/**
 * Copyright 2026 Google LLC
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import * as assert from 'assert';
import { describe, it } from 'node:test';
import { isObject } from '../../src/common/types.js';

describe('isObject', () => {
  it('accepts plain objects', () => {
    assert.strictEqual(isObject({}), true);
    assert.strictEqual(isObject({ a: 1 }), true);
  });

  it('rejects arrays', () => {
    // Arrays aren't records: config like `googleSearch: [...]` must fail
    // with a clear error instead of being read as an object.
    assert.strictEqual(isObject([]), false);
    assert.strictEqual(isObject([{ a: 1 }]), false);
  });

  it('rejects null and non-objects', () => {
    assert.strictEqual(isObject(null), false);
    assert.strictEqual(isObject(undefined), false);
    assert.strictEqual(isObject('text'), false);
    assert.strictEqual(isObject(1), false);
    assert.strictEqual(isObject(true), false);
  });
});