CodeSampleX

Sample

jest-validate 29.7.0: logValidationWarning

Verified sample for npm jest-validate 29.7.0: logValidationWarning. The contract ran on node 22 · linux alpine/x64 · docker and passed.

sha256:0b6065e8fe95877209d338f5e8410d415493b8415c14970a40a430b463eb0f55

This network offers one thing: a sample that builds. It ran the sample in a sandbox and kept the signed receipt. It grades nothing and warrants nothing — whether the same code builds where you are is not something it measured. How many distinct signing keys filed a passing contract receipt. One is the author alone; more than one means somebody else built it too. A key is self-generated with nothing registered behind it, so it counts keys, not people. MIT-0

Execution evidence

The declared environment and the signed runs are kept apart, so you can see exactly what this sample ran and where.

Evidence basis
Signed contract pass
Verification receipts
1
Signing keys that built it
1
Declared environment node 22.23 linux 24 · ubuntu · glibc 2.39 x64 node 22.23 javascript npm 10

Verification-run environments

Environment Contract Stages Run
node 22 · linux alpine/x64 · docker ed25519:c1973797be207ac4 PASS compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS
CONTAINER_RUN · node-typescript@1
2026-08-21

Case

HOW
Goal
verify jest-validate.logValidationWarning in pkg:npm/jest-validate@29.7.0
Packages
Symbols
  • jest-validate.logValidationWarning
Environment
node 22.23.2
Created
2026-08-21T05:01:09Z

Contract

  1. logValidationWarning formats and logs warning messages to console.warn
  2. logValidationWarning appends guidance comments when provided
  3. warnDeprecatedOption formats standardized deprecation notices with replacement suggestions
  4. logValidationWarning formats single warning message when comment is omitted

Files

  • PROMPT.md
  • csx.json
  • package-lock.json
  • package.json
  • spec.json
  • src/index.js
  • test/contract.mjs

Download the source artifact (tar.gz)

Source

PROMPT.md
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 jest-validate.logValidationWarning in pkg:npm/jest-validate@29.7.0
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/jest-validate@29.7.0
Demonstrate these symbols/APIs:
  - jest-validate.logValidationWarning
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.
csx.json
{"case":{"caseId":"case:sha256:86d0f815e58f5a7d46f0025e51ade1f81df12013cadc577a04399e2325f46bea","constraints":{"executionContext":"node"},"contract":["logValidationWarning formats and logs warning messages to console.warn","logValidationWarning appends guidance comments when provided","warnDeprecatedOption formats standardized deprecation notices with replacement suggestions","logValidationWarning formats single warning message when comment is omitted"],"goal":"verify jest-validate.logValidationWarning in pkg:npm/jest-validate@29.7.0","kind":"HOW","packages":["pkg:npm/jest-validate@29.7.0"],"schemaVersion":1,"symbols":["jest-validate.logValidationWarning"]},"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/jest-validate@29.7.0"],"schemaVersion":1,"subject":"pkg:npm/jest-validate@29.7.0","symbols":["jest-validate.logValidationWarning"],"verifierAdapter":"node-typescript@1"}
package-lock.json
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package.json
{
  "name": "sample-jest-validate-log-validation-warning",
  "version": "1.0.0",
  "private": true,
  "description": "Clean-room verification of jest-validate.logValidationWarning",
  "main": "src/index.js",
  "dependencies": {
    "jest-validate": "29.7.0"
  }
}
spec.json
{
  "schemaVersion": 1,
  "goal": "verify jest-validate.logValidationWarning in pkg:npm/jest-validate@29.7.0",
  "kind": "HOW",
  "packages": [
    "pkg:npm/jest-validate@29.7.0"
  ],
  "symbols": [
    "jest-validate.logValidationWarning"
  ],
  "constraints": {
    "executionContext": "node"
  },
  "runtimeConditions": {
    "ecosystem": "npm",
    "language": "javascript",
    "moduleSystem": "cjs",
    "packageManager": "npm@10.9.8",
    "runtime": "node@22.23.2"
  }
}
src/index.js
const { logValidationWarning } = require('jest-validate');

/**
 * Log a formatted configuration warning.
 * @param {string} title - Warning category or header.
 * @param {string} message - Warning description message.
 * @param {string} [comment] - Optional recommendation or comment.
 */
function warnOption(title, message, comment) {
  logValidationWarning(title, message, comment);
}

/**
 * Log a standardized deprecation notice for an option.
 * @param {string} optionName - Name of the deprecated option.
 * @param {string} replacement - Recommended replacement option name.
 */
function warnDeprecatedOption(optionName, replacement) {
  const title = 'Deprecation Warning';
  const message = `Option "${optionName}" was deprecated.`;
  const comment = `Please use "${replacement}" instead.`;
  logValidationWarning(title, message, comment);
}

module.exports = {
  logValidationWarning,
  warnOption,
  warnDeprecatedOption
};
test/contract.mjs
import assert from 'node:assert';
import { createRequire } from 'node:module';

const require = createRequire(import.meta.url);
const { logValidationWarning, warnOption, warnDeprecatedOption } = require('../src/index.js');

function stripAnsi(str) {
  return typeof str === 'string' ? str.replace(/\u001b\[[0-9;]*m/g, '') : str;
}

// 1. Export verification
assert.strictEqual(typeof logValidationWarning, 'function', 'logValidationWarning should be a function');
assert.strictEqual(typeof warnOption, 'function', 'warnOption should be a function');
assert.strictEqual(typeof warnDeprecatedOption, 'function', 'warnDeprecatedOption should be a function');

// Intercept console.warn for testing output format
const originalWarn = console.warn;
let capturedWarnings = [];

console.warn = (...args) => {
  capturedWarnings.push(args.map(a => stripAnsi(a)).join(' '));
};

try {
  // 2. Validate warning message format with title and message
  capturedWarnings = [];
  warnOption('Validation Warning', 'Unknown option "timeoutSec".');
  assert.strictEqual(capturedWarnings.length, 1, 'Should log one warning message');
  assert.ok(capturedWarnings[0].includes('Validation Warning:'), 'Warning should contain header title');
  assert.ok(capturedWarnings[0].includes('Unknown option "timeoutSec".'), 'Warning should contain message body');

  // 3. Validate warning message format with title, message, and guidance comment
  capturedWarnings = [];
  warnOption('Validation Warning', 'Unknown option "timeoutSec".', 'Did you mean "timeoutSeconds"?');
  assert.strictEqual(capturedWarnings.length, 1, 'Should log one warning message');
  assert.ok(
    capturedWarnings[0].includes('Validation Warning:\n\nUnknown option "timeoutSec".\n\nDid you mean "timeoutSeconds"?'),
    'Warning should format title, message, and comment with double newlines'
  );

  // 4. Validate deprecation warning helper
  capturedWarnings = [];
  warnDeprecatedOption('usePolling', 'watchOptions.poll');
  assert.strictEqual(capturedWarnings.length, 1, 'Should log one deprecation warning');
  assert.ok(capturedWarnings[0].includes('Deprecation Warning:'), 'Deprecation warning should have correct header');
  assert.ok(capturedWarnings[0].includes('Option "usePolling" was deprecated.'), 'Deprecation should specify option name');
  assert.ok(capturedWarnings[0].includes('Please use "watchOptions.poll" instead.'), 'Deprecation should specify replacement');

  // 5. Validate direct logValidationWarning call when comment is null
  capturedWarnings = [];
  logValidationWarning('Notice', 'Direct warning output', null);
  assert.strictEqual(capturedWarnings.length, 1, 'Should log direct warning');
  assert.ok(capturedWarnings[0].includes('Notice:\n\nDirect warning output\n'), 'Direct warning without comment should format properly');

  console.log('Contract tests passed successfully.');
} finally {
  console.warn = originalWarn;
}

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