check-error 2.1.3: compatibleConstructor

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 check-error.compatibleConstructor in pkg:npm/check-error@2.1.3
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/check-error@2.1.3
Demonstrate these symbols/APIs:
  - check-error.compatibleConstructor

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:sha256:3d57342d5d14eb292985354e06efb333f7f611ac72aeedaaae265ec5b2838ebe","contract":["compatibleConstructor matches error instances against matching constructor functions","compatibleConstructor matches error instances against inherited superclass constructor functions","compatibleConstructor matches error instances against another error instance with compatible constructors","compatibleConstructor returns false when constructors do not match or inherit","compatibleConstructor returns false for non-constructor values and throws TypeError for null target"],"goal":"verify check-error.compatibleConstructor in pkg:npm/check-error@2.1.3","kind":"HOW","packages":["pkg:npm/check-error@2.1.3"],"schemaVersion":1,"symbols":["check-error.compatibleConstructor"]},"contractCommand":["node","test/contract.mjs"],"environment":{"arch":"x64","distro":"ubuntu","ecosystem":"npm","executionContext":"node","language":"javascript","libc":"glibc","libcVersion":"2.39","moduleSystem":"esm","os":"linux","osVersionBucket":"24","packageManager":"npm","packageManagerVersion":"10.9.8","runtime":"node","runtimeVersion":"22.23.2","schemaVersion":1},"license":"MIT-0","packages":["pkg:npm/check-error@2.1.3"],"schemaVersion":1,"subject":"pkg:npm/check-error@2.1.3","symbols":["check-error.compatibleConstructor"],"verifierAdapter":"node-typescript@1"}

{
  "name": "sample-check-error",
  "version": "1.0.0",
  "lockfileVersion": 3,
  "requires": true,
  "packages": {
    "": {
      "name": "sample-check-error",
      "version": "1.0.0",
      "license": "MIT-0",
      "dependencies": {
        "check-error": "2.1.3"
      }
    },
    "node_modules/check-error": {
      "version": "2.1.3",
      "resolved": "https://registry.npmjs.org/check-error/-/check-error-2.1.3.tgz",
      "integrity": "sha512-PAJdDJusoxnwm1VwW07VWwUN1sl7smmC3OKggvndJFadxxDRyFJBX/ggnu/KE4kQAB7a3Dp8f/YXC1FlUprWmA==",
      "license": "MIT",
      "engines": {
        "node": ">= 16"
      }
    }
  }
}

{
  "name": "sample-check-error",
  "version": "1.0.0",
  "type": "module",
  "license": "MIT-0",
  "dependencies": {
    "check-error": "2.1.3"
  }
}

{
  "schemaVersion": 1,
  "goal": "verify check-error.compatibleConstructor in pkg:npm/check-error@2.1.3",
  "kind": "HOW",
  "packages": [
    "pkg:npm/check-error@2.1.3"
  ],
  "symbols": [
    "check-error.compatibleConstructor"
  ]
}

import assert from 'node:assert/strict';
import { compatibleConstructor } from 'check-error';

// 1. compatibleConstructor matches error instances against matching constructor functions
const standardErr = new Error('standard error');
const typeErr = new TypeError('type error');
const rangeErr = new RangeError('range error');

assert.equal(compatibleConstructor(standardErr, Error), true);
assert.equal(compatibleConstructor(typeErr, TypeError), true);
assert.equal(compatibleConstructor(rangeErr, RangeError), true);

// 2. compatibleConstructor matches error instances against inherited superclass constructor functions
class CustomAppError extends Error {}
class SpecificServiceError extends CustomAppError {}

const customErr = new CustomAppError('custom error');
const specificErr = new SpecificServiceError('specific error');

assert.equal(compatibleConstructor(typeErr, Error), true);
assert.equal(compatibleConstructor(rangeErr, Error), true);
assert.equal(compatibleConstructor(customErr, Error), true);
assert.equal(compatibleConstructor(customErr, CustomAppError), true);
assert.equal(compatibleConstructor(specificErr, CustomAppError), true);
assert.equal(compatibleConstructor(specificErr, Error), true);

// 3. compatibleConstructor matches error instances against another error instance with compatible constructors
const anotherStandardErr = new Error('another standard error');
const anotherTypeErr = new TypeError('another type error');

assert.equal(compatibleConstructor(standardErr, anotherStandardErr), true);
assert.equal(compatibleConstructor(typeErr, anotherTypeErr), true);
assert.equal(compatibleConstructor(customErr, standardErr), true);
assert.equal(compatibleConstructor(specificErr, customErr), true);

// 4. compatibleConstructor returns false when constructors do not match or inherit
assert.equal(compatibleConstructor(standardErr, TypeError), false);
assert.equal(compatibleConstructor(standardErr, RangeError), false);
assert.equal(compatibleConstructor(standardErr, CustomAppError), false);
assert.equal(compatibleConstructor(standardErr, typeErr), false);
assert.equal(compatibleConstructor(standardErr, customErr), false);
assert.equal(compatibleConstructor(typeErr, RangeError), false);
assert.equal(compatibleConstructor(customErr, SpecificServiceError), false);
assert.equal(compatibleConstructor(customErr, specificErr), false);

// 5. compatibleConstructor returns false for non-constructor values and throws TypeError for null target
assert.equal(compatibleConstructor(standardErr, undefined), false);
assert.equal(compatibleConstructor(standardErr, {}), false);
assert.equal(compatibleConstructor(standardErr, 'Error'), false);
assert.equal(compatibleConstructor(standardErr, 123), false);
assert.equal(compatibleConstructor(standardErr, () => {}), false);
assert.throws(() => compatibleConstructor(standardErr, null), TypeError);

console.log('All check-error.compatibleConstructor contract assertions passed.');