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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-exponentiation-operator --harmony-proxies |
| 6 |
| 7 function TestBasic() { |
| 8 assertEquals(-(8 ** 2), -64); |
| 9 assertEquals(+(8 ** 2), 64); |
| 10 assertEquals(~(8 ** 2), -65); |
| 11 assertEquals(!(8 ** 2), false); |
| 12 |
| 13 assertEquals(2 ** -2, 0.25); |
| 14 |
| 15 var o = { p: 1 }; |
| 16 assertEquals(2 ** delete o.p, 2); |
| 17 |
| 18 assertEquals(2 ** void 1, NaN); |
| 19 |
| 20 assertEquals(2 ** typeof 1, NaN); |
| 21 |
| 22 var s = "2"; |
| 23 var n = 2; |
| 24 |
| 25 assertEquals(2 ** "2", 4); |
| 26 assertEquals(2 ** +"2", 4); |
| 27 assertEquals(2 ** +s, 4); |
| 28 assertEquals(2 ** s, 4); |
| 29 assertEquals(2 ** 2, 4); |
| 30 assertEquals(2 ** +2, 4); |
| 31 assertEquals(2 ** +n, 4); |
| 32 assertEquals(2 ** n, 4); |
| 33 |
| 34 assertEquals(2 ** -"2", 0.25); |
| 35 assertEquals(2 ** -s, 0.25); |
| 36 assertEquals(2 ** -2, 0.25); |
| 37 assertEquals(2 ** -n, 0.25); |
| 38 |
| 39 assertEquals(2 ** ~"2", 0.125); |
| 40 assertEquals(2 ** ~s, 0.125); |
| 41 assertEquals(2 ** ~2, 0.125); |
| 42 assertEquals(2 ** ~n, 0.125); |
| 43 |
| 44 assertEquals(2 ** !"2", 1); |
| 45 assertEquals(2 ** !s, 1); |
| 46 assertEquals(2 ** !2, 1); |
| 47 assertEquals(2 ** !n, 1); |
| 48 |
| 49 var exponent = 2; |
| 50 assertEquals(2 ** 3, 8); |
| 51 assertEquals(3 * 2 ** 3, 24); |
| 52 assertEquals(2 ** ++exponent, 8); |
| 53 assertEquals(2 ** -1 * 2, 1); |
| 54 assertEquals(2 ** 2 * 4, 16); |
| 55 assertEquals(2 ** 2 / 2, 2); |
| 56 assertEquals(2 ** (3 ** 2), 512); |
| 57 assertEquals(2 ** 3 ** 2, 512); |
| 58 assertEquals(2 * 3 ** 2, 18); |
| 59 assertEquals(16 / 2 ** 2, 4); |
| 60 } |
| 61 TestBasic(); |
| 62 |
| 63 |
| 64 function TestAssignment() { |
| 65 var base = -5; |
| 66 assertEquals(base **= 3, -125); |
| 67 assertEquals(base, -125); |
| 68 } |
| 69 TestAssignment(); |
| 70 |
| 71 |
| 72 function TestPrecedence() { |
| 73 var base = 4; |
| 74 assertEquals(--base ** 2, 9); // 3 ** 2 |
| 75 assertEquals(++base ** 2, 16); // 4 ** 2 |
| 76 assertEquals(base++ ** 2, 16); // 4 ** 2 |
| 77 assertEquals(base-- ** 2, 25); // 5 ** 2 |
| 78 |
| 79 assertEquals(4, base); |
| 80 assertEquals(--base ** --base ** 2, |
| 81 Math.pow(3, Math.pow(2, 2))); |
| 82 |
| 83 assertEquals(2, base); |
| 84 assertEquals(++base ** ++base ** 2, |
| 85 Math.pow(3, Math.pow(4, 2))); |
| 86 |
| 87 base = 4; |
| 88 assertEquals(base-- ** base-- ** 2, |
| 89 Math.pow(4, Math.pow(3, 2))); |
| 90 |
| 91 assertEquals(2, base); |
| 92 assertEquals(base++ ** base++ ** 2, |
| 93 Math.pow(2, Math.pow(3, 2))); |
| 94 } |
| 95 TestPrecedence(); |
| 96 |
| 97 |
| 98 function TestInvariants() { |
| 99 assertEquals(NaN, 2 ** NaN); |
| 100 assertEquals(NaN, (+0) ** NaN); |
| 101 assertEquals(NaN, (-0) ** NaN); |
| 102 assertEquals(NaN, Infinity ** NaN); |
| 103 assertEquals(NaN, (-Infinity) ** NaN); |
| 104 |
| 105 assertEquals(1, NaN ** +0); |
| 106 assertEquals(1, NaN ** -0); |
| 107 |
| 108 assertEquals(NaN, NaN ** NaN); |
| 109 assertEquals(NaN, NaN ** 2.2); |
| 110 assertEquals(NaN, NaN ** 1); |
| 111 assertEquals(NaN, NaN ** -1); |
| 112 assertEquals(NaN, NaN ** -2.2); |
| 113 assertEquals(NaN, NaN ** Infinity); |
| 114 assertEquals(NaN, NaN ** -Infinity); |
| 115 |
| 116 assertEquals(Infinity, 1.1 ** Infinity); |
| 117 assertEquals(Infinity, (-1.1) ** Infinity); |
| 118 assertEquals(Infinity, 2 ** Infinity); |
| 119 assertEquals(Infinity, (-2) ** Infinity); |
| 120 |
| 121 // Because +0 == -0, we need to compare 1/{+,-}0 to {+,-}Infinity |
| 122 assertEquals(+Infinity, 1/1.1 ** -Infinity); |
| 123 assertEquals(+Infinity, 1/(-1.1) ** -Infinity); |
| 124 assertEquals(+Infinity, 1/2 ** -Infinity); |
| 125 assertEquals(+Infinity, 1/(-2) ** -Infinity); |
| 126 |
| 127 assertEquals(NaN, 1 ** Infinity); |
| 128 assertEquals(NaN, 1 ** -Infinity); |
| 129 assertEquals(NaN, (-1) ** Infinity); |
| 130 assertEquals(NaN, (-1) ** -Infinity); |
| 131 |
| 132 assertEquals(+0, 0.1 ** Infinity); |
| 133 assertEquals(+0, (-0.1) ** Infinity); |
| 134 assertEquals(+0, 0.999 ** Infinity); |
| 135 assertEquals(+0, (-0.999) ** Infinity); |
| 136 |
| 137 assertEquals(Infinity, 0.1 ** -Infinity); |
| 138 assertEquals(Infinity, (-0.1) ** -Infinity); |
| 139 assertEquals(Infinity, 0.999 ** -Infinity); |
| 140 assertEquals(Infinity, (-0.999) ** -Infinity); |
| 141 |
| 142 assertEquals(Infinity, Infinity ** 0.1); |
| 143 assertEquals(Infinity, Infinity ** 2); |
| 144 |
| 145 assertEquals(+Infinity, 1/Infinity ** -0.1); |
| 146 assertEquals(+Infinity, 1/Infinity ** -2); |
| 147 |
| 148 assertEquals(-Infinity, (-Infinity) ** 3); |
| 149 assertEquals(-Infinity, (-Infinity) ** 13); |
| 150 |
| 151 assertEquals(Infinity, (-Infinity) ** 3.1); |
| 152 assertEquals(Infinity, (-Infinity) ** 2); |
| 153 |
| 154 assertEquals(-Infinity, 1/(-Infinity) ** -3); |
| 155 assertEquals(-Infinity, 1/(-Infinity) ** -13); |
| 156 |
| 157 assertEquals(+Infinity, 1/(-Infinity) ** -3.1); |
| 158 assertEquals(+Infinity, 1/(-Infinity) ** -2); |
| 159 |
| 160 assertEquals(+Infinity, 1/(+0) ** 1.1); |
| 161 assertEquals(+Infinity, 1/(+0) ** 2); |
| 162 |
| 163 assertEquals(Infinity, (+0) ** -1.1); |
| 164 assertEquals(Infinity, (+0) ** -2); |
| 165 |
| 166 assertEquals(-Infinity, 1/(-0) ** 3); |
| 167 assertEquals(-Infinity, 1/(-0) ** 13); |
| 168 |
| 169 assertEquals(+Infinity, 1/(-0) ** 3.1); |
| 170 assertEquals(+Infinity, 1/(-0) ** 2); |
| 171 |
| 172 assertEquals(-Infinity, (-0) ** -3); |
| 173 assertEquals(-Infinity, (-0) ** -13); |
| 174 |
| 175 assertEquals(Infinity, (-0) ** -3.1); |
| 176 assertEquals(Infinity, (-0) ** -2); |
| 177 |
| 178 assertEquals(NaN, (-0.00001) ** 1.1); |
| 179 assertEquals(NaN, (-0.00001) ** -1.1); |
| 180 assertEquals(NaN, (-1.1) ** 1.1); |
| 181 assertEquals(NaN, (-1.1) ** -1.1); |
| 182 assertEquals(NaN, (-2) ** 1.1); |
| 183 assertEquals(NaN, (-2) ** -1.1); |
| 184 assertEquals(NaN, (-1000) ** 1.1); |
| 185 assertEquals(NaN, (-1000) ** -1.1); |
| 186 |
| 187 assertEquals(+Infinity, 1/(-0) ** 0.5); |
| 188 assertEquals(+Infinity, 1/(-0) ** 0.6); |
| 189 assertEquals(-Infinity, 1/(-0) ** 1); |
| 190 assertEquals(-Infinity, 1/(-0) ** 10000000001); |
| 191 |
| 192 assertEquals(+Infinity, (-0) ** -0.5); |
| 193 assertEquals(+Infinity, (-0) ** -0.6); |
| 194 assertEquals(-Infinity, (-0) ** -1); |
| 195 assertEquals(-Infinity, (-0) ** -10000000001); |
| 196 |
| 197 assertEquals(4, 16 ** 0.5); |
| 198 assertEquals(NaN, (-16) ** 0.5); |
| 199 assertEquals(0.25, 16 ** -0.5); |
| 200 assertEquals(NaN, (-16) ** -0.5); |
| 201 } |
| 202 TestInvariants(); |
| 203 |
| 204 |
| 205 function TestOperationOrder() { |
| 206 var log = []; |
| 207 var handler = { |
| 208 get(t, n) { |
| 209 var result = Reflect.get(t, n); |
| 210 var str = typeof result === "object" ? "[object Object]" : String(result); |
| 211 log.push(`[[Get]](${String(n)}) -> ${str}`); |
| 212 return result; |
| 213 }, |
| 214 set(t, n, v) { |
| 215 var result = Reflect.set(t, n, v); |
| 216 log.push(`[[Set]](${String(n)}, ${String(v)}) -> ${String(result)}`); |
| 217 return result; |
| 218 }, |
| 219 has() { assertUnreachable("trap 'has' invoked"); }, |
| 220 deleteProperty() { assertUnreachable("trap 'deleteProperty' invoked"); }, |
| 221 ownKeys() { assertUnreachable("trap 'ownKeys' invoked"); }, |
| 222 apply() { assertUnreachable("trap 'apply' invoked"); }, |
| 223 construct() { assertUnreachable("trap 'construct' invoked"); }, |
| 224 getPrototypeOf() { assertUnreachable("trap 'getPrototypeOf' invoked"); }, |
| 225 setPrototypeOf() { assertUnreachable("trap 'setPrototypeOf' invoked"); }, |
| 226 isExtensible() { assertUnreachable("trap 'isExtensible' invoked"); }, |
| 227 preventExtensions() { |
| 228 assertUnreachable("trap 'preventExtensions' invoked"); }, |
| 229 getOwnPropertyDescriptor() { |
| 230 assertUnreachable("trap 'getOwnPropertyDescriptor' invoked"); }, |
| 231 defineProperty() { assertUnreachable("trap 'defineProperty' invoked"); }, |
| 232 }; |
| 233 var P = new Proxy({ x: 2 }, handler); |
| 234 |
| 235 assertEquals(256, P.x **= "8"); |
| 236 assertEquals([ |
| 237 "[[Get]](x) -> 2", |
| 238 "[[Set]](x, 256) -> true" |
| 239 ], log); |
| 240 |
| 241 log = []; |
| 242 var O = new Proxy({ p: P }, handler); |
| 243 assertEquals(65536, O.p.x **= 2 ); |
| 244 assertEquals([ |
| 245 "[[Get]](p) -> [object Object]", |
| 246 "[[Get]](x) -> 256", |
| 247 "[[Set]](x, 65536) -> true" |
| 248 ], log); |
| 249 } |
| 250 TestOperationOrder(); |
| 251 |
| 252 |
| 253 function TestOverrideMathPow() { |
| 254 var MathPow = MathPow; |
| 255 Math.pow = function(a, b) { |
| 256 assertUnreachable(`Math.pow(${String(a)}, ${String(b)}) invoked`); |
| 257 } |
| 258 |
| 259 TestBasic(); |
| 260 TestAssignment(); |
| 261 TestInvariants(); |
| 262 TestOperationOrder(); |
| 263 |
| 264 Math.pow = MathPow; |
| 265 } |
| 266 TestOverrideMathPow(); |
| 267 |
| 268 function TestBadAssignmentLHS() { |
| 269 assertThrows("if (false) { 17 **= 10; }", ReferenceError); |
| 270 assertThrows("if (false) { '17' **= 10; }", ReferenceError); |
| 271 assertThrows("if (false) { /17/ **= 10; }", ReferenceError); |
| 272 assertThrows("if (false) { ({ valueOf() { return 17; } } **= 10); }", |
| 273 ReferenceError); |
| 274 // TODO(caitp): a Call expression as LHS should be an early ReferenceError! |
| 275 // assertThrows("if (false) { Array() **= 10; }", ReferenceError); |
| 276 assertThrows(() => Array() **= 10, ReferenceError); |
| 277 } |
| 278 TestBadAssignmentLHS(); |
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