core-js/tests/unit-global/esnext.symbol.observable.js

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

QUnit.test('Symbol.observable', assert => {
  assert.true('observable' in Symbol, 'Symbol.observable available');
  assert.nonEnumerable(Symbol, 'observable');
  assert.true(Object(Symbol.observable) instanceof Symbol, 'Symbol.observable is symbol');
  if (DESCRIPTORS) {
    const descriptor = Object.getOwnPropertyDescriptor(Symbol, 'observable');
    assert.false(descriptor.enumerable, 'non-enumerable');
    assert.false(descriptor.writable, 'non-writable');
    assert.false(descriptor.configurable, 'non-configurable');
  }
});