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node_modules/object.assign/test/native.js
| 47 lines
| 1.8 KiB
| application/javascript
| JavascriptLexer
|
| r789 | 'use strict'; | |||
| var test = require('tape'); | ||||
| var defineProperties = require('define-properties'); | ||||
| var isEnumerable = Object.prototype.propertyIsEnumerable; | ||||
| var functionsHaveNames = function f() {}.name === 'f'; | ||||
| var runTests = require('./tests'); | ||||
| test('native', function (t) { | ||||
| t.equal(Object.assign.length, 2, 'Object.assign has a length of 2'); | ||||
| t.test('Function name', { skip: !functionsHaveNames }, function (st) { | ||||
| st.equal(Object.assign.name, 'assign', 'Object.assign has name "assign"'); | ||||
| st.end(); | ||||
| }); | ||||
| t.test('enumerability', { skip: !defineProperties.supportsDescriptors }, function (et) { | ||||
| et.equal(false, isEnumerable.call(Object, 'assign'), 'Object.assign is not enumerable'); | ||||
| et.end(); | ||||
| }); | ||||
| var supportsStrictMode = (function () { return typeof this === 'undefined'; }()); | ||||
| t.test('bad object value', { skip: !supportsStrictMode }, function (st) { | ||||
| st['throws'](function () { return Object.assign(undefined); }, TypeError, 'undefined is not an object'); | ||||
| st['throws'](function () { return Object.assign(null); }, TypeError, 'null is not an object'); | ||||
| st.end(); | ||||
| }); | ||||
| // v8 in node 0.8 and 0.10 have non-enumerable string properties | ||||
| var stringCharsAreEnumerable = isEnumerable.call('xy', 0); | ||||
| t.test('when Object.assign is present and has pending exceptions', { skip: !stringCharsAreEnumerable || !Object.preventExtensions }, function (st) { | ||||
| // Firefox 37 still has "pending exception" logic in its Object.assign implementation, | ||||
| // which is 72% slower than our shim, and Firefox 40's native implementation. | ||||
| var thrower = Object.preventExtensions({ 1: '2' }); | ||||
| var error; | ||||
| try { Object.assign(thrower, 'xy'); } catch (e) { error = e; } | ||||
| st.equal(error instanceof TypeError, true, 'error is TypeError'); | ||||
| st.equal(thrower[1], '2', 'thrower[1] === "2"'); | ||||
| st.end(); | ||||
| }); | ||||
| runTests(Object.assign, t); | ||||
| t.end(); | ||||
| }); | ||||