process-nextick-args 2.0.1: process-nextick-args

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 process-nextick-args in pkg:npm/process-nextick-args@2.0.1
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/process-nextick-args@2.0.1
Demonstrate these symbols/APIs:
  - process-nextick-args

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:b7007530d82c4f431b78426b536cd56248c13e5b327af6a367a251f4077d54c3","contract":["nextTick schedules callback execution asynchronously on next tick","nextTick passes a single argument to the callback","nextTick passes multiple arguments to the callback","nextTick passes four or more arguments to the callback","nextTick preserves callback execution order FIFO","nextTick throws TypeError when callback is not a function"],"goal":"verify process-nextick-args in pkg:npm/process-nextick-args@2.0.1","kind":"HOW","packages":["pkg:npm/process-nextick-args@2.0.1"],"schemaVersion":1,"symbols":["process-nextick-args"]},"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/process-nextick-args@2.0.1"],"schemaVersion":1,"subject":"pkg:npm/process-nextick-args@2.0.1","symbols":["process-nextick-args"],"verifierAdapter":"node-typescript@1"}

{
  "name": "process-nextick-args-verification",
  "version": "1.0.0",
  "lockfileVersion": 3,
  "requires": true,
  "packages": {
    "": {
      "name": "process-nextick-args-verification",
      "version": "1.0.0",
      "dependencies": {
        "process-nextick-args": "2.0.1"
      }
    },
    "node_modules/process-nextick-args": {
      "version": "2.0.1",
      "resolved": "https://registry.npmjs.org/process-nextick-args/-/process-nextick-args-2.0.1.tgz",
      "integrity": "sha512-3ouUOpQhtgrbOa17J7+uxOTpITYWaGP7/AhoR3+A+/1e9skrzelGi/dXzEYyvbxubEF6Wn2ypscTKiKJFFn1ag==",
      "license": "MIT"
    }
  }
}

{
  "name": "process-nextick-args-verification",
  "version": "1.0.0",
  "private": true,
  "description": "Clean-room verification for process-nextick-args",
  "type": "module",
  "dependencies": {
    "process-nextick-args": "2.0.1"
  }
}

{
  "schemaVersion": 1,
  "goal": "verify process-nextick-args in pkg:npm/process-nextick-args@2.0.1",
  "kind": "HOW",
  "packages": [
    "pkg:npm/process-nextick-args@2.0.1"
  ],
  "symbols": [
    "process-nextick-args"
  ]
}

import assert from 'node:assert';
import pna from 'process-nextick-args';

function waitTicks(count = 1) {
  return new Promise((resolve) => {
    let remaining = count;
    function next() {
      if (--remaining <= 0) {
        resolve();
      } else {
        pna.nextTick(next);
      }
    }
    pna.nextTick(next);
  });
}

// 1. nextTick schedules callback execution asynchronously on next tick
let called = false;
pna.nextTick(() => {
  called = true;
});
assert.strictEqual(called, false);
await waitTicks(1);
assert.strictEqual(called, true);

// 2. nextTick passes a single argument to the callback
let receivedSingle = null;
pna.nextTick((val) => {
  receivedSingle = val;
}, 'hello');
await waitTicks(1);
assert.strictEqual(receivedSingle, 'hello');

// 3. nextTick passes multiple arguments to the callback
let receivedMultiple = null;
pna.nextTick((a, b, c) => {
  receivedMultiple = [a, b, c];
}, 1, 'two', { key: 'value' });
await waitTicks(1);
assert.deepStrictEqual(receivedMultiple, [1, 'two', { key: 'value' }]);

// 4. nextTick passes four or more arguments to the callback
let receivedMany = null;
pna.nextTick((a, b, c, d, e) => {
  receivedMany = [a, b, c, d, e];
}, 10, 20, 30, 40, 50);
await waitTicks(1);
assert.deepStrictEqual(receivedMany, [10, 20, 30, 40, 50]);

// 5. nextTick preserves callback execution order FIFO
const order = [];
pna.nextTick(() => order.push(1));
pna.nextTick(() => order.push(2));
pna.nextTick(() => order.push(3));
await waitTicks(1);
assert.deepStrictEqual(order, [1, 2, 3]);

// 6. nextTick throws TypeError when callback is not a function
assert.throws(
  () => pna.nextTick(null),
  {
    name: 'TypeError'
  }
);
assert.throws(
  () => pna.nextTick('not-a-fn'),
  {
    name: 'TypeError'
  }
);

console.log('Contract passed');