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set.js1.7 KB · 51 lines
'use strict'; var test = require('tape'); var setDunderProto = require('../set'); test('setDunderProto', { skip: !setDunderProto }, function (t) {	if (!setDunderProto) {		throw 'should never happen; this is just for type narrowing'; // eslint-disable-line no-throw-literal	} 	// @ts-expect-error	t['throws'](function () { setDunderProto(); }, TypeError, 'throws if no arguments');	// @ts-expect-error	t['throws'](function () { setDunderProto(undefined); }, TypeError, 'throws with undefined and nothing');	// @ts-expect-error	t['throws'](function () { setDunderProto(undefined, undefined); }, TypeError, 'throws with undefined and undefined');	// @ts-expect-error	t['throws'](function () { setDunderProto(null); }, TypeError, 'throws with null and undefined');	// @ts-expect-error	t['throws'](function () { setDunderProto(null, undefined); }, TypeError, 'throws with null and undefined'); 	/** @type {{ inherited?: boolean }} */	var obj = {};	t.ok('toString' in obj, 'object initially has toString'); 	setDunderProto(obj, null);	t.notOk('toString' in obj, 'object no longer has toString'); 	t.notOk('inherited' in obj, 'object lacks inherited property');	setDunderProto(obj, { inherited: true });	t.equal(obj.inherited, true, 'object has inherited property'); 	t.end();}); test('no dunder proto', { skip: !!setDunderProto }, function (t) {	if ('__proto__' in Object.prototype) {		t['throws'](			// @ts-expect-error			function () { ({}).__proto__ = null; }, // eslint-disable-line no-proto			Error,			'throws when setting Object.prototype.__proto__'		);	} else {		t.notOk('__proto__' in Object.prototype, 'no __proto__ in Object.prototype');	} 	t.end();});