@npmcli/query 4.0.1

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/%40npmcli/query@4.0.1
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/%40npmcli/query@4.0.1

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:feb312238a10285a5b8ba0e2c479d5e50be2dcdd21f3016281f60fab13fd4048","contract":["parser('') returns [] for falsy or empty query strings","parser transforms :attr, :semver, :path, :type, :outdated, :vuln, and nested :not into annotated AST nodes","nested :attr selectors insert arrayDelimiter into lookupProperties","parser(':attr(foo, bar)') throws an error with code EQUERYATTR when the final argument is not an attribute matcher"],"goal":"verify pkg:npm/%40npmcli/query@4.0.1","kind":"HOW","packages":["pkg:npm/%40npmcli/query@4.0.1"],"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/%40npmcli/query@4.0.1"],"schemaVersion":1,"subject":"pkg:npm/%40npmcli/query@4.0.1","verifierAdapter":"node-typescript@1"}

{
  "name": "verify-npmcli-query",
  "version": "1.0.0",
  "lockfileVersion": 3,
  "requires": true,
  "packages": {
    "": {
      "name": "verify-npmcli-query",
      "version": "1.0.0",
      "dependencies": {
        "@npmcli/query": "4.0.1"
      }
    },
    "node_modules/@npmcli/query": {
      "version": "4.0.1",
      "resolved": "https://registry.npmjs.org/@npmcli/query/-/query-4.0.1.tgz",
      "integrity": "sha512-4OIPFb4weUUwkDXJf4Hh1inAn8neBGq3xsH4ZsAaN6FK3ldrFkH7jSpCc7N9xesi0Sp+EBXJ9eGMDrEww2Ztqw==",
      "license": "ISC",
      "dependencies": {
        "postcss-selector-parser": "^7.0.0"
      },
      "engines": {
        "node": "^18.17.0 || >=20.5.0"
      }
    },
    "node_modules/cssesc": {
      "version": "3.0.0",
      "resolved": "https://registry.npmjs.org/cssesc/-/cssesc-3.0.0.tgz",
      "integrity": "sha512-/Tb/JcjK111nNScGob5MNtsntNM1aCNUDipB/TkwZFhyDrrE47SOx/18wF2bbjgc3ZzCSKW1T5nt5EbFoAz/Vg==",
      "license": "MIT",
      "bin": {
        "cssesc": "bin/cssesc"
      },
      "engines": {
        "node": ">=4"
      }
    },
    "node_modules/postcss-selector-parser": {
      "version": "7.1.6",
      "resolved": "https://registry.npmjs.org/postcss-selector-parser/-/postcss-selector-parser-7.1.6.tgz",
      "integrity": "sha512-7qASPzhKF2l2KLboRZux8CCTRMdGiV08vWmyKzPz22qZ7ZjQBOeY7rNzNoCLSUiftJ7HUq0GERHmxw/t0dCdMw==",
      "license": "MIT",
      "dependencies": {
        "cssesc": "^3.0.0",
        "util-deprecate": "^1.0.2"
      },
      "engines": {
        "node": ">=4"
      }
    },
    "node_modules/util-deprecate": {
      "version": "1.0.2",
      "resolved": "https://registry.npmjs.org/util-deprecate/-/util-deprecate-1.0.2.tgz",
      "integrity": "sha512-EPD5q1uXyFxJpCrLnCc1nHnq3gOa6DZBocAIiI2TaSCA7VCJ1UJDMagCzIkXNsUYfD1daK//LTEQ8xiIbrHtcw==",
      "license": "MIT"
    }
  }
}

{
  "name": "verify-npmcli-query",
  "version": "1.0.0",
  "private": true,
  "type": "module",
  "dependencies": {
    "@npmcli/query": "4.0.1"
  },
  "scripts": {
    "test": "node test/contract.mjs"
  }
}

{
  "schemaVersion": 1,
  "goal": "verify pkg:npm/%40npmcli/query@4.0.1",
  "kind": "HOW",
  "packages": [
    "pkg:npm/%40npmcli/query@4.0.1"
  ]
}

import assert from 'node:assert/strict'
import queryPkg from '@npmcli/query'

const { parser, arrayDelimiter } = queryPkg

// 1. Empty / falsy query returns empty array
assert.deepEqual(parser(''), [])
assert.deepEqual(parser(null), [])

// 2. Parse :attr, :semver, :path, :type, :outdated, :vuln, and nested :not
const ast = parser(
  '#pkg:attr(funding, [type="individual"]):semver(^1.0.0):path(packages/app):type(git):outdated(major):vuln([severity=high]):not(:dev)'
)

assert.equal(ast.type, 'root')
assert.equal(ast.nodes.length, 1)

const selectorNodes = ast.nodes[0].nodes

const idNode = selectorNodes.find(n => n.type === 'id')
assert.equal(idNode.value, 'pkg')

const attrNode = selectorNodes.find(n => n.value === ':attr')
assert.deepEqual(attrNode.lookupProperties, ['funding'])
assert.equal(attrNode.attributeMatcher.qualifiedAttribute, 'type')
assert.equal(attrNode.attributeMatcher.operator, '=')
assert.equal(attrNode.attributeMatcher.value, 'individual')

const semverNode = selectorNodes.find(n => n.value === ':semver')
assert.equal(semverNode.semverValue, '^1.0.0')
assert.equal(semverNode.attributeMatcher.attribute, 'version')

const pathNode = selectorNodes.find(n => n.value === ':path')
assert.equal(pathNode.pathValue, 'packages/app')

const typeNode = selectorNodes.find(n => n.value === ':type')
assert.equal(typeNode.typeValue, 'git')

const outdatedNode = selectorNodes.find(n => n.value === ':outdated')
assert.equal(outdatedNode.outdatedKind, 'major')

const vulnNode = selectorNodes.find(n => n.value === ':vuln')
assert.deepEqual(vulnNode.vulns, [{ severity: ['high'] }])

const notNode = selectorNodes.find(n => n.value === ':not')
assert.equal(notNode.nestedNode.type, 'root')
assert.equal(notNode.nestedNode.nodes[0].nodes[0].value, ':dev')

// 3. Nested :attr uses arrayDelimiter
const nestedAttrAst = parser(':attr(contributors, :attr([name=test]))')
const nestedAttrNode = nestedAttrAst.nodes[0].nodes[0]
assert.deepEqual(nestedAttrNode.lookupProperties, ['contributors', arrayDelimiter])
assert.equal(nestedAttrNode.attributeMatcher.attribute, 'name')
assert.equal(nestedAttrNode.attributeMatcher.value, 'test')

// 4. Invalid :attr throws EQUERYATTR
assert.throws(
  () => parser(':attr(foo, bar)'),
  { code: 'EQUERYATTR' }
)