promzard 2.0.0: PromZard

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 promzard.PromZard in pkg:npm/promzard@2.0.0
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/promzard@2.0.0
Demonstrate these symbols/APIs:
  - promzard.PromZard

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:sha256:67dda311d373da754291ad612414e6d7828cd1bdefe5b3bbbbb0bf149c983c4d","contract":["new PromZard(file, ctx, options) constructs an instance and .load() evaluates the file module with ctx variables, nested objects, async functions, and callback functions","new PromZard(missingFile, ctx, { backupFile }) falls back to backupFile when the primary file cannot be read","PromZard.fromBuffer(buf, ctx, options) evaluates a buffer directly without reading from disk"],"goal":"verify promzard.PromZard in pkg:npm/promzard@2.0.0","kind":"HOW","packages":["pkg:npm/promzard@2.0.0"],"schemaVersion":1,"symbols":["promzard.PromZard"]},"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/promzard@2.0.0"],"schemaVersion":1,"subject":"pkg:npm/promzard@2.0.0","symbols":["promzard.PromZard"],"verifierAdapter":"node-typescript@1"}

module.exports = {
  appName: appName,
  nested: {
    version: version
  },
  computed: async function () {
    return appName + '@' + version
  },
  callbackFn: function (cb) {
    cb(null, 'ok:' + this.__basename)
  }
}

{
  "name": "sample",
  "version": "1.0.0",
  "lockfileVersion": 3,
  "requires": true,
  "packages": {
    "": {
      "name": "sample",
      "version": "1.0.0",
      "dependencies": {
        "promzard": "2.0.0"
      }
    },
    "node_modules/mute-stream": {
      "version": "2.0.0",
      "resolved": "https://registry.npmjs.org/mute-stream/-/mute-stream-2.0.0.tgz",
      "integrity": "sha512-WWdIxpyjEn+FhQJQQv9aQAYlHoNVdzIzUySNV1gHUPDSdZJ3yZn7pAAbQcV7B56Mvu881q9FZV+0Vx2xC44VWA==",
      "license": "ISC",
      "engines": {
        "node": "^18.17.0 || >=20.5.0"
      }
    },
    "node_modules/promzard": {
      "version": "2.0.0",
      "resolved": "https://registry.npmjs.org/promzard/-/promzard-2.0.0.tgz",
      "integrity": "sha512-Ncd0vyS2eXGOjchIRg6PVCYKetJYrW1BSbbIo+bKdig61TB6nH2RQNF2uP+qMpsI73L/jURLWojcw8JNIKZ3gg==",
      "license": "ISC",
      "dependencies": {
        "read": "^4.0.0"
      },
      "engines": {
        "node": "^18.17.0 || >=20.5.0"
      }
    },
    "node_modules/read": {
      "version": "4.1.0",
      "resolved": "https://registry.npmjs.org/read/-/read-4.1.0.tgz",
      "integrity": "sha512-uRfX6K+f+R8OOrYScaM3ixPY4erg69f8DN6pgTvMcA9iRc8iDhwrA4m3Yu8YYKsXJgVvum+m8PkRboZwwuLzYA==",
      "license": "ISC",
      "dependencies": {
        "mute-stream": "^2.0.0"
      },
      "engines": {
        "node": "^18.17.0 || >=20.5.0"
      }
    }
  }
}

{
  "name": "sample",
  "version": "1.0.0",
  "private": true,
  "dependencies": {
    "promzard": "2.0.0"
  }
}

{
  "schemaVersion": 1,
  "goal": "verify promzard.PromZard in pkg:npm/promzard@2.0.0",
  "kind": "HOW",
  "packages": [
    "pkg:npm/promzard@2.0.0"
  ],
  "symbols": [
    "promzard.PromZard"
  ]
}

import assert from 'node:assert/strict'
import path from 'node:path'
import { fileURLToPath } from 'node:url'
import promzard from 'promzard'
import { PromZard } from 'promzard'

const __dirname = path.dirname(fileURLToPath(import.meta.url))
const inputFile = path.join(__dirname, '..', 'input.js')
const missingFile = path.join(__dirname, '..', 'nonexistent.js')

assert.equal(typeof PromZard, 'function')
assert.equal(promzard.PromZard, PromZard)
assert.equal(promzard, PromZard.promzard)

// 1. Direct instantiation and .load() with context
const ctx1 = { appName: 'demo-widget', version: '1.2.3' }
const pz = new PromZard(inputFile, ctx1)
const res1 = await pz.load()
assert.deepEqual(res1, {
  appName: 'demo-widget',
  nested: { version: '1.2.3' },
  computed: 'demo-widget@1.2.3',
  callbackFn: 'ok:input.js'
})

// 2. Backup file fallback when primary file is missing
const ctx2 = { appName: 'fallback-app', version: '2.0.0' }
const pzBackup = new PromZard(missingFile, ctx2, { backupFile: inputFile })
const res2 = await pzBackup.load()
assert.equal(res2.appName, 'fallback-app')
assert.equal(res2.computed, 'fallback-app@2.0.0')

// 3. Static PromZard.fromBuffer evaluation
const buf = Buffer.from('module.exports = { tag: prefix + "-v1" }')
const res3 = await PromZard.fromBuffer(buf, { prefix: 'release' })
assert.deepEqual(res3, { tag: 'release-v1' })