kleur 4.1.5: blue

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 kleur.blue in pkg:npm/kleur@4.1.5
Kind: HOW

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

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:cade28eaa96133ed039f73d9604454fe6b7fa7ce9a18973a1bb8f66facaed455","contract":["kleur.blue(str) wraps string with ANSI escape codes \\x1b[34m and \\x1b[39m when enabled","kleur.blue(num) converts number input to string and applies blue foreground ANSI escape codes","kleur.blue() returns a chainable object allowing combination with other styling methods","kleur.blue(str) handles nested closing sequences by re-opening the blue foreground code","kleur.blue(str) returns unstyled string when kleur.enabled is false"],"goal":"verify kleur.blue in pkg:npm/kleur@4.1.5","kind":"HOW","packages":["pkg:npm/kleur@4.1.5"],"schemaVersion":1,"symbols":["kleur.blue"]},"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/kleur@4.1.5"],"schemaVersion":1,"subject":"pkg:npm/kleur@4.1.5","symbols":["kleur.blue"],"verifierAdapter":"node-typescript@1"}

{
  "name": "sample-kleur-blue",
  "version": "1.0.0",
  "lockfileVersion": 3,
  "requires": true,
  "packages": {
    "": {
      "name": "sample-kleur-blue",
      "version": "1.0.0",
      "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-blue",
  "version": "1.0.0",
  "private": true,
  "type": "module",
  "dependencies": {
    "kleur": "4.1.5"
  }
}

{
  "schemaVersion": 1,
  "goal": "verify kleur.blue in pkg:npm/kleur@4.1.5",
  "kind": "HOW",
  "packages": [
    "pkg:npm/kleur@4.1.5"
  ],
  "symbols": [
    "kleur.blue"
  ]
}

import assert from 'node:assert/strict';
import kleur from 'kleur';

// Ensure kleur styling is enabled for testing ANSI output
kleur.enabled = true;

// 1. kleur.blue(str) wraps string with ANSI escape codes \x1b[34m and \x1b[39m when enabled
const styledText = kleur.blue('hello world');
assert.strictEqual(styledText, '\x1b[34mhello world\x1b[39m');

// 2. kleur.blue(num) converts number input to string and applies blue foreground ANSI escape codes
const styledNumber = kleur.blue(42);
assert.strictEqual(styledNumber, '\x1b[34m42\x1b[39m');

// 3. kleur.blue() returns a chainable object allowing combination with other styling methods
const chainedStyle = kleur.blue().bold('alert');
assert.strictEqual(chainedStyle, '\x1b[34m\x1b[1malert\x1b[39m\x1b[22m');

// 4. kleur.blue(str) handles nested closing sequences by re-opening the blue foreground code
const nested = kleur.blue('open\x1b[39mclose');
assert.strictEqual(nested, '\x1b[34mopen\x1b[39m\x1b[34mclose\x1b[39m');

// 5. kleur.blue(str) returns unstyled string when kleur.enabled is false
kleur.enabled = false;
const unstyledText = kleur.blue('plain text');
assert.strictEqual(unstyledText, 'plain text');

const unstyledNumber = kleur.blue(100);
assert.strictEqual(unstyledNumber, '100');

// Restore enabled flag
kleur.enabled = true;