@types/yauzl 2.10.3

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/%40types/yauzl@2.10.3
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/%40types/yauzl@2.10.3
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:sha256:6aaf393d84ad313e3fee0077d64dc7c15e8721fe502483b7a8c1cd1a520fcb8c","constraints":{"executionContext":"node"},"contract":["@types/yauzl package.json declares type definitions entry point index.d.ts and version 2.10.3","@types/yauzl package.json specifies dependency on @types/node","@types/yauzl index.d.ts declares RandomAccessReader abstract class extending EventEmitter","@types/yauzl index.d.ts declares Entry and ZipFile class types","@types/yauzl index.d.ts declares ZipFileOptions and Options interfaces","@types/yauzl index.d.ts exports open, fromFd, fromBuffer, fromRandomAccessReader, dosDateTimeToDate, and validateFileName functions"],"goal":"verify pkg:npm/%40types/yauzl@2.10.3","kind":"HOW","packages":["pkg:npm/%40types/yauzl@2.10.3"],"schemaVersion":1},"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/%40types/yauzl@2.10.3"],"schemaVersion":1,"subject":"pkg:npm/%40types/yauzl@2.10.3","verifierAdapter":"node-typescript@1"}

{
  "name": "sample-types-yauzl",
  "version": "1.0.0",
  "lockfileVersion": 3,
  "requires": true,
  "packages": {
    "": {
      "name": "sample-types-yauzl",
      "version": "1.0.0",
      "license": "MIT-0",
      "dependencies": {
        "@types/yauzl": "2.10.3"
      }
    },
    "node_modules/@types/node": {
      "version": "26.2.0",
      "resolved": "https://registry.npmjs.org/@types/node/-/node-26.2.0.tgz",
      "integrity": "sha512-5IviulTZeRNp2vAJ514cc/HUlY5nZ9fCbq9DMyC52BrhFZACo3nI0R7qBxhQmo/d27NFe96ur/b7Wwxklda+kg==",
      "license": "MIT",
      "dependencies": {
        "undici-types": "~8.3.0"
      }
    },
    "node_modules/@types/yauzl": {
      "version": "2.10.3",
      "resolved": "https://registry.npmjs.org/@types/yauzl/-/yauzl-2.10.3.tgz",
      "integrity": "sha512-oJoftv0LSuaDZE3Le4DbKX+KS9G36NzOeSap90UIK0yMA/NhKJhqlSGtNDORNRaIbQfzjXDrQa0ytJ6mNRGz/Q==",
      "license": "MIT",
      "dependencies": {
        "@types/node": "*"
      }
    },
    "node_modules/undici-types": {
      "version": "8.3.0",
      "resolved": "https://registry.npmjs.org/undici-types/-/undici-types-8.3.0.tgz",
      "integrity": "sha512-j375ScV60dom+YkPFIfTLcOiPxkN/buHz5GobjLhixFuANaNs3C9l4GmrWqejgXWJ7BbJcFYpTEUkS1Ge8bpZQ==",
      "license": "MIT"
    }
  }
}

{
  "name": "sample-types-yauzl",
  "version": "1.0.0",
  "type": "module",
  "private": true,
  "license": "MIT-0",
  "dependencies": {
    "@types/yauzl": "2.10.3"
  }
}

{
  "schemaVersion": 1,
  "goal": "verify pkg:npm/%40types/yauzl@2.10.3",
  "kind": "HOW",
  "packages": [
    "pkg:npm/%40types/yauzl@2.10.3"
  ],
  "constraints": {
    "executionContext": "node"
  },
  "runtimeConditions": {
    "ecosystem": "npm",
    "language": "javascript",
    "moduleSystem": "cjs",
    "packageManager": "npm@10.9.8",
    "runtime": "node@22.23.2"
  }
}

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

const require = createRequire(import.meta.url);

// 1. @types/yauzl package.json declares type definitions entry point index.d.ts and version 2.10.3
const pkgJson = require('@types/yauzl/package.json');
assert.equal(pkgJson.name, '@types/yauzl');
assert.equal(pkgJson.version, '2.10.3');
assert.equal(pkgJson.types, 'index.d.ts');

// 2. @types/yauzl package.json specifies dependency on @types/node
assert.ok(pkgJson.dependencies['@types/node']);

// 3. @types/yauzl index.d.ts declares RandomAccessReader abstract class extending EventEmitter
const dtsPath = require.resolve('@types/yauzl/index.d.ts');
assert.ok(fs.existsSync(dtsPath));
const dtsContent = fs.readFileSync(dtsPath, 'utf8');

assert.ok(dtsContent.includes('export abstract class RandomAccessReader extends EventEmitter {'));
assert.ok(dtsContent.includes('createReadStream(options: { start: number; end: number }): void;'));
assert.ok(dtsContent.includes('read(buffer: Buffer, offset: number, length: number, position: number, callback: (err: Error | null) => void): void;'));

// 4. @types/yauzl index.d.ts declares Entry and ZipFile class types
assert.ok(dtsContent.includes('export class Entry {'));
assert.ok(dtsContent.includes('getLastModDate(): Date;'));
assert.ok(dtsContent.includes('export class ZipFile extends EventEmitter {'));
assert.ok(dtsContent.includes('openReadStream('));
assert.ok(dtsContent.includes('readEntry(): void;'));

// 5. @types/yauzl index.d.ts declares ZipFileOptions and Options interfaces
assert.ok(dtsContent.includes('export interface ZipFileOptions {'));
assert.ok(dtsContent.includes('export interface Options {'));
assert.ok(dtsContent.includes('autoClose?: boolean | undefined;'));
assert.ok(dtsContent.includes('lazyEntries?: boolean | undefined;'));

// 6. @types/yauzl index.d.ts exports open, fromFd, fromBuffer, fromRandomAccessReader, dosDateTimeToDate, and validateFileName functions
assert.ok(dtsContent.includes('export function open('));
assert.ok(dtsContent.includes('export function fromFd('));
assert.ok(dtsContent.includes('export function fromBuffer('));
assert.ok(dtsContent.includes('export function fromRandomAccessReader('));
assert.ok(dtsContent.includes('export function dosDateTimeToDate(date: number, time: number): Date;'));
assert.ok(dtsContent.includes('export function validateFileName(fileName: string): string | null;'));

console.log('All contract tests passed.');