lunar-javascript 1.7.7: Solar, Lunar

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/lunar-javascript@1.7.7
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/lunar-javascript@1.7.7

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:sha256:9973313bdf55c156a1ded1a41354b2c40f9e21527784b641abe2def52413e35c","contract":["assert Solar fromYmd creates a valid Solar date with correct calendar fields","assert Lunar fromYmd creates a valid Lunar date with lunar calendar fields","assert Solar getLunar converts Gregorian solar date to matching lunar date","assert Lunar getSolar converts Chinese lunar date to matching Gregorian solar date","assert Solar next advances date by specified number of days"],"goal":"verify pkg:npm/lunar-javascript@1.7.7","kind":"HOW","packages":["pkg:npm/lunar-javascript@1.7.7"],"schemaVersion":1,"symbols":["Solar","Lunar"]},"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/lunar-javascript@1.7.7"],"schemaVersion":1,"subject":"pkg:npm/lunar-javascript@1.7.7","symbols":["Solar","Lunar"],"verifierAdapter":"node-typescript@1"}

import { Solar, Lunar } from 'lunar-javascript';

/**
 * Creates a Solar date instance.
 *
 * @param {number} year
 * @param {number} month
 * @param {number} day
 * @returns {Solar}
 */
export function createSolar(year, month, day) {
  return Solar.fromYmd(year, month, day);
}

/**
 * Creates a Lunar date instance.
 *
 * @param {number} year
 * @param {number} month
 * @param {number} day
 * @returns {Lunar}
 */
export function createLunar(year, month, day) {
  return Lunar.fromYmd(year, month, day);
}

/**
 * Converts a Solar date to its Lunar counterpart.
 *
 * @param {Solar} solar
 * @returns {Lunar}
 */
export function solarToLunar(solar) {
  return solar.getLunar();
}

/**
 * Converts a Lunar date to its Solar counterpart.
 *
 * @param {Lunar} lunar
 * @returns {Solar}
 */
export function lunarToSolar(lunar) {
  return lunar.getSolar();
}

export { Solar, Lunar };
export default {
  Solar,
  Lunar,
  createSolar,
  createLunar,
  solarToLunar,
  lunarToSolar,
};

{
  "name": "sample-lunar-javascript-verify",
  "version": "1.0.0",
  "lockfileVersion": 3,
  "requires": true,
  "packages": {
    "": {
      "name": "sample-lunar-javascript-verify",
      "version": "1.0.0",
      "dependencies": {
        "lunar-javascript": "1.7.7"
      }
    },
    "node_modules/lunar-javascript": {
      "version": "1.7.7",
      "resolved": "https://registry.npmjs.org/lunar-javascript/-/lunar-javascript-1.7.7.tgz",
      "integrity": "sha512-u/KYiwPIBo/0bT+WWfU7qO1d+aqeB90Tuy4ErXenr2Gam0QcWeezUvtiOIyXR7HbVnW2I1DKfU0NBvzMZhbVQw==",
      "license": "MIT"
    }
  }
}

{
  "name": "sample-lunar-javascript-verify",
  "version": "1.0.0",
  "private": true,
  "type": "module",
  "dependencies": {
    "lunar-javascript": "1.7.7"
  }
}

{
  "schemaVersion": 1,
  "goal": "verify pkg:npm/lunar-javascript@1.7.7",
  "kind": "HOW",
  "packages": [
    "pkg:npm/lunar-javascript@1.7.7"
  ]
}

import assert from 'node:assert/strict';
import {
  Solar,
  Lunar,
  createSolar,
  createLunar,
  solarToLunar,
  lunarToSolar,
} from '../index.mjs';

// 1. assert Solar fromYmd creates a valid Solar date with correct calendar fields
{
  const solar = createSolar(2024, 2, 10);
  assert.strictEqual(typeof solar, 'object');
  assert.strictEqual(typeof solar.toYmd, 'function');
  assert.strictEqual(solar.getYear(), 2024);
  assert.strictEqual(solar.getMonth(), 2);
  assert.strictEqual(solar.getDay(), 10);
  assert.strictEqual(solar.toYmd(), '2024-02-10');
  assert.strictEqual(solar.isLeapYear(), true);
}

// 2. assert Lunar fromYmd creates a valid Lunar date with lunar calendar fields
{
  const lunar = createLunar(2024, 1, 1);
  assert.strictEqual(typeof lunar, 'object');
  assert.strictEqual(typeof lunar.getYearInGanZhi, 'function');
  assert.strictEqual(lunar.getYear(), 2024);
  assert.strictEqual(lunar.getMonth(), 1);
  assert.strictEqual(lunar.getDay(), 1);
  assert.strictEqual(lunar.getYearInGanZhi(), '甲辰');
  assert.strictEqual(lunar.getYearShengXiao(), '龙');
  assert.strictEqual(lunar.getDayInChinese(), '初一');
}

// 3. assert Solar getLunar converts Gregorian solar date to matching lunar date
{
  const solar = createSolar(2024, 2, 10);
  const lunar = solarToLunar(solar);
  assert.strictEqual(typeof lunar, 'object');
  assert.strictEqual(lunar.getYear(), 2024);
  assert.strictEqual(lunar.getMonth(), 1);
  assert.strictEqual(lunar.getDay(), 1);
  assert.strictEqual(lunar.getYearInGanZhi(), '甲辰');
}

// 4. assert Lunar getSolar converts Chinese lunar date to matching Gregorian solar date
{
  const lunar = createLunar(2024, 1, 1);
  const solar = lunarToSolar(lunar);
  assert.strictEqual(typeof solar, 'object');
  assert.strictEqual(solar.getYear(), 2024);
  assert.strictEqual(solar.getMonth(), 2);
  assert.strictEqual(solar.getDay(), 10);
  assert.strictEqual(solar.toYmd(), '2024-02-10');
}

// 5. assert Solar next advances date by specified number of days
{
  const solar = createSolar(2024, 2, 10);
  const nextDay = solar.next(1);
  assert.strictEqual(nextDay.toYmd(), '2024-02-11');
  const prevDay = solar.next(-1);
  assert.strictEqual(prevDay.toYmd(), '2024-02-09');
}

console.log('All lunar-javascript contract assertions passed.');