Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 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 |
| 3 | // found in the LICENSE file. |
| 4 | |
| 5 | // Flags: --allow-natives-syntax |
| 6 | |
| 7 | |
| 8 | // Note in general that "arguments.foo" and "var o = arguments; o.foo" |
| 9 | // are treated differently by full-codegen, and so both cases need to be |
| 10 | // tested. |
| 11 | |
| 12 | function TestDirectArgumentsIteratorProperty() { |
| 13 | assertTrue(arguments.hasOwnProperty(Symbol.iterator)); |
| 14 | assertFalse(arguments.propertyIsEnumerable(Symbol.iterator)); |
| 15 | var descriptor = Object.getOwnPropertyDescriptor(arguments, Symbol.iterator); |
| 16 | assertTrue(descriptor.writable); |
| 17 | assertFalse(descriptor.enumerable); |
| 18 | assertTrue(descriptor.configurable); |
| 19 | assertEquals(descriptor.value, [][Symbol.iterator]); |
| 20 | assertEquals(arguments[Symbol.iterator], [][Symbol.iterator]); |
| 21 | } |
| 22 | TestDirectArgumentsIteratorProperty(); |
| 23 | |
| 24 | |
| 25 | function TestIndirectArgumentsIteratorProperty() { |
| 26 | var o = arguments; |
| 27 | assertTrue(o.hasOwnProperty(Symbol.iterator)); |
| 28 | assertFalse(o.propertyIsEnumerable(Symbol.iterator)); |
| 29 | assertEquals(o[Symbol.iterator], [][Symbol.iterator]); |
| 30 | } |
| 31 | TestIndirectArgumentsIteratorProperty(); |
| 32 | |
| 33 | |
| 34 | function assertIteratorResult(value, done, result) { |
| 35 | assertEquals({value: value, done: done}, result); |
| 36 | } |
| 37 | |
| 38 | |
| 39 | function TestDirectValues1(a, b, c) { |
| 40 | var iterator = arguments[Symbol.iterator](); |
| 41 | assertIteratorResult(a, false, iterator.next()); |
| 42 | assertIteratorResult(b, false, iterator.next()); |
| 43 | assertIteratorResult(c, false, iterator.next()); |
| 44 | assertIteratorResult(undefined, true, iterator.next()); |
| 45 | } |
| 46 | TestDirectValues1(1, 2, 3); |
| 47 | |
| 48 | |
| 49 | function TestIndirectValues1(a, b, c) { |
| 50 | var args = arguments; |
| 51 | var iterator = args[Symbol.iterator](); |
| 52 | assertIteratorResult(a, false, iterator.next()); |
| 53 | assertIteratorResult(b, false, iterator.next()); |
| 54 | assertIteratorResult(c, false, iterator.next()); |
| 55 | assertIteratorResult(undefined, true, iterator.next()); |
| 56 | } |
| 57 | TestIndirectValues1(1, 2, 3); |
| 58 | |
| 59 | |
| 60 | function TestDirectValues2(a, b, c) { |
| 61 | var iterator = arguments[Symbol.iterator](); |
| 62 | assertIteratorResult(a, false, iterator.next()); |
| 63 | assertIteratorResult(b, false, iterator.next()); |
| 64 | assertIteratorResult(c, false, iterator.next()); |
| 65 | assertIteratorResult(undefined, true, iterator.next()); |
| 66 | |
| 67 | arguments[3] = 4; |
| 68 | arguments.length = 4; |
| 69 | assertIteratorResult(undefined, true, iterator.next()); |
| 70 | } |
| 71 | TestDirectValues2(1, 2, 3); |
| 72 | |
| 73 | |
| 74 | function TestIndirectValues2(a, b, c) { |
| 75 | var args = arguments; |
| 76 | var iterator = args[Symbol.iterator](); |
| 77 | assertIteratorResult(a, false, iterator.next()); |
| 78 | assertIteratorResult(b, false, iterator.next()); |
| 79 | assertIteratorResult(c, false, iterator.next()); |
| 80 | assertIteratorResult(undefined, true, iterator.next()); |
| 81 | |
| 82 | arguments[3] = 4; |
| 83 | arguments.length = 4; |
| 84 | assertIteratorResult(undefined, true, iterator.next()); |
| 85 | } |
| 86 | TestIndirectValues2(1, 2, 3); |
| 87 | |
| 88 | |
| 89 | function TestDirectValues3(a, b, c) { |
| 90 | var iterator = arguments[Symbol.iterator](); |
| 91 | assertIteratorResult(a, false, iterator.next()); |
| 92 | assertIteratorResult(b, false, iterator.next()); |
| 93 | |
| 94 | arguments.length = 2; |
| 95 | assertIteratorResult(undefined, true, iterator.next()); |
| 96 | } |
| 97 | TestDirectValues3(1, 2, 3); |
| 98 | |
| 99 | |
| 100 | function TestIndirectValues3(a, b, c) { |
| 101 | var args = arguments; |
| 102 | var iterator = args[Symbol.iterator](); |
| 103 | assertIteratorResult(a, false, iterator.next()); |
| 104 | assertIteratorResult(b, false, iterator.next()); |
| 105 | |
| 106 | arguments.length = 2; |
| 107 | assertIteratorResult(undefined, true, iterator.next()); |
| 108 | } |
| 109 | TestIndirectValues3(1, 2, 3); |
| 110 | |
| 111 | |
| 112 | function TestDirectValues4(a, b, c) { |
| 113 | var iterator = arguments[Symbol.iterator](); |
| 114 | assertIteratorResult(a, false, iterator.next()); |
| 115 | assertIteratorResult(b, false, iterator.next()); |
| 116 | assertIteratorResult(c, false, iterator.next()); |
| 117 | |
| 118 | arguments.length = 4; |
| 119 | assertIteratorResult(undefined, false, iterator.next()); |
| 120 | assertIteratorResult(undefined, true, iterator.next()); |
| 121 | } |
| 122 | TestDirectValues4(1, 2, 3); |
| 123 | |
| 124 | |
| 125 | function TestIndirectValues4(a, b, c) { |
| 126 | var args = arguments; |
| 127 | var iterator = args[Symbol.iterator](); |
| 128 | assertIteratorResult(a, false, iterator.next()); |
| 129 | assertIteratorResult(b, false, iterator.next()); |
| 130 | assertIteratorResult(c, false, iterator.next()); |
| 131 | |
| 132 | arguments.length = 4; |
| 133 | assertIteratorResult(undefined, false, iterator.next()); |
| 134 | assertIteratorResult(undefined, true, iterator.next()); |
| 135 | } |
| 136 | TestIndirectValues4(1, 2, 3); |
| 137 | |
| 138 | |
| 139 | function TestForOf() { |
| 140 | var i = 0; |
| 141 | for (var value of arguments) { |
| 142 | assertEquals(arguments[i++], value); |
| 143 | } |
| 144 | |
| 145 | assertEquals(arguments.length, i); |
| 146 | } |
| 147 | TestForOf(1, 2, 3, 4, 5); |
| 148 | |
| 149 | |
| 150 | function TestAssignmentToIterator() { |
| 151 | var i = 0; |
| 152 | arguments[Symbol.iterator] = [].entries; |
| 153 | for (var entry of arguments) { |
| 154 | assertEquals([i, arguments[i]], entry); |
| 155 | i++; |
| 156 | } |
| 157 | |
| 158 | assertEquals(arguments.length, i); |
| 159 | } |
| 160 | TestAssignmentToIterator(1, 2, 3, 4, 5); |
| 161 | |
| 162 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 163 | // Regression test for crbug.com/521484. |
| 164 | function TestAssignmentToIterator2() { |
| 165 | var i = 0; |
| 166 | arguments.__defineGetter__('callee', function(){}); |
| 167 | arguments.__defineGetter__('length', function(){ return 1 }); |
| 168 | arguments[Symbol.iterator] = [].entries; |
| 169 | for (var entry of arguments) { |
| 170 | assertEquals([i, arguments[i]], entry); |
| 171 | i++; |
| 172 | } |
| 173 | |
| 174 | assertEquals(arguments.length, i); |
| 175 | } |
| 176 | TestAssignmentToIterator2(1, 2, 3, 4, 5); |
| 177 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 178 | function TestArgumentsMutation() { |
| 179 | var i = 0; |
| 180 | for (var x of arguments) { |
| 181 | assertEquals(arguments[i], x); |
| 182 | arguments[i+1] *= 2; |
| 183 | i++; |
| 184 | } |
| 185 | |
| 186 | assertEquals(arguments.length, i); |
| 187 | } |
| 188 | TestArgumentsMutation(1, 2, 3, 4, 5); |
| 189 | |
| 190 | |
| 191 | function TestSloppyArgumentsAliasing(a0, a1, a2, a3, a4) { |
| 192 | var i = 0; |
| 193 | for (var x of arguments) { |
| 194 | assertEquals(arguments[i], x); |
| 195 | a0 = a1; a1 = a2; a3 = a4; |
| 196 | i++; |
| 197 | } |
| 198 | |
| 199 | assertEquals(arguments.length, i); |
| 200 | } |
| 201 | TestSloppyArgumentsAliasing(1, 2, 3, 4, 5); |
| 202 | |
| 203 | |
| 204 | function TestStrictArgumentsAliasing(a0, a1, a2, a3, a4) { |
| 205 | "use strict"; |
| 206 | var i = 0; |
| 207 | for (var x of arguments) { |
| 208 | a0 = a1; a1 = a2; a3 = a4; |
| 209 | assertEquals(arguments[i], x); |
| 210 | i++; |
| 211 | } |
| 212 | |
| 213 | assertEquals(arguments.length, i); |
| 214 | } |
| 215 | TestStrictArgumentsAliasing(1, 2, 3, 4, 5); |
| 216 | |
| 217 | |
| 218 | function TestArgumentsAsProto() { |
| 219 | "use strict"; |
| 220 | |
| 221 | var o = {__proto__:arguments}; |
| 222 | assertSame([][Symbol.iterator], o[Symbol.iterator]); |
| 223 | // Make o dict-mode. |
| 224 | %OptimizeObjectForAddingMultipleProperties(o, 0); |
| 225 | assertFalse(o.hasOwnProperty(Symbol.iterator)); |
| 226 | assertSame([][Symbol.iterator], o[Symbol.iterator]); |
| 227 | o[Symbol.iterator] = 10; |
| 228 | assertTrue(o.hasOwnProperty(Symbol.iterator)); |
| 229 | assertEquals(10, o[Symbol.iterator]); |
| 230 | assertSame([][Symbol.iterator], arguments[Symbol.iterator]); |
| 231 | |
| 232 | // Frozen o. |
| 233 | o = Object.freeze({__proto__:arguments}); |
| 234 | assertSame([][Symbol.iterator], o[Symbol.iterator]); |
| 235 | assertFalse(o.hasOwnProperty(Symbol.iterator)); |
| 236 | assertSame([][Symbol.iterator], o[Symbol.iterator]); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 237 | assertThrows(function () { o[Symbol.iterator] = 10 }); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 238 | assertFalse(o.hasOwnProperty(Symbol.iterator)); |
| 239 | assertEquals([][Symbol.iterator], o[Symbol.iterator]); |
| 240 | assertSame([][Symbol.iterator], arguments[Symbol.iterator]); |
| 241 | } |
| 242 | TestArgumentsAsProto(); |