Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 1 | // Copyright 2016 the V8 project authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
| 5 | function enumerate(o) { |
| 6 | var keys = []; |
| 7 | for (var key in o) keys.push(key); |
| 8 | return keys; |
| 9 | } |
| 10 | |
| 11 | (function testSlowSloppyArgumentsElements() { |
| 12 | function slowSloppyArguments(a, b, c) { |
| 13 | arguments[10000] = "last"; |
| 14 | arguments[4000] = "first"; |
| 15 | arguments[6000] = "second"; |
| 16 | arguments[5999] = "x"; |
| 17 | arguments[3999] = "y"; |
| 18 | return arguments; |
| 19 | } |
| 20 | assertEquals(["0", "1", "2", "3999", "4000", "5999", "6000", "10000"], |
| 21 | Object.keys(slowSloppyArguments(1, 2, 3))); |
| 22 | |
| 23 | assertEquals(["0", "1", "2", "3999", "4000", "5999", "6000", "10000"], |
| 24 | enumerate(slowSloppyArguments(1,2,3))); |
| 25 | })(); |
| 26 | |
| 27 | (function testSlowSloppyArgumentsElementsNotEnumerable() { |
| 28 | function slowSloppyArguments(a, b, c) { |
| 29 | Object.defineProperty(arguments, 10000, { |
| 30 | enumerable: false, configurable: false, value: "NOPE" |
| 31 | }); |
| 32 | arguments[4000] = "first"; |
| 33 | arguments[6000] = "second"; |
| 34 | arguments[5999] = "x"; |
| 35 | arguments[3999] = "y"; |
| 36 | return arguments; |
| 37 | } |
| 38 | |
| 39 | assertEquals(["0", "1", "2", "3999", "4000", "5999", "6000"], |
| 40 | Object.keys(slowSloppyArguments(1, 2, 3))); |
| 41 | |
| 42 | assertEquals(["0", "1", "2", "3999", "4000", "5999", "6000"], |
| 43 | enumerate(slowSloppyArguments(1,2,3))); |
| 44 | })(); |
| 45 | |
| 46 | (function testFastSloppyArgumentsElements() { |
| 47 | function fastSloppyArguments(a, b, c) { |
| 48 | arguments[5] = 1; |
| 49 | arguments[7] = 0; |
| 50 | arguments[3] = 2; |
| 51 | return arguments; |
| 52 | } |
| 53 | assertEquals(["0", "1", "2", "3", "5", "7"], |
| 54 | Object.keys(fastSloppyArguments(1, 2, 3))); |
| 55 | |
| 56 | assertEquals( |
| 57 | ["0", "1", "2", "3", "5", "7"], enumerate(fastSloppyArguments(1, 2, 3))); |
| 58 | |
| 59 | function fastSloppyArguments2(a, b, c) { |
| 60 | delete arguments[0]; |
| 61 | arguments[0] = "test"; |
| 62 | return arguments; |
| 63 | } |
| 64 | |
| 65 | assertEquals(["0", "1", "2"], Object.keys(fastSloppyArguments2(1, 2, 3))); |
| 66 | assertEquals(["0", "1", "2"], enumerate(fastSloppyArguments2(1, 2, 3))); |
| 67 | })(); |
| 68 | |
| 69 | (function testFastSloppyArgumentsElementsNotEnumerable() { |
| 70 | function fastSloppyArguments(a, b, c) { |
| 71 | Object.defineProperty(arguments, 5, { |
| 72 | enumerable: false, configurable: false, value: "NOPE" |
| 73 | }); |
| 74 | arguments[7] = 0; |
| 75 | arguments[3] = 2; |
| 76 | return arguments; |
| 77 | } |
| 78 | assertEquals( |
| 79 | ["0", "1", "2", "3", "7"], Object.keys(fastSloppyArguments(1, 2, 3))); |
| 80 | |
| 81 | assertEquals( |
| 82 | ["0", "1", "2", "3", "7"], enumerate(fastSloppyArguments(1,2,3))); |
| 83 | |
| 84 | function fastSloppyArguments2(a, b, c) { |
| 85 | delete arguments[0]; |
| 86 | Object.defineProperty(arguments, 1, { |
| 87 | enumerable: false, configurable: false, value: "NOPE" |
| 88 | }); |
| 89 | arguments[0] = "test"; |
| 90 | return arguments; |
| 91 | } |
| 92 | |
| 93 | assertEquals(["0", "2"], Object.keys(fastSloppyArguments2(1, 2, 3))); |
| 94 | assertEquals(["0", "2"], enumerate(fastSloppyArguments2(1, 2, 3))); |
| 95 | })(); |