check-error 2.1.3: compatibleMessage

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.compatibleMessage 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.compatibleMessage

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:be66dcdb449271bc6cec7f55a64d65956f60bb8d9cf5f19da14dfaee0402df2b","contract":["compatibleMessage matches an Error instance message against a string substring","compatibleMessage matches an Error instance message against a RegExp pattern","compatibleMessage matches a plain string error message against substring and RegExp matchers","compatibleMessage returns false when the error message does not match the substring or RegExp pattern","compatibleMessage returns false when target message is undefined or when matcher is not a string or RegExp","compatibleMessage throws TypeError when thrown error object is null or undefined"],"goal":"verify check-error.compatibleMessage in pkg:npm/check-error@2.1.3","kind":"HOW","packages":["pkg:npm/check-error@2.1.3"],"schemaVersion":1,"symbols":["check-error.compatibleMessage"]},"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.compatibleMessage"],"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.compatibleMessage in pkg:npm/check-error@2.1.3",
  "kind": "HOW",
  "packages": [
    "pkg:npm/check-error@2.1.3"
  ],
  "symbols": [
    "check-error.compatibleMessage"
  ]
}

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

// 1. compatibleMessage matches an Error instance message against a string substring
const err = new Error('Database connection failed: timeout after 5000ms');
assert.equal(compatibleMessage(err, 'Database connection'), true);
assert.equal(compatibleMessage(err, 'timeout after 5000ms'), true);
assert.equal(compatibleMessage(err, 'failed'), true);

// 2. compatibleMessage matches an Error instance message against a RegExp pattern
assert.equal(compatibleMessage(err, /^Database connection/), true);
assert.equal(compatibleMessage(err, /timeout after \d+ms/), true);
assert.equal(compatibleMessage(err, /TIMEOUT/i), true);

// 3. compatibleMessage matches a plain string error message against substring and RegExp matchers
const strErr = 'invalid configuration parameter';
assert.equal(compatibleMessage(strErr, 'configuration'), true);
assert.equal(compatibleMessage(strErr, /^invalid/), true);
assert.equal(compatibleMessage(strErr, /parameter$/), true);

// 4. compatibleMessage returns false when the error message does not match the substring or RegExp pattern
assert.equal(compatibleMessage(err, 'network unreachable'), false);
assert.equal(compatibleMessage(err, /^timeout/), false);
assert.equal(compatibleMessage(strErr, 'unrelated message'), false);
assert.equal(compatibleMessage(strErr, /^[0-9]+$/), false);

// 5. compatibleMessage returns false when target message is undefined or when matcher is not a string or RegExp
assert.equal(compatibleMessage({}, 'test'), false);
assert.equal(compatibleMessage({ otherProp: 'value' }, 'test'), false);
assert.equal(compatibleMessage(err, null), false);
assert.equal(compatibleMessage(err, undefined), false);
assert.equal(compatibleMessage(err, 12345), false);
assert.equal(compatibleMessage(err, {}), false);

// 6. compatibleMessage throws TypeError when thrown error object is null or undefined
assert.throws(() => compatibleMessage(null, 'test'), TypeError);
assert.throws(() => compatibleMessage(undefined, 'test'), TypeError);

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