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| 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 // Flags: --harmony-object-values-entries | |
| 6 // Flags: --allow-natives-syntax | |
| 7 | |
| 8 function TestMeta() { | |
| 9 assertEquals(1, Object.entries.length); | |
| 10 assertEquals(Function.prototype, Object.getPrototypeOf(Object.entries)); | |
| 11 assertEquals("entries", Object.entries.name); | |
| 12 | |
| 13 var descriptor = Object.getOwnPropertyDescriptor(Object, "entries"); | |
| 14 assertTrue(descriptor.writable); | |
| 15 assertFalse(descriptor.enumerable); | |
| 16 assertTrue(descriptor.configurable); | |
| 17 | |
| 18 assertThrows(() => new Object.entries({}), TypeError); | |
| 19 } | |
| 20 TestMeta(); | |
| 21 | |
| 22 | |
| 23 function TestBasic() { | |
| 24 var x = 16; | |
| 25 var O = { | |
| 26 d: 1, | |
| 27 c: 3, | |
| 28 [Symbol.iterator]: void 0, | |
| 29 0: 123, | |
| 30 1000: 456, | |
| 31 [x * x]: "ducks", | |
| 32 [`0x${(x * x).toString(16)}`]: "quack" | |
| 33 }; | |
| 34 O.a = 2; | |
| 35 O.b = 4; | |
| 36 Object.defineProperty(O, "HIDDEN", { enumerable: false, value: NaN }); | |
| 37 assertEquals([ | |
| 38 ["0", 123], | |
| 39 ["256", "ducks"], | |
| 40 ["1000", 456], | |
| 41 ["d", 1], | |
| 42 ["c", 3], | |
| 43 ["0x100", "quack"], | |
| 44 ["a", 2], | |
| 45 ["b", 4] | |
| 46 ], Object.entries(O)); | |
| 47 assertEquals(Object.entries(O), Object.keys(O).map(key => [key, O[key]])); | |
| 48 | |
| 49 assertTrue(Array.isArray(Object.entries({}))); | |
| 50 assertEquals(0, Object.entries({}).length); | |
| 51 } | |
| 52 TestBasic(); | |
| 53 | |
| 54 | |
| 55 function TestToObject() { | |
| 56 assertThrows(function() { Object.entries(); }, TypeError); | |
| 57 assertThrows(function() { Object.entries(null); }, TypeError); | |
| 58 assertThrows(function() { Object.entries(void 0); }, TypeError); | |
| 59 } | |
| 60 TestToObject(); | |
| 61 | |
| 62 | |
| 63 function TestOrder() { | |
| 64 var O = { | |
| 65 a: 1, | |
| 66 [Symbol.iterator]: null | |
| 67 }; | |
| 68 O[456] = 123; | |
| 69 Object.defineProperty(O, "HIDDEN", { enumerable: false, value: NaN }); | |
| 70 var priv = %CreatePrivateSymbol("Secret"); | |
| 71 O[priv] = 56; | |
| 72 | |
| 73 var log = []; | |
| 74 var P = new Proxy(O, { | |
| 75 ownKeys(target) { | |
| 76 log.push("[[OwnPropertyKeys]]"); | |
| 77 return Reflect.ownKeys(target); | |
| 78 }, | |
| 79 get(target, name) { | |
| 80 log.push(`[[Get]](${JSON.stringify(name)})`); | |
| 81 return Reflect.get(target, name); | |
| 82 }, | |
| 83 getOwnPropertyDescriptor(target, name) { | |
| 84 log.push(`[[GetOwnProperty]](${JSON.stringify(name)})`); | |
| 85 return Reflect.getOwnPropertyDescriptor(target, name); | |
| 86 }, | |
| 87 set(target, name, value) { | |
| 88 assertUnreachable(); | |
| 89 } | |
| 90 }); | |
| 91 | |
| 92 assertEquals([["456", 123], ["a", 1]], Object.entries(P)); | |
| 93 assertEquals([ | |
| 94 "[[OwnPropertyKeys]]", | |
| 95 "[[GetOwnProperty]](\"456\")", | |
| 96 "[[Get]](\"456\")", | |
| 97 "[[GetOwnProperty]](\"a\")", | |
| 98 "[[Get]](\"a\")", | |
| 99 "[[GetOwnProperty]](\"HIDDEN\")" | |
| 100 ], log); | |
| 101 } | |
| 102 TestOrder(); | |
| 103 | |
| 104 | |
| 105 function TestOrderWithDuplicates() { | |
| 106 var O = { | |
| 107 a: 1, | |
| 108 [Symbol.iterator]: null | |
| 109 }; | |
| 110 O[456] = 123; | |
| 111 Object.defineProperty(O, "HIDDEN", { enumerable: false, value: NaN }); | |
| 112 var priv = %CreatePrivateSymbol("Secret"); | |
| 113 O[priv] = 56; | |
| 114 | |
| 115 var log = []; | |
| 116 var P = new Proxy(O, { | |
| 117 ownKeys(target) { | |
| 118 log.push("[[OwnPropertyKeys]]"); | |
| 119 return ["a", Symbol.iterator, "a", "456", "HIDDEN", "HIDDEN", "456"]; | |
| 120 }, | |
| 121 get(target, name) { | |
| 122 log.push(`[[Get]](${JSON.stringify(name)})`); | |
| 123 return Reflect.get(target, name); | |
| 124 }, | |
| 125 getOwnPropertyDescriptor(target, name) { | |
| 126 log.push(`[[GetOwnProperty]](${JSON.stringify(name)})`); | |
| 127 return Reflect.getOwnPropertyDescriptor(target, name); | |
| 128 }, | |
| 129 set(target, name, value) { | |
| 130 assertUnreachable(); | |
| 131 } | |
| 132 }); | |
| 133 | |
| 134 assertEquals([ | |
| 135 ["a", 1], | |
| 136 ["a", 1], | |
| 137 ["456", 123], | |
| 138 ["456", 123] | |
| 139 ], Object.entries(P)); | |
| 140 assertEquals([ | |
| 141 "[[OwnPropertyKeys]]", | |
| 142 "[[GetOwnProperty]](\"a\")", | |
| 143 "[[Get]](\"a\")", | |
| 144 "[[GetOwnProperty]](\"a\")", | |
| 145 "[[Get]](\"a\")", | |
| 146 "[[GetOwnProperty]](\"456\")", | |
| 147 "[[Get]](\"456\")", | |
| 148 "[[GetOwnProperty]](\"HIDDEN\")", | |
| 149 "[[GetOwnProperty]](\"HIDDEN\")", | |
| 150 "[[GetOwnProperty]](\"456\")", | |
| 151 "[[Get]](\"456\")" | |
| 152 ], log); | |
| 153 } | |
| 154 TestOrderWithDuplicates(); | |
| 155 | |
| 156 | |
| 157 function TestPropertyFilter() { | |
| 158 var object = { prop3: 30 }; | |
| 159 object[2] = 40; | |
| 160 object["prop4"] = 50; | |
| 161 Object.defineProperty(object, "prop5", { value: 60, enumerable: true }); | |
| 162 Object.defineProperty(object, "prop6", { value: 70, enumerable: false }); | |
| 163 Object.defineProperty(object, "prop7", { | |
| 164 enumerable: true, get() { return 80; }}); | |
| 165 var sym = Symbol("prop8"); | |
| 166 object[sym] = 90; | |
| 167 | |
| 168 values = Object.entries(object); | |
| 169 assertEquals(5, values.length); | |
| 170 assertEquals([ | |
| 171 [ "2", 40 ], | |
| 172 [ "prop3", 30 ], | |
| 173 [ "prop4", 50 ], | |
| 174 [ "prop5", 60 ], | |
| 175 [ "prop7", 80 ] | |
| 176 ], values); | |
| 177 } | |
| 178 TestPropertyFilter(); | |
| 179 | |
| 180 | |
| 181 function TestWithProxy() { | |
| 182 var obj1 = {prop1:10}; | |
| 183 var proxy1 = new Proxy(obj1, { }); | |
| 184 assertEquals([ [ "prop1", 10 ] ], Object.entries(proxy1)); | |
| 185 | |
| 186 var obj2 = {}; | |
| 187 Object.defineProperty(obj2, "prop2", { value: 20, enumerable: true }); | |
| 188 Object.defineProperty(obj2, "prop3", { | |
| 189 get() { return 30; }, enumerable: true }); | |
| 190 var proxy2 = new Proxy(obj2, { | |
| 191 getOwnPropertyDescriptor(target, name) { | |
| 192 return Reflect.getOwnPropertyDescriptor(target, name); | |
| 193 } | |
| 194 }); | |
| 195 assertEquals([ [ "prop2", 20 ], [ "prop3", 30 ] ], Object.entries(proxy2)); | |
| 196 | |
| 197 var obj3 = {}; | |
| 198 var count = 0; | |
| 199 var proxy3 = new Proxy(obj3, { | |
| 200 get(target, property, receiver) { | |
| 201 return count++ * 5; | |
| 202 }, | |
| 203 getOwnPropertyDescriptor(target, property) { | |
| 204 return { configurable: true, enumerable: true }; | |
| 205 }, | |
| 206 ownKeys(target) { | |
| 207 return [ "prop0", "prop1", Symbol("prop2"), Symbol("prop5") ]; | |
| 208 } | |
| 209 }); | |
| 210 assertEquals([ [ "prop0", 0 ], [ "prop1", 5 ] ], Object.entries(proxy3)); | |
| 211 } | |
| 212 TestWithProxy(); | |
| 213 | |
| 214 | |
| 215 function TestMutateDuringEnumeration() { | |
| 216 var aDeletesB = { | |
| 217 get a() { | |
| 218 delete this.b; | |
| 219 return 1; | |
| 220 }, | |
| 221 b: 2 | |
| 222 }; | |
| 223 assertEquals([ [ "a", 1 ] ], Object.entries(aDeletesB)); | |
| 224 | |
| 225 var aRemovesB = { | |
| 226 get a() { | |
| 227 Object.defineProperty(this, "b", { enumerable: false }); | |
| 228 return 1; | |
| 229 }, | |
| 230 b: 2 | |
| 231 }; | |
| 232 assertEquals([ [ "a", 1 ] ], Object.entries(aRemovesB)); | |
| 233 | |
| 234 var aAddsB = { get a() { this.b = 2; return 1; } }; | |
| 235 assertEquals([ [ "a", 1 ] ], Object.entries(aAddsB)); | |
| 236 | |
| 237 var aMakesBEnumerable = {}; | |
| 238 Object.defineProperty(aMakesBEnumerable, "a", { | |
| 239 get() { | |
| 240 Object.defineProperty(this, "b", { enumerable: true }); | |
| 241 return 1; | |
| 242 }, | |
| 243 enumerable: true | |
| 244 }); | |
| 245 Object.defineProperty(aMakesBEnumerable, "b", { | |
| 246 value: 2, configurable:true, enumerable: false }); | |
| 247 assertEquals([ [ "a", 1 ], [ "b", 2 ] ], Object.entries(aMakesBEnumerable)); | |
| 248 } | |
| 249 TestMutateDuringEnumeration(); | |
| 250 | |
| 251 | |
| 252 (function TestElementKinds() { | |
| 253 var O1 = { name: "1" }, O2 = { name: "2" }, O3 = { name: "3" }; | |
| 254 var PI = 3.141592653589793; | |
| 255 var E = 2.718281828459045; | |
| 256 function fastSloppyArguments(a, b, c) { | |
| 257 delete arguments[0]; | |
| 258 arguments[0] = a; | |
| 259 return arguments; | |
| 260 } | |
| 261 | |
| 262 function slowSloppyArguments(a, b, c) { | |
| 263 delete arguments[0]; | |
| 264 arguments[0] = a; | |
| 265 Object.defineProperties(arguments, { | |
| 266 0: { | |
| 267 enumerable: true, | |
| 268 value: a | |
| 269 }, | |
| 270 9999: { | |
| 271 enumerable: false, | |
| 272 value: "Y" | |
| 273 } | |
| 274 }); | |
| 275 arguments[10000] = "X"; | |
| 276 return arguments; | |
| 277 } | |
| 278 | |
| 279 var element_kinds = { | |
| 280 FAST_SMI_ELEMENTS: [ [1, 2, 3], [ ["0", 1], ["1", 2], ["2", 3] ] ], | |
| 281 FAST_HOLEY_SMI_ELEMENTS: [ [, , 3], [ ["2", 3] ] ], | |
| 282 FAST_ELEMENTS: [ [O1, O2, O3], [ ["0", O1], ["1", O2], ["2", O3] ] ], | |
| 283 FAST_HOLEY_ELEMENTS: [ [, , O3], [ ["2", O3] ] ], | |
| 284 FAST_DOUBLE_ELEMENTS: [ [E, NaN, PI], [ ["0", E], ["1", NaN], ["2", PI] ] ], | |
| 285 FAST_HOLEY_DOUBLE_ELEMENTS: [ [, , NaN], [ ["2", NaN] ] ], | |
| 286 | |
| 287 DICTIONARY_ELEMENTS: [ Object.defineProperties({ 10000: "world" }, { | |
| 288 100: { enumerable: true, value: "hello" }, | |
| 289 99: { enumerable: false, value: "nope" } | |
| 290 }), [ ["100", "hello"], ["10000", "world" ] ] ], | |
| 291 FAST_SLOPPY_ARGUMENTS_ELEMENTS: [ | |
| 292 fastSloppyArguments("a", "b", "c"), | |
| 293 [ ["0", "a"], ["1", "b"], ["2", "c"] ] ], | |
| 294 SLOW_SLOPPY_ARGUMENTS_ELEMENTS: [ | |
| 295 slowSloppyArguments("a", "b", "c"), | |
| 296 [ ["0", "a"], ["1", "b"], ["2", "c"], ["10000", "X"] ] ], | |
| 297 | |
| 298 FAST_STRING_WRAPPER_ELEMENTS: [ new String("str"), | |
| 299 [ ["0", "s"], ["1", "t"], ["2", "r"]] ], | |
| 300 SLOW_STRING_WRAPPER_ELEMENTS: [ | |
| 301 Object.defineProperties(new String("str"), { | |
| 302 10000: { enumerable: false, value: "X" }, | |
| 303 9999: { enumerable: true, value: "Y" } | |
| 304 }), [["0", "s"], ["1", "t"], ["2", "r"], ["9999", "Y"]] ], | |
| 305 }; | |
| 306 | |
| 307 for (let [kind, [object, expected]] of Object.entries(element_kinds)) { | |
| 308 let result1 = Object.entries(object); | |
| 309 assertEquals(expected, result1, `fast Object.entries() with ${kind}`); | |
| 310 | |
| 311 let proxy = new Proxy(object, {}); | |
| 312 let result2 = Object.entries(proxy); | |
| 313 assertEquals(result1, result2, `slow Object.entries() with ${kind}`); | |
| 314 } | |
| 315 })(); | |
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