basant307/AI_Governance_Project

1'use strict';2 3var assign = require('../');4assign.shim();5 6var test = require('tape');7var defineProperties = require('define-properties');8var isEnumerable = Object.prototype.propertyIsEnumerable;9var functionsHaveNames = require('functions-have-names')();10 11var runTests = require('./tests');12 13test('shimmed', function (t) {14	t.equal(Object.assign.length, 2, 'Object.assign has a length of 2');15	t.test('Function name', { skip: !functionsHaveNames }, function (st) {16		st.equal(Object.assign.name, 'assign', 'Object.assign has name "assign"');17		st.end();18	});19 20	t.test('enumerability', { skip: !defineProperties.supportsDescriptors }, function (et) {21		et.equal(false, isEnumerable.call(Object, 'assign'), 'Object.assign is not enumerable');22		et.end();23	});24 25	var supportsStrictMode = (function () { return typeof this === 'undefined'; }());26 27	t.test('bad object value', { skip: !supportsStrictMode }, function (st) {28		st['throws'](function () { return Object.assign(undefined); }, TypeError, 'undefined is not an object');29		st['throws'](function () { return Object.assign(null); }, TypeError, 'null is not an object');30		st.end();31	});32 33	// v8 in node 0.8 and 0.10 have non-enumerable string properties34	var stringCharsAreEnumerable = isEnumerable.call('xy', 0);35	t.test('when Object.assign is present and has pending exceptions', { skip: !stringCharsAreEnumerable || !Object.preventExtensions }, function (st) {36		/*37		 * Firefox 37 still has "pending exception" logic in its Object.assign implementation,38		 * which is 72% slower than our shim, and Firefox 40's native implementation.39		 */40		var thrower = Object.preventExtensions({ 1: '2' });41		var error;42		try { Object.assign(thrower, 'xy'); } catch (e) { error = e; }43		st.equal(error instanceof TypeError, true, 'error is TypeError');44		st.equal(thrower[1], '2', 'thrower[1] === "2"');45 46		st.end();47	});48 49	runTests(Object.assign, t);50 51	t.end();52});53