core-js/tests/unit-global/es.object.define-properties.js

import { DESCRIPTORS } from '../helpers/constants.js';

QUnit.test('Object.defineProperties', assert => {
  const { defineProperties } = Object;
  assert.isFunction(defineProperties);
  assert.arity(defineProperties, 2);
  assert.name(defineProperties, 'defineProperties');
  assert.looksNative(defineProperties);
  assert.nonEnumerable(Object, 'defineProperties');
  const source = {};
  const result = defineProperties(source, { q: { value: 42 }, w: { value: 33 } });
  assert.same(result, source);
  assert.same(result.q, 42);
  assert.same(result.w, 33);

  if (DESCRIPTORS) {
    // eslint-disable-next-line prefer-arrow-callback -- required for testing
    assert.same(defineProperties(function () { /* empty */ }, { prototype: {
      value: 42,
      writable: false,
    } }).prototype, 42, 'function prototype with non-writable descriptor');
  }
});

QUnit.test('Object.defineProperties.sham flag', assert => {
  assert.same(Object.defineProperties.sham, DESCRIPTORS ? undefined : true);
});