tinyrainbow 2.0.0

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/tinyrainbow@2.0.0
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/tinyrainbow@2.0.0

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:sha256:33c149464e21b9081f63f49a2397bb7858863f9602aaa049e3cd6b61b9dd81cd","contract":["createColors returns color formatting functions that wrap text in ANSI escape codes when colors are enabled","createColors returns no-op formatting functions that return plain text when colors are disabled","getDefaultColors returns unformatted plain text functions with isColorSupported false","nested color formatting restores the outer ANSI color code on close"],"goal":"verify pkg:npm/tinyrainbow@2.0.0","kind":"HOW","packages":["pkg:npm/tinyrainbow@2.0.0"],"schemaVersion":1},"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/tinyrainbow@2.0.0"],"schemaVersion":1,"subject":"pkg:npm/tinyrainbow@2.0.0","verifierAdapter":"node-typescript@1"}

{
  "name": "sample-tinyrainbow",
  "version": "1.0.0",
  "lockfileVersion": 3,
  "requires": true,
  "packages": {
    "": {
      "name": "sample-tinyrainbow",
      "version": "1.0.0",
      "license": "MIT-0",
      "dependencies": {
        "tinyrainbow": "2.0.0"
      }
    },
    "node_modules/tinyrainbow": {
      "version": "2.0.0",
      "resolved": "https://registry.npmjs.org/tinyrainbow/-/tinyrainbow-2.0.0.tgz",
      "integrity": "sha512-op4nsTR47R6p0vMUUoYl/a+ljLFVtlfaXkLQmqfLR1qHma1h/ysYk4hEXZ880bf2CYgTskvTa/e196Vd5dDQXw==",
      "license": "MIT",
      "engines": {
        "node": ">=14.0.0"
      }
    }
  }
}

{
  "name": "sample-tinyrainbow",
  "version": "1.0.0",
  "private": true,
  "type": "module",
  "description": "Clean-room verification sample for tinyrainbow",
  "main": "src/index.js",
  "scripts": {
    "test": "node test/contract.mjs"
  },
  "dependencies": {
    "tinyrainbow": "2.0.0"
  },
  "license": "MIT-0"
}

{
  "schemaVersion": 1,
  "goal": "verify pkg:npm/tinyrainbow@2.0.0",
  "kind": "HOW",
  "packages": [
    "pkg:npm/tinyrainbow@2.0.0"
  ]
}

import c, { createColors, getDefaultColors, isSupported } from 'tinyrainbow';

export function formatMessage(text, colorName, forced = true) {
  const colors = createColors(forced);
  if (typeof colors[colorName] === 'function') {
    return colors[colorName](text);
  }
  return text;
}

export { c as defaultColors, createColors, getDefaultColors, isSupported };

import assert from 'node:assert/strict';
import { createColors, getDefaultColors, isSupported } from 'tinyrainbow';
import { formatMessage } from '../src/index.js';

// 1. Basic properties and exports
assert.strictEqual(typeof createColors, 'function', 'createColors should be a function');
assert.strictEqual(typeof getDefaultColors, 'function', 'getDefaultColors should be a function');
assert.strictEqual(typeof isSupported, 'function', 'isSupported should be a function');

// 2. Default uncolored instance from getDefaultColors()
const defaultInstance = getDefaultColors();
assert.strictEqual(defaultInstance.isColorSupported, false, 'defaultInstance should have isColorSupported false');
assert.strictEqual(defaultInstance.red('test'), 'test', 'getDefaultColors red should return plain text');
assert.strictEqual(defaultInstance.bold('test'), 'test', 'getDefaultColors bold should return plain text');
assert.strictEqual(defaultInstance.red.open, '', 'getDefaultColors red.open should be empty');
assert.strictEqual(defaultInstance.red.close, '', 'getDefaultColors red.close should be empty');

// 3. Forced colors enabled with createColors(true) and FORCE_COLOR=1
process.env.FORCE_COLOR = '1';
delete process.env.NO_COLOR;
const enabled = createColors(true);
assert.strictEqual(enabled.isColorSupported, true, 'createColors(true) with FORCE_COLOR=1 should have isColorSupported true');

// Modifiers
assert.strictEqual(enabled.bold('bold'), '\x1b[1mbold\x1b[22m', 'bold should wrap with correct ANSI codes');
assert.strictEqual(enabled.dim('dim'), '\x1b[2mdim\x1b[22m', 'dim should wrap with correct ANSI codes');
assert.strictEqual(enabled.italic('italic'), '\x1b[3mitalic\x1b[23m', 'italic should wrap with correct ANSI codes');
assert.strictEqual(enabled.underline('under'), '\x1b[4munder\x1b[24m', 'underline should wrap with correct ANSI codes');
assert.strictEqual(enabled.inverse('inv'), '\x1b[7minv\x1b[27m', 'inverse should wrap with correct ANSI codes');
assert.strictEqual(enabled.hidden('hid'), '\x1b[8mhid\x1b[28m', 'hidden should wrap with correct ANSI codes');
assert.strictEqual(enabled.strikethrough('strike'), '\x1b[9mstrike\x1b[29m', 'strikethrough should wrap with correct ANSI codes');

// Foreground colors
assert.strictEqual(enabled.black('text'), '\x1b[30mtext\x1b[39m', 'black should wrap with correct ANSI codes');
assert.strictEqual(enabled.red('text'), '\x1b[31mtext\x1b[39m', 'red should wrap with correct ANSI codes');
assert.strictEqual(enabled.green('text'), '\x1b[32mtext\x1b[39m', 'green should wrap with correct ANSI codes');
assert.strictEqual(enabled.yellow('text'), '\x1b[33mtext\x1b[39m', 'yellow should wrap with correct ANSI codes');
assert.strictEqual(enabled.blue('text'), '\x1b[34mtext\x1b[39m', 'blue should wrap with correct ANSI codes');
assert.strictEqual(enabled.magenta('text'), '\x1b[35mtext\x1b[39m', 'magenta should wrap with correct ANSI codes');
assert.strictEqual(enabled.cyan('text'), '\x1b[36mtext\x1b[39m', 'cyan should wrap with correct ANSI codes');
assert.strictEqual(enabled.white('text'), '\x1b[37mtext\x1b[39m', 'white should wrap with correct ANSI codes');
assert.strictEqual(enabled.gray('text'), '\x1b[90mtext\x1b[39m', 'gray should wrap with correct ANSI codes');

// Background colors
assert.strictEqual(enabled.bgBlack('text'), '\x1b[40mtext\x1b[49m', 'bgBlack should wrap with correct ANSI codes');
assert.strictEqual(enabled.bgRed('text'), '\x1b[41mtext\x1b[49m', 'bgRed should wrap with correct ANSI codes');
assert.strictEqual(enabled.bgGreen('text'), '\x1b[42mtext\x1b[49m', 'bgGreen should wrap with correct ANSI codes');
assert.strictEqual(enabled.bgYellow('text'), '\x1b[43mtext\x1b[49m', 'bgYellow should wrap with correct ANSI codes');
assert.strictEqual(enabled.bgBlue('text'), '\x1b[44mtext\x1b[49m', 'bgBlue should wrap with correct ANSI codes');
assert.strictEqual(enabled.bgMagenta('text'), '\x1b[45mtext\x1b[49m', 'bgMagenta should wrap with correct ANSI codes');
assert.strictEqual(enabled.bgCyan('text'), '\x1b[46mtext\x1b[49m', 'bgCyan should wrap with correct ANSI codes');
assert.strictEqual(enabled.bgWhite('text'), '\x1b[47mtext\x1b[49m', 'bgWhite should wrap with correct ANSI codes');

// Open / close properties
assert.strictEqual(enabled.red.open, '\x1b[31m', 'red.open should be opening escape sequence');
assert.strictEqual(enabled.red.close, '\x1b[39m', 'red.close should be closing escape sequence');
assert.strictEqual(enabled.bold.open, '\x1b[1m', 'bold.open should be opening escape sequence');
assert.strictEqual(enabled.bold.close, '\x1b[22m', 'bold.close should be closing escape sequence');

// Nested formatting
const nested = enabled.red('hello ' + enabled.green('world') + ' again');
assert.strictEqual(nested, '\x1b[31mhello \x1b[32mworld\x1b[31m again\x1b[39m', 'nested colors should restore outer color on close');

// Wrapper function test
assert.strictEqual(formatMessage('status', 'green', true), '\x1b[32mstatus\x1b[39m', 'formatMessage helper should format text');

// 4. Forced colors disabled with NO_COLOR=1
process.env.NO_COLOR = '1';
delete process.env.FORCE_COLOR;
const disabled = createColors(false);
assert.strictEqual(disabled.isColorSupported, false, 'createColors(false) with NO_COLOR=1 should have isColorSupported false');
assert.strictEqual(disabled.red('plain'), 'plain', 'disabled red should return plain text');
assert.strictEqual(disabled.bold('plain'), 'plain', 'disabled bold should return plain text');
assert.strictEqual(disabled.bgBlue('plain'), 'plain', 'disabled bgBlue should return plain text');

console.log('Contract tests passed successfully.');