@types/node-cron 3.0.11

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/node-cron@3.0.11
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/%40types/node-cron@3.0.11

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:sha256:9a0c4e6cc6d03a528e46df83211475857fc4bf7840a1207e1a318fafb8ae6d4c","contract":["@types/node-cron package.json declares type definitions entry point index.d.ts and version 3.0.11","@types/node-cron index.d.ts exports schedule function declaration returning ScheduledTask","@types/node-cron index.d.ts exports validate function declaration returning boolean","@types/node-cron index.d.ts exports getTasks function declaration returning Map of tasks","@types/node-cron index.d.ts declares ScheduledTask interface extending EventEmitter with now, start, and stop methods","@types/node-cron index.d.ts declares ScheduleOptions interface with scheduled, timezone, recoverMissedExecutions, name, and runOnInit options"],"goal":"verify pkg:npm/%40types/node-cron@3.0.11","kind":"HOW","packages":["pkg:npm/%40types/node-cron@3.0.11"],"schemaVersion":1},"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/%40types/node-cron@3.0.11"],"schemaVersion":1,"subject":"pkg:npm/%40types/node-cron@3.0.11","verifierAdapter":"node-typescript@1"}

{
  "name": "sample-types-node-cron",
  "version": "1.0.0",
  "lockfileVersion": 3,
  "requires": true,
  "packages": {
    "": {
      "name": "sample-types-node-cron",
      "version": "1.0.0",
      "license": "MIT-0",
      "dependencies": {
        "@types/node-cron": "3.0.11"
      }
    },
    "node_modules/@types/node-cron": {
      "version": "3.0.11",
      "resolved": "https://registry.npmjs.org/@types/node-cron/-/node-cron-3.0.11.tgz",
      "integrity": "sha512-0ikrnug3/IyneSHqCBeslAhlK2aBfYek1fGo4bP4QnZPmiqSGRK+Oy7ZMisLWkesffJvQ1cqAcBnJC+8+nxIAg==",
      "license": "MIT"
    }
  }
}

{
  "name": "sample-types-node-cron",
  "version": "1.0.0",
  "private": true,
  "type": "module",
  "license": "MIT-0",
  "dependencies": {
    "@types/node-cron": "3.0.11"
  }
}

{
  "schemaVersion": 1,
  "goal": "verify pkg:npm/%40types/node-cron@3.0.11",
  "kind": "HOW",
  "packages": [
    "pkg:npm/%40types/node-cron@3.0.11"
  ]
}

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

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

// 1. @types/node-cron package.json declares type definitions entry point index.d.ts and version 3.0.11
const pkgJsonPath = require.resolve('@types/node-cron/package.json');
assert.ok(fs.existsSync(pkgJsonPath), 'package.json must exist');
const pkgJson = JSON.parse(fs.readFileSync(pkgJsonPath, 'utf8'));
assert.equal(pkgJson.name, '@types/node-cron', 'Package name must be @types/node-cron');
assert.equal(pkgJson.version, '3.0.11', 'Package version must be 3.0.11');
assert.equal(pkgJson.types, 'index.d.ts', 'Types field must point to index.d.ts');

const pkgDir = path.dirname(pkgJsonPath);
const dtsPath = path.join(pkgDir, 'index.d.ts');
assert.ok(fs.existsSync(dtsPath), 'index.d.ts must exist');
const dtsContent = fs.readFileSync(dtsPath, 'utf8');

// 2. @types/node-cron index.d.ts exports schedule function declaration returning ScheduledTask
assert.ok(
  dtsContent.includes('export function schedule(') &&
  dtsContent.includes('cronExpression: string') &&
  dtsContent.includes('func: ((now: Date | "manual" | "init") => void) | string') &&
  dtsContent.includes('options?: ScheduleOptions') &&
  dtsContent.includes('): ScheduledTask;'),
  'schedule function declaration must match expected signature'
);

// 3. @types/node-cron index.d.ts exports validate function declaration returning boolean
assert.ok(
  dtsContent.includes('export function validate(cronExpression: string): boolean;'),
  'validate function declaration must match expected signature'
);

// 4. @types/node-cron index.d.ts exports getTasks function declaration returning Map of tasks
assert.ok(
  dtsContent.includes('export function getTasks(): Map<string, ScheduledTask>;'),
  'getTasks function declaration must match expected signature'
);

// 5. @types/node-cron index.d.ts declares ScheduledTask interface extending EventEmitter with now, start, and stop methods
assert.ok(
  dtsContent.includes('export interface ScheduledTask extends EventEmitter {') &&
  dtsContent.includes('now: (now?: Date) => void;') &&
  dtsContent.includes('start: () => void;') &&
  dtsContent.includes('stop: () => void;'),
  'ScheduledTask interface must declare now, start, and stop methods'
);

// 6. @types/node-cron index.d.ts declares ScheduleOptions interface with scheduled, timezone, recoverMissedExecutions, name, and runOnInit options
assert.ok(
  dtsContent.includes('export interface ScheduleOptions {') &&
  dtsContent.includes('scheduled?: boolean | undefined;') &&
  dtsContent.includes('timezone?: string;') &&
  dtsContent.includes('recoverMissedExecutions?: boolean;') &&
  dtsContent.includes('name?: string;') &&
  dtsContent.includes('runOnInit?: boolean;'),
  'ScheduleOptions interface must declare expected options'
);

console.log('Contract for @types/node-cron passed successfully.');