@types/json-schema 7.0.15: verify JSONSchema7 type definitions and validation schema composition for draft-07

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 JSONSchema7 type definitions and validation schema composition for draft-07
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/%40types/json-schema@7.0.15

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:sha256:2d5205ff4d6b8f55a247264340f85fb51039d80e8bac9c458a8254afc5516440","contract":["package manifest specifies index.d.ts type declarations and TypeScript version","declares JSONSchema7TypeName, JSONSchema7Type, and JSONSchema7Definition type definitions","declares JSONSchema7 core metadata and definition properties including id, ref, schema, comment, and defs","declares JSONSchema7 numerical and string validation keyword properties","declares JSONSchema7 array and object constraint properties including items, properties, and dependencies","declares JSONSchema7 conditional logic and composition keywords including if, then, else, allOf, anyOf, oneOf, and not","declares ValidationResult and ValidationError interfaces and validate, checkPropertyChange, and mustBeValid utility functions"],"goal":"verify JSONSchema7 type definitions and validation schema composition for draft-07","kind":"HOW","packages":["pkg:npm/%40types/json-schema@7.0.15"],"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/%40types/json-schema@7.0.15"],"schemaVersion":1,"subject":"pkg:npm/%40types/json-schema@7.0.15","verifierAdapter":"node-typescript@1"}

{
  "name": "sample-types-json-schema",
  "version": "1.0.0",
  "lockfileVersion": 3,
  "requires": true,
  "packages": {
    "": {
      "name": "sample-types-json-schema",
      "version": "1.0.0",
      "license": "MIT-0",
      "dependencies": {
        "@types/json-schema": "7.0.15"
      }
    },
    "node_modules/@types/json-schema": {
      "version": "7.0.15",
      "resolved": "https://registry.npmjs.org/@types/json-schema/-/json-schema-7.0.15.tgz",
      "integrity": "sha512-5+fP8P8MFNC+AyZCDxrB2pkZFPGzqQWUzpSeuuVLvm8VMcorNYavBqoFcxK8bQz4Qsbn4oUEEem4wDLfcysGHA==",
      "license": "MIT"
    }
  }
}

{
  "name": "sample-types-json-schema",
  "version": "1.0.0",
  "private": true,
  "type": "module",
  "license": "MIT-0",
  "dependencies": {
    "@types/json-schema": "7.0.15"
  }
}

{
  "schemaVersion": 1,
  "goal": "verify JSONSchema7 type definitions and validation schema composition for draft-07",
  "kind": "HOW",
  "packages": [
    "pkg:npm/%40types/json-schema@7.0.15"
  ]
}

import assert from 'node:assert/strict';
import { createRequire } from 'node:module';
import fs from 'node:fs';
import path from 'node:path';

const require = createRequire(import.meta.url);

// 1. Resolve @types/json-schema package manifest and verify type declaration entry points
const pkgPath = require.resolve('@types/json-schema/package.json');
const pkg = JSON.parse(fs.readFileSync(pkgPath, 'utf8'));

assert.equal(pkg.name, '@types/json-schema', 'Package name must be @types/json-schema');
assert.equal(pkg.version, '7.0.15', 'Package version must be 7.0.15');
assert.equal(pkg.types, 'index.d.ts', 'Package types entry must point to index.d.ts');
assert.equal(pkg.typeScriptVersion, '4.5', 'TypeScript version must be 4.5');

const typesDir = path.dirname(pkgPath);
const dtsContent = fs.readFileSync(path.join(typesDir, 'index.d.ts'), 'utf8');

// 2. Verify JSONSchema7TypeName, JSONSchema7Type, and JSONSchema7Definition type definitions
assert.ok(
  dtsContent.includes('export type JSONSchema7TypeName =') &&
  dtsContent.includes('"string"') &&
  dtsContent.includes('"number"') &&
  dtsContent.includes('"integer"') &&
  dtsContent.includes('"boolean"') &&
  dtsContent.includes('"object"') &&
  dtsContent.includes('"array"') &&
  dtsContent.includes('"null"'),
  'JSONSchema7TypeName union must declare primitive schema type names'
);

assert.ok(
  dtsContent.includes('export type JSONSchema7Definition = JSONSchema7 | boolean;'),
  'JSONSchema7Definition must be a union of JSONSchema7 and boolean'
);

assert.ok(
  dtsContent.includes('export interface JSONSchema7Object {') &&
  dtsContent.includes('[key: string]: JSONSchema7Type;') &&
  dtsContent.includes('export interface JSONSchema7Array extends Array<JSONSchema7Type> {}'),
  'JSONSchema7Object and JSONSchema7Array recursive type interfaces must be defined'
);

// 3. Verify JSONSchema7 core metadata and definition properties including id, ref, schema, comment, and defs
assert.ok(
  dtsContent.includes('$id?: string | undefined;') &&
  dtsContent.includes('$ref?: string | undefined;') &&
  dtsContent.includes('$schema?: JSONSchema7Version | undefined;') &&
  dtsContent.includes('$comment?: string | undefined;') &&
  dtsContent.includes('$defs?: {') &&
  dtsContent.includes('[key: string]: JSONSchema7Definition;'),
  'JSONSchema7 core metadata and definition properties ($id, $ref, $schema, $comment, $defs) must be declared'
);

// 4. Verify JSONSchema7 numerical and string validation keyword properties
assert.ok(
  dtsContent.includes('multipleOf?: number | undefined;') &&
  dtsContent.includes('maximum?: number | undefined;') &&
  dtsContent.includes('exclusiveMaximum?: number | undefined;') &&
  dtsContent.includes('minimum?: number | undefined;') &&
  dtsContent.includes('exclusiveMinimum?: number | undefined;') &&
  dtsContent.includes('maxLength?: number | undefined;') &&
  dtsContent.includes('minLength?: number | undefined;') &&
  dtsContent.includes('pattern?: string | undefined;'),
  'JSONSchema7 numerical and string validation keywords must be declared'
);

// 5. Verify JSONSchema7 array and object constraint properties including items, properties, and dependencies
assert.ok(
  dtsContent.includes('items?: JSONSchema7Definition | JSONSchema7Definition[] | undefined;') &&
  dtsContent.includes('additionalItems?: JSONSchema7Definition | undefined;') &&
  dtsContent.includes('contains?: JSONSchema7Definition | undefined;') &&
  dtsContent.includes('properties?: {') &&
  dtsContent.includes('patternProperties?: {') &&
  dtsContent.includes('additionalProperties?: JSONSchema7Definition | undefined;') &&
  dtsContent.includes('dependencies?: {') &&
  dtsContent.includes('propertyNames?: JSONSchema7Definition | undefined;'),
  'JSONSchema7 array and object constraint keywords must be declared'
);

// 6. Verify JSONSchema7 conditional logic and composition keywords including if, then, else, allOf, anyOf, oneOf, and not
assert.ok(
  dtsContent.includes('if?: JSONSchema7Definition | undefined;') &&
  dtsContent.includes('then?: JSONSchema7Definition | undefined;') &&
  dtsContent.includes('else?: JSONSchema7Definition | undefined;') &&
  dtsContent.includes('allOf?: JSONSchema7Definition[] | undefined;') &&
  dtsContent.includes('anyOf?: JSONSchema7Definition[] | undefined;') &&
  dtsContent.includes('oneOf?: JSONSchema7Definition[] | undefined;') &&
  dtsContent.includes('not?: JSONSchema7Definition | undefined;'),
  'JSONSchema7 conditional (if/then/else) and combinator (allOf/anyOf/oneOf/not) keywords must be declared'
);

// 7. Verify ValidationResult and ValidationError interfaces and validate, checkPropertyChange, and mustBeValid utility functions
assert.ok(
  dtsContent.includes('export interface ValidationResult {') &&
  dtsContent.includes('valid: boolean;') &&
  dtsContent.includes('errors: ValidationError[];') &&
  dtsContent.includes('export interface ValidationError {') &&
  dtsContent.includes('export function validate(instance: {}, schema: JSONSchema4 | JSONSchema6 | JSONSchema7): ValidationResult;') &&
  dtsContent.includes('export function checkPropertyChange(') &&
  dtsContent.includes('export function mustBeValid(result: ValidationResult): void;'),
  'Validation utility functions and result structures must be declared'
);

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