index.js•1.3 kB
'use strict';
var $defineProperty = require('../');
var test = require('tape');
var gOPD = require('gopd');
test('defineProperty: supported', { skip: !$defineProperty }, function (t) {
t.plan(4);
t.equal(typeof $defineProperty, 'function', 'defineProperty is supported');
if ($defineProperty && gOPD) { // this `if` check is just to shut TS up
/** @type {{ a: number, b?: number, c?: number }} */
var o = { a: 1 };
$defineProperty(o, 'b', { enumerable: true, value: 2 });
t.deepEqual(
gOPD(o, 'b'),
{
configurable: false,
enumerable: true,
value: 2,
writable: false
},
'property descriptor is as expected'
);
$defineProperty(o, 'c', { enumerable: false, value: 3, writable: true });
t.deepEqual(
gOPD(o, 'c'),
{
configurable: false,
enumerable: false,
value: 3,
writable: true
},
'property descriptor is as expected'
);
}
t.equal($defineProperty, Object.defineProperty, 'defineProperty is Object.defineProperty');
t.end();
});
test('defineProperty: not supported', { skip: !!$defineProperty }, function (t) {
t.notOk($defineProperty, 'defineProperty is not supported');
t.match(
typeof $defineProperty,
/^(?:undefined|boolean)$/,
'`typeof defineProperty` is `undefined` or `boolean`'
);
t.end();
});