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1 // Copyright 2014 the V8 project authors. All rights reserved. | 1 // Copyright 2014 the V8 project authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 // Flags: --harmony-arrow-functions | 5 // Flags: --harmony-arrow-functions |
6 | 6 |
7 // Arrow functions are like functions, except they throw when using the | 7 // Arrow functions are like functions, except they throw when using the |
8 // "new" operator on them. | 8 // "new" operator on them. |
9 assertEquals("function", typeof (() => {})); | 9 assertEquals("function", typeof (() => {})); |
10 assertEquals(Function.prototype, Object.getPrototypeOf(() => {})); | 10 assertEquals(Function.prototype, Object.getPrototypeOf(() => {})); |
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40 | 40 |
41 // Statement body needs braces, must use 'return' explicitly if not void | 41 // Statement body needs braces, must use 'return' explicitly if not void |
42 var evens = [0, 2, 4, 6, 8]; | 42 var evens = [0, 2, 4, 6, 8]; |
43 assertEquals([1, 3, 5, 7, 9], evens.map(v => v + 1)); | 43 assertEquals([1, 3, 5, 7, 9], evens.map(v => v + 1)); |
44 | 44 |
45 var fives = []; | 45 var fives = []; |
46 [1, 2, 3, 4, 5, 6, 7, 8, 9, 10].forEach(v => { | 46 [1, 2, 3, 4, 5, 6, 7, 8, 9, 10].forEach(v => { |
47 if (v % 5 === 0) fives.push(v); | 47 if (v % 5 === 0) fives.push(v); |
48 }); | 48 }); |
49 assertEquals([5, 10], fives); | 49 assertEquals([5, 10], fives); |
| 50 |
| 51 (function testRestrictedFunctionPropertiesStrict() { |
| 52 var arrowFn = () => { "use strict"; }; |
| 53 assertFalse(arrowFn.hasOwnProperty("arguments")); |
| 54 assertThrows(function() { return arrowFn.arguments; }, TypeError); |
| 55 assertThrows(function() { arrowFn.arguments = {}; }, TypeError); |
| 56 |
| 57 assertFalse(arrowFn.hasOwnProperty("caller")); |
| 58 assertThrows(function() { return arrowFn.caller; }, TypeError); |
| 59 assertThrows(function() { arrowFn.caller = {}; }, TypeError); |
| 60 })(); |
| 61 |
| 62 |
| 63 (function testRestrictedFunctionPropertiesSloppy() { |
| 64 var arrowFn = () => {}; |
| 65 assertFalse(arrowFn.hasOwnProperty("arguments")); |
| 66 assertThrows(function() { return arrowFn.arguments; }, TypeError); |
| 67 assertThrows(function() { arrowFn.arguments = {}; }, TypeError); |
| 68 |
| 69 assertFalse(arrowFn.hasOwnProperty("caller")); |
| 70 assertThrows(function() { return arrowFn.caller; }, TypeError); |
| 71 assertThrows(function() { arrowFn.caller = {}; }, TypeError); |
| 72 })(); |
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