd92abf955e51427cbbd66a56b43f2d36ef11262d2bbae4916f46a602","contract":["slash converts Windows-style backslashes to forward slashes in relative paths","slash preserves existing forward slashes in relative paths","slash handles paths containing mixed forward and backward slashes","slash converts consecutive backslashes into consecutive forward slashes","slash converts trailing backslashes and preserves empty strings"],"goal":"verify @vitest/utils.slash in pkg:npm/%40vitest/utils@4.1.10","kind":"HOW","packages":["pkg:npm/%40vitest/utils@4.1.10"],"schemaVersion":1,"symbols":["@vitest/utils.slash"]},"contractCommand":["node","test/contract.mjs"],"environment":{"arch":"x64","distro":"ubuntu","ecosystem":"npm","libc":"glibc","libcVersion":"2.39","os":"linux","osVersionBucket":"24","packageManager":"npm","schemaVersion":1},"license":"MIT-0","packages":["pkg:npm/%40vitest/utils@4.1.10"],"schemaVersion":1,"subject":"pkg:npm/%40vitest/utils@4.1.10","symbols":["@vitest/utils.slash"],"verifierAdapter":"node-typescript@1"}

import { slash } from '@vitest/utils/helpers';

export { slash };

export function normalizePath(path) {
  return slash(path);
}

{
  "name": "sample-vitest-utils-slash",
  "version": "1.0.0",
  "lockfileVersion": 3,
  "requires": true,
  "packages": {
    "": {
      "name": "sample-vitest-utils-slash",
      "version": "1.0.0",
      "dependencies": {
        "@vitest/utils": "4.1.10"
      }
    },
    "node_modules/@vitest/pretty-format": {
      "version": "4.1.10",
      "resolved": "https://registry.npmjs.org/@vitest/pretty-format/-/pretty-format-4.1.10.tgz",
      "integrity": "sha512-W1HsjSH4MXQ9YfmmhLAoIYf1HRfekQCGngeIgcei6MP5QQGWUe0gkopdZQaVCFO+JDJMrAJGwa5pRpNpvy4P8Q==",
      "license": "MIT",
      "dependencies": {
        "tinyrainbow": "^3.1.0"
      },
      "funding": {
        "url": "https://opencollective.com/vitest"
      }
    },
    "node_modules/@vitest/utils": {
      "version": "4.1.10",
      "resolved": "https://registry.npmjs.org/@vitest/utils/-/utils-4.1.10.tgz",
      "integrity": "sha512-fy9am/HWxbaGt/Sawrp90vt6Y6jQwf1RX77cz3uwoJwJVMli/e1IEwRPnMNJ7vKfPTwo0diXifkpPvwH9v7nGA==",
      "license": "MIT",
      "dependencies": {
        "@vitest/pretty-format": "4.1.10",
        "convert-source-map": "^2.0.0",
        "tinyrainbow": "^3.1.0"
      },
      "funding": {
        "url": "https://opencollective.com/vitest"
      }
    },
    "node_modules/convert-source-map": {
      "version": "2.0.0",
      "resolved": "https://registry.npmjs.org/convert-source-map/-/convert-source-map-2.0.0.tgz",
      "integrity": "sha512-Kvp459HrV2FEJ1CAsi1Ku+MY3kasH19TFykTz2xWmMeq6bk2NU3XXvfJ+Q61m0xktWwt+1HSYf3JZsTms3aRJg==",
      "license": "MIT"
    },
    "node_modules/tinyrainbow": {
      "version": "3.1.1",
      "resolved": "https://registry.npmjs.org/tinyrainbow/-/tinyrainbow-3.1.1.tgz",
      "integrity": "sha512-yau8yJdTt989Mm0Bd/236QnzEiPf2xLLTqUZRUJOo/3CB078LSwzei343DgtJVmfJKJE3TMINY1u42SQsP6mXw==",
      "license": "MIT",
      "engines": {
        "node": ">=14.0.0"
      }
    }
  }
}

{
  "name": "sample-vitest-utils-slash",
  "version": "1.0.0",
  "type": "module",
  "main": "index.mjs",
  "scripts": {
    "test": "node test/contract.mjs"
  },
  "dependencies": {
    "@vitest/utils": "4.1.10"
  }
}

{
  "schemaVersion": 1,
  "goal": "verify @vitest/utils.slash in pkg:npm/%40vitest/utils@4.1.10",
  "kind": "HOW",
  "packages": [
    "pkg:npm/%40vitest/utils@4.1.10"
  ],
  "symbols": [
    "@vitest/utils.slash"
  ]
}

import assert from 'node:assert/strict';
import { slash } from '@vitest/utils/helpers';
import { normalizePath } from '../index.mjs';

// 1. slash converts Windows-style backslashes to forward slashes in relative paths
{
  assert.equal(slash('foo\\bar\\baz'), 'foo/bar/baz');
  assert.equal(slash('src\\components\\Button.tsx'), 'src/components/Button.tsx');
  assert.equal(normalizePath('foo\\bar\\baz'), 'foo/bar/baz');
}

// 2. slash preserves existing forward slashes in relative paths
{
  assert.equal(slash('already/clean/relative/path.js'), 'already/clean/relative/path.js');
  assert.equal(slash('deeply/nested/dir/structure'), 'deeply/nested/dir/structure');
  assert.equal(normalizePath('already/clean/relative/path.js'), 'already/clean/relative/path.js');
}

// 3. slash handles paths containing mixed forward and backward slashes
{
  assert.equal(slash('sub/folder\\nested/file.txt'), 'sub/folder/nested/file.txt');
  assert.equal(slash('src\\utils/helpers\\index.js'), 'src/utils/helpers/index.js');
  assert.equal(normalizePath('sub/folder\\nested/file.txt'), 'sub/folder/nested/file.txt');
}

// 4. slash converts consecutive backslashes into consecutive forward slashes
{
  assert.equal(slash('repeat\\\\slash\\\\double'), 'repeat//slash//double');
  assert.equal(slash('foo\\\\\\bar'), 'foo///bar');
  assert.equal(normalizePath('repeat\\\\slash\\\\double'), 'repeat//slash//double');
}

// 5. slash converts trailing backslashes and preserves empty strings
{
  assert.equal(slash('trailing\\folder\\'), 'trailing/folder/');
  assert.equal(slash('single_file.txt'), 'single_file.txt');
  assert.equal(slash(''), '');
  assert.equal(normalizePath(''), '');
}

console.log('All @vitest/utils slash contract assertions passed.');