@eslint/config-array 0.19.2

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/%40eslint/config-array@0.19.2
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/%40eslint/config-array@0.19.2

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.

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{
  "name": "verify-eslint-config-array",
  "version": "1.0.0",
  "lockfileVersion": 3,
  "requires": true,
  "packages": {
    "": {
      "name": "verify-eslint-config-array",
      "version": "1.0.0",
      "dependencies": {
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      }
    },
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      "version": "0.19.2",
      "resolved": "https://registry.npmjs.org/@eslint/config-array/-/config-array-0.19.2.tgz",
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      "license": "Apache-2.0",
      "dependencies": {
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        "debug": "^4.3.1",
        "minimatch": "^3.1.2"
      },
      "engines": {
        "node": "^18.18.0 || ^20.9.0 || >=21.1.0"
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      "license": "MIT"
    },
    "node_modules/brace-expansion": {
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      "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-1.1.18.tgz",
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      "dependencies": {
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      "engines": {
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      "peerDependenciesMeta": {
        "supports-color": {
          "optional": true
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}

{
  "name": "verify-eslint-config-array",
  "version": "1.0.0",
  "type": "module",
  "dependencies": {
    "@eslint/config-array": "0.19.2"
  }
}

{
  "schemaVersion": 1,
  "goal": "verify pkg:npm/%40eslint/config-array@0.19.2",
  "kind": "HOW",
  "packages": [
    "pkg:npm/%40eslint/config-array@0.19.2"
  ]
}

import { ConfigArray, ConfigArraySymbol } from "@eslint/config-array";

/**
 * Creates and normalizes a ConfigArray instance with custom schema support.
 *
 * @param {Array<Object>} configs - Array of configuration objects.
 * @param {Object} [options] - Options including basePath and schema.
 * @returns {ConfigArray} Normalized ConfigArray instance.
 */
export function createConfigArray(configs, options = {}) {
  const configArray = new ConfigArray(configs, options);
  configArray.normalizeSync();
  return configArray;
}

export { ConfigArray, ConfigArraySymbol };

import assert from "node:assert/strict";
import { ConfigArray, createConfigArray } from "../src/index.mjs";

const customSchema = {
  settings: {
    validate(value) {
      if (typeof value !== "object" || value === null) {
        throw new TypeError("Settings must be an object");
      }
    },
    merge(first = {}, second = {}) {
      return { ...first, ...second };
    }
  },
  rules: {
    validate(value) {
      if (typeof value !== "object" || value === null) {
        throw new TypeError("Rules must be an object");
      }
    },
    merge(first = {}, second = {}) {
      return { ...first, ...second };
    }
  }
};

// 1. ConfigArray can be instantiated with config objects, basePath, and a custom schema
const rawConfigs = [
  {
    name: "base-js",
    files: ["**/*.js"],
    settings: { env: "node", version: 20 },
    rules: { semi: "always", quotes: "double" }
  },
  {
    name: "test-overrides",
    files: ["**/test/**/*.js", "**/*.test.js"],
    settings: { env: "jest" },
    rules: { quotes: "single" }
  },
  {
    name: "global-ignores",
    ignores: ["**/dist/**", "**/coverage/**", "build/"]
  }
];

const configArray = new ConfigArray(rawConfigs, {
  basePath: "/workspace/project",
  schema: customSchema
});

assert.ok(configArray instanceof ConfigArray, "configArray must be an instance of ConfigArray");
assert.equal(configArray.basePath, "/workspace/project", "basePath should match constructor option");
assert.equal(configArray.isNormalized(), false, "isNormalized should initially be false");

// 2. normalizeSync normalizes the config array and sets isNormalized to true
configArray.normalizeSync();
assert.equal(configArray.isNormalized(), true, "isNormalized should be true after normalizeSync()");

// 3. getConfig returns the merged configuration object for files matching glob patterns
const srcConfig = configArray.getConfig("/workspace/project/src/index.js");
assert.ok(srcConfig, "src/index.js should have a matching config");
assert.deepEqual(srcConfig.settings, { env: "node", version: 20 }, "src/index.js settings should match base-js");
assert.equal(srcConfig.rules.semi, "always", "rules.semi should be always");
assert.equal(srcConfig.rules.quotes, "double", "rules.quotes should be double");

// 4. getConfig applies overrides according to config array precedence order
const testConfig = configArray.getConfig("/workspace/project/test/unit.test.js");
assert.ok(testConfig, "test/unit.test.js should have a matching config");
assert.deepEqual(
  testConfig.settings,
  { env: "jest", version: 20 },
  "test config should merge base settings with test-overrides settings"
);
assert.equal(testConfig.rules.quotes, "single", "test config should override quotes rule to single");
assert.equal(testConfig.rules.semi, "always", "test config should inherit unmodified semi rule");

// 5. getConfigStatus returns matched for configured files and unconfigured for non-matching files
const srcStatus = configArray.getConfigStatus("/workspace/project/src/index.js");
assert.equal(srcStatus, "matched", "status for matched file should be matched");

const txtStatus = configArray.getConfigStatus("/workspace/project/README.txt");
assert.equal(txtStatus, "unconfigured", "status for unconfigured file should be unconfigured");

// 6. isFileIgnored returns true for paths matching ignore patterns and false otherwise
assert.equal(configArray.isFileIgnored("/workspace/project/dist/bundle.js"), true, "dist/bundle.js should be ignored");
assert.equal(configArray.isFileIgnored("/workspace/project/coverage/lcov.info"), true, "coverage file should be ignored");
assert.equal(configArray.isFileIgnored("/workspace/project/src/index.js"), false, "src/index.js should not be ignored");

// 7. isDirectoryIgnored correctly identifies ignored directories
assert.equal(configArray.isDirectoryIgnored("/workspace/project/build"), true, "build/ directory should be ignored");
assert.equal(configArray.isDirectoryIgnored("/workspace/project/src"), false, "src directory should not be ignored");

// Helper createConfigArray test
const helperInstance = createConfigArray(rawConfigs, {
  basePath: "/workspace/project",
  schema: customSchema
});
assert.ok(helperInstance.isNormalized(), "createConfigArray returns a pre-normalized instance");
assert.deepEqual(
  helperInstance.getConfig("/workspace/project/src/index.js"),
  srcConfig,
  "helper instance matches standalone instance behavior"
);

console.log("All contract assertions for @eslint/config-array passed successfully.");