kleur 4.1.5: red, bold, bgBlue

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/kleur@4.1.5
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/kleur@4.1.5
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.

{"case":{"caseId":"case:sha256:88c78674047d10bd3f0ce3f35523319f83fb71a23305f912c9717ee4cdab822a","constraints":{"executionContext":"node"},"contract":["kleur formats text with basic ANSI colors such as red, green, and blue when enabled is true","kleur applies style modifiers such as bold, dim, and underline to strings","kleur applies background colors such as bgBlue, bgRed, and bgGreen to strings","kleur supports chaining multiple color and style modifiers together","kleur returns plain unformatted text when enabled is false","kleur properly restores inner formatting when nesting same-style strings"],"goal":"verify pkg:npm/kleur@4.1.5","kind":"HOW","packages":["pkg:npm/kleur@4.1.5"],"schemaVersion":1,"symbols":["kleur.red","kleur.bold","kleur.bgBlue","kleur.enabled"]},"contractCommand":["node","test/contract.cjs"],"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/kleur@4.1.5"],"schemaVersion":1,"subject":"pkg:npm/kleur@4.1.5","symbols":["kleur.red","kleur.bold","kleur.bgBlue","kleur.enabled"],"verifierAdapter":"node-typescript@1"}

'use strict';

const kleur = require('kleur');

/**
 * Format text with red color.
 * @param {string} text
 * @returns {string}
 */
function red(text) {
  return kleur.red(text);
}

/**
 * Format text with bold modifier.
 * @param {string} text
 * @returns {string}
 */
function bold(text) {
  return kleur.bold(text);
}

/**
 * Format text with bgBlue modifier.
 * @param {string} text
 * @returns {string}
 */
function bgBlue(text) {
  return kleur.bgBlue(text);
}

/**
 * Format text with chained bold, red, and bgBlue styling.
 * @param {string} text
 * @returns {string}
 */
function boldRedOnBlue(text) {
  return kleur.bold().red().bgBlue(text);
}

/**
 * Enable or disable color formatting.
 * @param {boolean} flag
 */
function setColorEnabled(flag) {
  kleur.enabled = flag;
}

module.exports = {
  kleur,
  red,
  bold,
  bgBlue,
  boldRedOnBlue,
  setColorEnabled
};

{
  "name": "sample-kleur",
  "version": "1.0.0",
  "lockfileVersion": 3,
  "requires": true,
  "packages": {
    "": {
      "name": "sample-kleur",
      "version": "1.0.0",
      "license": "MIT-0",
      "dependencies": {
        "kleur": "4.1.5"
      }
    },
    "node_modules/kleur": {
      "version": "4.1.5",
      "resolved": "https://registry.npmjs.org/kleur/-/kleur-4.1.5.tgz",
      "integrity": "sha512-o+NO+8WrRiQEE4/7nwRJhN1HWpVmJm511pBHUxPLtp0BUISzlBplORYSmTclCnJvQq2tKu/sgl3xVpkc7ZWuQQ==",
      "license": "MIT",
      "engines": {
        "node": ">=6"
      }
    }
  }
}

{
  "name": "sample-kleur",
  "version": "1.0.0",
  "private": true,
  "description": "verify pkg:npm/kleur@4.1.5",
  "main": "index.js",
  "scripts": {
    "test": "node test/contract.cjs"
  },
  "dependencies": {
    "kleur": "4.1.5"
  },
  "license": "MIT-0"
}

{
  "schemaVersion": 1,
  "goal": "verify pkg:npm/kleur@4.1.5",
  "kind": "HOW",
  "packages": [
    "pkg:npm/kleur@4.1.5"
  ],
  "constraints": {
    "executionContext": "node"
  },
  "runtimeConditions": {
    "ecosystem": "npm",
    "language": "javascript",
    "moduleSystem": "cjs",
    "packageManager": "npm@10.9.8",
    "runtime": "node@22.23.2"
  }
}

'use strict';

const assert = require('node:assert');
const kleur = require('kleur');
const { red, bold, bgBlue, boldRedOnBlue, setColorEnabled } = require('../index.js');

function testContract() {
  const initialEnabled = kleur.enabled;

  try {
    // Ensure enabled for ANSI code tests
    kleur.enabled = true;

    // 1. kleur formats text with basic ANSI colors such as red, green, and blue when enabled is true
    assert.strictEqual(kleur.red('sample'), '\x1b[31msample\x1b[39m');
    assert.strictEqual(red('sample'), '\x1b[31msample\x1b[39m');
    assert.strictEqual(kleur.green('sample'), '\x1b[32msample\x1b[39m');
    assert.strictEqual(kleur.blue('sample'), '\x1b[34msample\x1b[39m');

    // 2. kleur applies style modifiers such as bold, dim, and underline to strings
    assert.strictEqual(kleur.bold('sample'), '\x1b[1msample\x1b[22m');
    assert.strictEqual(bold('sample'), '\x1b[1msample\x1b[22m');
    assert.strictEqual(kleur.dim('sample'), '\x1b[2msample\x1b[22m');
    assert.strictEqual(kleur.underline('sample'), '\x1b[4msample\x1b[24m');

    // 3. kleur applies background colors such as bgBlue, bgRed, and bgGreen to strings
    assert.strictEqual(kleur.bgBlue('sample'), '\x1b[44msample\x1b[49m');
    assert.strictEqual(bgBlue('sample'), '\x1b[44msample\x1b[49m');
    assert.strictEqual(kleur.bgRed('sample'), '\x1b[41msample\x1b[49m');
    assert.strictEqual(kleur.bgGreen('sample'), '\x1b[42msample\x1b[49m');

    // 4. kleur supports chaining multiple color and style modifiers together
    assert.strictEqual(kleur.bold().red('sample'), '\x1b[1m\x1b[31msample\x1b[22m\x1b[39m');
    assert.strictEqual(kleur.red().bold('sample'), '\x1b[31m\x1b[1msample\x1b[39m\x1b[22m');
    assert.strictEqual(boldRedOnBlue('sample'), '\x1b[1m\x1b[31m\x1b[44msample\x1b[22m\x1b[39m\x1b[49m');

    // 5. kleur returns plain unformatted text when enabled is false
    setColorEnabled(false);
    assert.strictEqual(kleur.enabled, false);
    assert.strictEqual(kleur.red('sample'), 'sample');
    assert.strictEqual(kleur.bold('sample'), 'sample');
    assert.strictEqual(kleur.bgBlue('sample'), 'sample');
    assert.strictEqual(boldRedOnBlue('sample'), 'sample');

    // 6. kleur properly restores inner formatting when nesting same-style strings
    setColorEnabled(true);
    const innerBold = kleur.bold('inner');
    const nestedBold = kleur.bold(`outer ${innerBold} outer`);
    assert.strictEqual(nestedBold, '\x1b[1mouter \x1b[1minner\x1b[22m\x1b[1m outer\x1b[22m');

    console.log('Contract tests passed successfully.');
    process.exit(0);
  } finally {
    kleur.enabled = initialEnabled;
  }
}

testContract();