Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 1 | // Copyright 2013 the V8 project authors. All rights reserved. |
| 2 | // Redistribution and use in source and binary forms, with or without |
| 3 | // modification, are permitted provided that the following conditions are |
| 4 | // met: |
| 5 | // |
| 6 | // * Redistributions of source code must retain the above copyright |
| 7 | // notice, this list of conditions and the following disclaimer. |
| 8 | // * Redistributions in binary form must reproduce the above |
| 9 | // copyright notice, this list of conditions and the following |
| 10 | // disclaimer in the documentation and/or other materials provided |
| 11 | // with the distribution. |
| 12 | // * Neither the name of Google Inc. nor the names of its |
| 13 | // contributors may be used to endorse or promote products derived |
| 14 | // from this software without specific prior written permission. |
| 15 | // |
| 16 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 17 | // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 18 | // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 19 | // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 20 | // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 21 | // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 22 | // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 23 | // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 24 | // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 25 | // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 26 | // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | |
| 28 | // Flags: --expose-gc --allow-natives-syntax |
| 29 | |
| 30 | var symbols = [] |
| 31 | |
| 32 | |
| 33 | // Returns true if the string is a valid |
| 34 | // serialization of Symbols added to the 'symbols' |
| 35 | // array. Adjust if you extend 'symbols' with other |
| 36 | // values. |
| 37 | function isValidSymbolString(s) { |
| 38 | return ["Symbol(66)"].indexOf(s) >= 0; |
| 39 | } |
| 40 | |
| 41 | |
| 42 | // Test different forms of constructor calls, all equivalent. |
| 43 | function TestNew() { |
| 44 | for (var i = 0; i < 2; ++i) { |
| 45 | for (var j = 0; j < 5; ++j) { |
| 46 | symbols.push(%CreatePrivateSymbol("66")) |
| 47 | symbols.push(Object(%CreatePrivateSymbol("66")).valueOf()) |
| 48 | } |
| 49 | gc() // Promote existing symbols and then allocate some more. |
| 50 | } |
| 51 | } |
| 52 | TestNew() |
| 53 | |
| 54 | |
| 55 | function TestType() { |
| 56 | for (var i in symbols) { |
| 57 | assertEquals("symbol", typeof symbols[i]) |
| 58 | assertTrue(typeof symbols[i] === "symbol") |
| 59 | assertTrue(%SymbolIsPrivate(symbols[i])) |
| 60 | assertEquals(null, %_ClassOf(symbols[i])) |
| 61 | assertEquals("Symbol", %_ClassOf(Object(symbols[i]))) |
| 62 | } |
| 63 | } |
| 64 | TestType() |
| 65 | |
| 66 | |
| 67 | function TestPrototype() { |
| 68 | for (var i in symbols) { |
| 69 | assertSame(Symbol.prototype, symbols[i].__proto__) |
| 70 | } |
| 71 | } |
| 72 | TestPrototype() |
| 73 | |
| 74 | |
| 75 | function TestConstructor() { |
| 76 | for (var i in symbols) { |
| 77 | assertSame(Symbol, symbols[i].__proto__.constructor) |
| 78 | assertSame(Symbol, Object(symbols[i]).__proto__.constructor) |
| 79 | } |
| 80 | } |
| 81 | TestConstructor() |
| 82 | |
| 83 | |
| 84 | function TestToString() { |
| 85 | for (var i in symbols) { |
| 86 | assertThrows(function() {new String(symbols[i]) }, TypeError) |
| 87 | assertEquals(symbols[i].toString(), String(symbols[i])) |
| 88 | assertThrows(function() { symbols[i] + "" }, TypeError) |
| 89 | assertTrue(isValidSymbolString(symbols[i].toString())) |
| 90 | assertTrue(isValidSymbolString(Object(symbols[i]).toString())) |
| 91 | assertTrue(isValidSymbolString(Symbol.prototype.toString.call(symbols[i]))) |
| 92 | assertEquals( |
| 93 | "[object Symbol]", Object.prototype.toString.call(symbols[i])) |
| 94 | } |
| 95 | } |
| 96 | TestToString() |
| 97 | |
| 98 | |
| 99 | function TestToBoolean() { |
| 100 | for (var i in symbols) { |
| 101 | assertTrue(Boolean(symbols[i]).valueOf()) |
| 102 | assertFalse(!symbols[i]) |
| 103 | assertTrue(!!symbols[i]) |
| 104 | assertTrue(symbols[i] && true) |
| 105 | assertFalse(!symbols[i] && false) |
| 106 | assertTrue(!symbols[i] || true) |
| 107 | assertEquals(1, symbols[i] ? 1 : 2) |
| 108 | assertEquals(2, !symbols[i] ? 1 : 2) |
| 109 | if (!symbols[i]) assertUnreachable(); |
| 110 | if (symbols[i]) {} else assertUnreachable(); |
| 111 | } |
| 112 | } |
| 113 | TestToBoolean() |
| 114 | |
| 115 | |
| 116 | function TestToNumber() { |
| 117 | for (var i in symbols) { |
| 118 | assertThrows(function() { Number(symbols[i]); }, TypeError); |
| 119 | assertThrows(function() { symbols[i] + 0; }, TypeError); |
| 120 | } |
| 121 | } |
| 122 | TestToNumber() |
| 123 | |
| 124 | |
| 125 | function TestEquality() { |
| 126 | // Every symbol should equal itself, and non-strictly equal its wrapper. |
| 127 | for (var i in symbols) { |
| 128 | assertSame(symbols[i], symbols[i]) |
| 129 | assertEquals(symbols[i], symbols[i]) |
| 130 | assertTrue(Object.is(symbols[i], symbols[i])) |
| 131 | assertTrue(symbols[i] === symbols[i]) |
| 132 | assertTrue(symbols[i] == symbols[i]) |
| 133 | assertFalse(symbols[i] === Object(symbols[i])) |
| 134 | assertFalse(Object(symbols[i]) === symbols[i]) |
| 135 | assertFalse(symbols[i] == Object(symbols[i])) |
| 136 | assertFalse(Object(symbols[i]) == symbols[i]) |
| 137 | assertTrue(symbols[i] === symbols[i].valueOf()) |
| 138 | assertTrue(symbols[i].valueOf() === symbols[i]) |
| 139 | assertTrue(symbols[i] == symbols[i].valueOf()) |
| 140 | assertTrue(symbols[i].valueOf() == symbols[i]) |
| 141 | } |
| 142 | |
| 143 | // All symbols should be distinct. |
| 144 | for (var i = 0; i < symbols.length; ++i) { |
| 145 | for (var j = i + 1; j < symbols.length; ++j) { |
| 146 | assertFalse(Object.is(symbols[i], symbols[j])) |
| 147 | assertFalse(symbols[i] === symbols[j]) |
| 148 | assertFalse(symbols[i] == symbols[j]) |
| 149 | } |
| 150 | } |
| 151 | |
| 152 | // Symbols should not be equal to any other value (and the test terminates). |
| 153 | var values = [347, 1.275, NaN, "string", null, undefined, {}, function() {}] |
| 154 | for (var i in symbols) { |
| 155 | for (var j in values) { |
| 156 | assertFalse(symbols[i] === values[j]) |
| 157 | assertFalse(values[j] === symbols[i]) |
| 158 | assertFalse(symbols[i] == values[j]) |
| 159 | assertFalse(values[j] == symbols[i]) |
| 160 | } |
| 161 | } |
| 162 | } |
| 163 | TestEquality() |
| 164 | |
| 165 | |
| 166 | function TestGet() { |
| 167 | for (var i in symbols) { |
| 168 | assertTrue(isValidSymbolString(symbols[i].toString())) |
| 169 | assertEquals(symbols[i], symbols[i].valueOf()) |
| 170 | assertEquals(undefined, symbols[i].a) |
| 171 | assertEquals(undefined, symbols[i]["a" + "b"]) |
| 172 | assertEquals(undefined, symbols[i]["" + "1"]) |
| 173 | assertEquals(undefined, symbols[i][62]) |
| 174 | } |
| 175 | } |
| 176 | TestGet() |
| 177 | |
| 178 | |
| 179 | function TestSet() { |
| 180 | for (var i in symbols) { |
| 181 | symbols[i].toString = 0 |
| 182 | assertTrue(isValidSymbolString(symbols[i].toString())) |
| 183 | symbols[i].valueOf = 0 |
| 184 | assertEquals(symbols[i], symbols[i].valueOf()) |
| 185 | symbols[i].a = 0 |
| 186 | assertEquals(undefined, symbols[i].a) |
| 187 | symbols[i]["a" + "b"] = 0 |
| 188 | assertEquals(undefined, symbols[i]["a" + "b"]) |
| 189 | symbols[i][62] = 0 |
| 190 | assertEquals(undefined, symbols[i][62]) |
| 191 | } |
| 192 | } |
| 193 | TestSet() |
| 194 | |
| 195 | |
| 196 | function TestCollections() { |
| 197 | var set = new Set |
| 198 | var map = new Map |
| 199 | var weakmap = new WeakMap |
| 200 | for (var i in symbols) { |
| 201 | set.add(symbols[i]) |
| 202 | map.set(symbols[i], i) |
| 203 | weakmap.set(symbols[i], i) |
| 204 | } |
| 205 | assertEquals(symbols.length, set.size) |
| 206 | assertEquals(symbols.length, map.size) |
| 207 | for (var i in symbols) { |
| 208 | assertTrue(set.has(symbols[i])) |
| 209 | assertTrue(map.has(symbols[i])) |
| 210 | assertTrue(weakmap.has(symbols[i])) |
| 211 | assertEquals(i, map.get(symbols[i])) |
| 212 | assertEquals(i, weakmap.get(symbols[i])) |
| 213 | } |
| 214 | for (var i in symbols) { |
| 215 | assertTrue(set.delete(symbols[i])) |
| 216 | assertTrue(map.delete(symbols[i])) |
| 217 | assertTrue(weakmap.delete(symbols[i])) |
| 218 | } |
| 219 | assertEquals(0, set.size) |
| 220 | assertEquals(0, map.size) |
| 221 | } |
| 222 | TestCollections() |
| 223 | |
| 224 | |
| 225 | |
| 226 | function TestKeySet(obj) { |
| 227 | assertTrue(%HasFastProperties(obj)) |
| 228 | // Set the even symbols via assignment. |
| 229 | for (var i = 0; i < symbols.length; i += 2) { |
| 230 | obj[symbols[i]] = i |
| 231 | // Object should remain in fast mode until too many properties were added. |
| 232 | assertTrue(%HasFastProperties(obj) || i >= 30) |
| 233 | } |
| 234 | } |
| 235 | |
| 236 | |
| 237 | function TestKeyDefine(obj) { |
| 238 | // Set the odd symbols via defineProperty (as non-enumerable). |
| 239 | for (var i = 1; i < symbols.length; i += 2) { |
| 240 | Object.defineProperty(obj, symbols[i], {value: i, configurable: true}) |
| 241 | } |
| 242 | } |
| 243 | |
| 244 | |
| 245 | function TestKeyGet(obj) { |
| 246 | var obj2 = Object.create(obj) |
| 247 | for (var i in symbols) { |
| 248 | assertEquals(i|0, obj[symbols[i]]) |
| 249 | assertEquals(i|0, obj2[symbols[i]]) |
| 250 | } |
| 251 | } |
| 252 | |
| 253 | |
| 254 | function TestKeyHas() { |
| 255 | for (var i in symbols) { |
| 256 | assertTrue(symbols[i] in obj) |
| 257 | assertTrue(Object.hasOwnProperty.call(obj, symbols[i])) |
| 258 | } |
| 259 | } |
| 260 | |
| 261 | |
| 262 | function TestKeyEnum(obj) { |
| 263 | for (var name in obj) { |
| 264 | assertEquals("string", typeof name) |
| 265 | } |
| 266 | } |
| 267 | |
| 268 | |
| 269 | function TestKeyNames(obj) { |
| 270 | assertEquals(0, Object.keys(obj).length) |
| 271 | |
| 272 | var names = Object.getOwnPropertyNames(obj) |
| 273 | for (var i in names) { |
| 274 | assertEquals("string", typeof names[i]) |
| 275 | } |
| 276 | } |
| 277 | |
| 278 | |
| 279 | function TestKeyDescriptor(obj) { |
| 280 | for (var i in symbols) { |
| 281 | var desc = Object.getOwnPropertyDescriptor(obj, symbols[i]); |
| 282 | assertEquals(i|0, desc.value) |
| 283 | assertTrue(desc.configurable) |
| 284 | assertEquals(i % 2 == 0, desc.writable) |
| 285 | assertEquals(i % 2 == 0, desc.enumerable) |
| 286 | assertEquals(i % 2 == 0, |
| 287 | Object.prototype.propertyIsEnumerable.call(obj, symbols[i])) |
| 288 | } |
| 289 | } |
| 290 | |
| 291 | |
| 292 | function TestKeyDelete(obj) { |
| 293 | for (var i in symbols) { |
| 294 | delete obj[symbols[i]] |
| 295 | } |
| 296 | for (var i in symbols) { |
| 297 | assertEquals(undefined, Object.getOwnPropertyDescriptor(obj, symbols[i])) |
| 298 | } |
| 299 | } |
| 300 | |
| 301 | |
| 302 | var objs = [{}, [], Object.create(null), Object(1), new Map, function(){}] |
| 303 | |
| 304 | for (var i in objs) { |
| 305 | var obj = objs[i] |
| 306 | TestKeySet(obj) |
| 307 | TestKeyDefine(obj) |
| 308 | TestKeyGet(obj) |
| 309 | TestKeyHas(obj) |
| 310 | TestKeyEnum(obj) |
| 311 | TestKeyNames(obj) |
| 312 | TestKeyDescriptor(obj) |
| 313 | TestKeyDelete(obj) |
| 314 | } |
| 315 | |
| 316 | |
| 317 | function TestCachedKeyAfterScavenge() { |
| 318 | gc(); |
| 319 | // Keyed property lookup are cached. Hereby we assume that the keys are |
| 320 | // tenured, so that we only have to clear the cache between mark compacts, |
| 321 | // but not between scavenges. This must also apply for symbol keys. |
| 322 | var key = Symbol("key"); |
| 323 | var a = {}; |
| 324 | a[key] = "abc"; |
| 325 | |
| 326 | for (var i = 0; i < 100000; i++) { |
| 327 | a[key] += "a"; // Allocations cause a scavenge. |
| 328 | } |
| 329 | } |
| 330 | TestCachedKeyAfterScavenge(); |
| 331 | |
| 332 | |
| 333 | function TestGetOwnPropertySymbols() { |
| 334 | var privateSymbol = %CreatePrivateSymbol("private") |
| 335 | var publicSymbol = Symbol() |
| 336 | var publicSymbol2 = Symbol() |
| 337 | var obj = {} |
| 338 | obj[publicSymbol] = 1 |
| 339 | obj[privateSymbol] = 2 |
| 340 | obj[publicSymbol2] = 3 |
| 341 | var syms = Object.getOwnPropertySymbols(obj) |
| 342 | assertEquals(syms, [publicSymbol, publicSymbol2]) |
| 343 | } |
| 344 | TestGetOwnPropertySymbols() |
| 345 | |
| 346 | |
| 347 | function TestSealAndFreeze(freeze) { |
| 348 | var sym = %CreatePrivateSymbol("private") |
| 349 | var obj = {} |
| 350 | obj[sym] = 1 |
| 351 | freeze(obj) |
| 352 | obj[sym] = 2 |
| 353 | assertEquals(2, obj[sym]) |
| 354 | assertTrue(delete obj[sym]) |
| 355 | assertEquals(undefined, obj[sym]) |
| 356 | } |
| 357 | TestSealAndFreeze(Object.seal) |
| 358 | TestSealAndFreeze(Object.freeze) |
| 359 | TestSealAndFreeze(Object.preventExtensions) |