1// Copyright 2015 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 6(function TestDefaults() { 7 function f1(x = 1) { return x } 8 assertEquals(1, f1()); 9 assertEquals(1, f1(undefined)); 10 assertEquals(2, f1(2)); 11 assertEquals(null, f1(null)); 12 13 function f2(x, y = x) { return x + y; } 14 assertEquals(8, f2(4)); 15 assertEquals(8, f2(4, undefined)); 16 assertEquals(6, f2(4, 2)); 17 18 function f3(x = 1, y) { return x + y; } 19 assertEquals(8, f3(5, 3)); 20 assertEquals(3, f3(undefined, 2)); 21 assertEquals(6, f3(4, 2)); 22 23 function f4(x = () => 1) { return x() } 24 assertEquals(1, f4()); 25 assertEquals(1, f4(undefined)); 26 assertEquals(2, f4(() => 2)); 27 assertThrows(() => f4(null), TypeError); 28 29 function f5(x, y = () => x) { return x + y(); } 30 assertEquals(8, f5(4)); 31 assertEquals(8, f5(4, undefined)); 32 assertEquals(6, f5(4, () => 2)); 33 34 function f6(x = {a: 1, m() { return 2 }}) { return x.a + x.m(); } 35 assertEquals(3, f6()); 36 assertEquals(3, f6(undefined)); 37 assertEquals(5, f6({a: 2, m() { return 3 }})); 38 39 var g1 = (x = 1) => { return x }; 40 assertEquals(1, g1()); 41 assertEquals(1, g1(undefined)); 42 assertEquals(2, g1(2)); 43 assertEquals(null, g1(null)); 44 45 var g2 = (x, y = x) => { return x + y; }; 46 assertEquals(8, g2(4)); 47 assertEquals(8, g2(4, undefined)); 48 assertEquals(6, g2(4, 2)); 49 50 var g3 = (x = 1, y) => { return x + y; }; 51 assertEquals(8, g3(5, 3)); 52 assertEquals(3, g3(undefined, 2)); 53 assertEquals(6, g3(4, 2)); 54 55 var g4 = (x = () => 1) => { return x() }; 56 assertEquals(1, g4()); 57 assertEquals(1, g4(undefined)); 58 assertEquals(2, g4(() => 2)); 59 assertThrows(() => g4(null), TypeError); 60 61 var g5 = (x, y = () => x) => { return x + y(); }; 62 assertEquals(8, g5(4)); 63 assertEquals(8, g5(4, undefined)); 64 assertEquals(6, g5(4, () => 2)); 65 66 var g6 = (x = {a: 1, m() { return 2 }}) => { return x.a + x.m(); }; 67 assertEquals(3, g6()); 68 assertEquals(3, g6(undefined)); 69 assertEquals(5, g6({a: 2, m() { return 3 }})); 70}()); 71 72 73(function TestEvalInParameters() { 74 function f1(x = eval(0)) { return x } 75 assertEquals(0, f1()); 76 function f2(x = () => eval(1)) { return x() } 77 assertEquals(1, f2()); 78})(); 79 80 81(function TestParameterScopingSloppy() { 82 var x = 1; 83 84 function f1(a = x) { var x = 2; return a; } 85 assertEquals(1, f1()); 86 function f2(a = x) { function x() {}; return a; } 87 assertEquals(1, f2()); 88 function f3(a = eval("x")) { var x; return a; } 89 assertEquals(1, f3()); 90 function f31(a = eval("'use strict'; x")) { var x; return a; } 91 assertEquals(1, f31()); 92 function f4(a = function() { return x }) { var x; return a(); } 93 assertEquals(1, f4()); 94 function f5(a = () => x) { var x; return a(); } 95 assertEquals(1, f5()); 96 function f6(a = () => eval("x")) { var x; return a(); } 97 assertEquals(1, f6()); 98 function f61(a = () => { 'use strict'; return eval("x") }) { var x; return a(); } 99 assertEquals(1, f61()); 100 function f62(a = () => eval("'use strict'; x")) { var x; return a(); } 101 assertEquals(1, f62()); 102 103 var g1 = (a = x) => { var x = 2; return a; }; 104 assertEquals(1, g1()); 105 var g2 = (a = x) => { function x() {}; return a; }; 106 assertEquals(1, g2()); 107 var g3 = (a = eval("x")) => { var x; return a; }; 108 assertEquals(1, g3()); 109 var g31 = (a = eval("'use strict'; x")) => { var x; return a; }; 110 assertEquals(1, g31()); 111 var g4 = (a = function() { return x }) => { var x; return a(); }; 112 assertEquals(1, g4()); 113 var g5 = (a = () => x) => { var x; return a(); }; 114 assertEquals(1, g5()); 115 var g6 = (a = () => eval("x")) => { var x; return a(); }; 116 assertEquals(1, g6()); 117 var g61 = (a = () => { 'use strict'; return eval("x") }) => { var x; return a(); }; 118 assertEquals(1, g61()); 119 var g62 = (a = () => eval("'use strict'; x")) => { var x; return a(); }; 120 assertEquals(1, g62()); 121 122 var f11 = function f(x = f) { var f; return x; } 123 assertSame(f11, f11()); 124 var f12 = function f(x = f) { function f() {}; return x; } 125 assertSame(f12, f12()); 126 var f13 = function f(f = 7, x = f) { return x; } 127 assertSame(7, f13()); 128 129 var o1 = {f: function(x = this) { return x; }}; 130 assertSame(o1, o1.f()); 131 assertSame(1, o1.f(1)); 132})(); 133 134(function TestParameterScopingStrict() { 135 "use strict"; 136 var x = 1; 137 138 function f1(a = x) { let x = 2; return a; } 139 assertEquals(1, f1()); 140 function f2(a = x) { const x = 2; return a; } 141 assertEquals(1, f2()); 142 function f3(a = x) { function x() {}; return a; } 143 assertEquals(1, f3()); 144 function f4(a = eval("x")) { var x; return a; } 145 assertEquals(1, f4()); 146 function f5(a = () => eval("x")) { var x; return a(); } 147 assertEquals(1, f5()); 148 149 var g1 = (a = x) => { let x = 2; return a; }; 150 assertEquals(1, g1()); 151 var g2 = (a = x) => { const x = 2; return a; }; 152 assertEquals(1, g2()); 153 var g3 = (a = x) => { function x() {}; return a; }; 154 assertEquals(1, g3()); 155 var g4 = (a = eval("x")) => { var x; return a; }; 156 assertEquals(1, g4()); 157 var g5 = (a = () => eval("x")) => { var x; return a(); }; 158 assertEquals(1, g5()); 159 160 var f11 = function f(x = f) { let f; return x; } 161 assertSame(f11, f11()); 162 var f12 = function f(x = f) { const f = 0; return x; } 163 assertSame(f12, f12()); 164 var f13 = function f(x = f) { function f() {}; return x; } 165 assertSame(f13, f13()); 166})(); 167 168(function TestSloppyEvalScoping() { 169 var x = 1; 170 171 function f1(y = eval("var x = 2")) { with ({}) { return x; } } 172 assertEquals(1, f1()); 173 function f2(y = eval("var x = 2"), z = x) { return z; } 174 assertEquals(1, f2()); 175 assertEquals(1, f2(0)); 176 function f3(y = eval("var x = 2"), z = eval("x")) { return z; } 177 assertEquals(1, f3()); 178 assertEquals(1, f3(0)); 179 function f8(y = (eval("var x = 2"), x)) { return y; } 180 assertEquals(2, f8()); 181 assertEquals(0, f8(0)); 182 183 function f11(z = eval("var y = 2")) { return y; } 184 assertThrows(f11, ReferenceError); 185 function f12(z = eval("var y = 2"), b = y) {} 186 assertThrows(f12, ReferenceError); 187 function f13(z = eval("var y = 2"), b = eval("y")) {} 188 assertThrows(f13, ReferenceError); 189 190 function f21(f = () => x) { eval("var x = 2"); return f() } 191 assertEquals(1, f21()); 192 assertEquals(3, f21(() => 3)); 193 function f22(f = () => eval("x")) { eval("var x = 2"); return f() } 194 assertEquals(1, f22()); 195 assertEquals(3, f22(() => 3)); 196 197 var g1 = (y = eval("var x = 2")) => { with ({}) { return x; } }; 198 assertEquals(1, g1()); 199 var g2 = (y = eval("var x = 2"), z = x) => { return z; }; 200 assertEquals(1, g2()); 201 assertEquals(1, g2(0)); 202 var g3 = (y = eval("var x = 2"), z = eval("x")) => { return z; }; 203 assertEquals(1, g3()); 204 assertEquals(1, g3(0)); 205 var g8 = (y = (eval("var x = 2"), x)) => { return y; }; 206 assertEquals(2, g8()); 207 assertEquals(0, g8(0)); 208 209 var g11 = (z = eval("var y = 2")) => { return y; }; 210 assertThrows(g11, ReferenceError); 211 var g12 = (z = eval("var y = 2"), b = y) => {}; 212 assertThrows(g12, ReferenceError); 213 var g13 = (z = eval("var y = 2"), b = eval("y")) => {}; 214 assertThrows(g13, ReferenceError); 215 216 var g21 = (f = () => x) => { eval("var x = 2"); return f() }; 217 assertEquals(1, g21()); 218 assertEquals(3, g21(() => 3)); 219 var g22 = (f = () => eval("x")) => { eval("var x = 2"); return f() }; 220 assertEquals(1, g22()); 221 assertEquals(3, g22(() => 3)); 222})(); 223 224 225(function TestStrictEvalScoping() { 226 'use strict'; 227 var x = 1; 228 229 function f1(y = eval("var x = 2")) { return x; } 230 assertEquals(1, f1()); 231 function f2(y = eval("var x = 2"), z = x) { return z; } 232 assertEquals(1, f2()); 233 assertEquals(1, f2(0)); 234 function f3(y = eval("var x = 2"), z = eval("x")) { return z; } 235 assertEquals(1, f3()); 236 assertEquals(1, f3(0)); 237 function f8(y = (eval("var x = 2"), x)) { return y; } 238 assertEquals(1, f8()); 239 assertEquals(0, f8(0)); 240 241 function f11(z = eval("var y = 2")) { return y; } 242 assertThrows(f11, ReferenceError); 243 function f12(z = eval("var y = 2"), b = y) {} 244 assertThrows(f12, ReferenceError); 245 function f13(z = eval("var y = 2"), b = eval("y")) {} 246 assertThrows(f13, ReferenceError); 247 248 function f21(f = () => x) { eval("var x = 2"); return f() } 249 assertEquals(1, f21()); 250 assertEquals(3, f21(() => 3)); 251 function f22(f = () => eval("x")) { eval("var x = 2"); return f() } 252 assertEquals(1, f22()); 253 assertEquals(3, f22(() => 3)); 254})(); 255 256(function TestParameterTDZSloppy() { 257 function f1(a = x, x) { return a } 258 assertThrows(() => f1(undefined, 4), ReferenceError); 259 assertEquals(4, f1(4, 5)); 260 function f2(a = eval("x"), x) { return a } 261 assertThrows(() => f2(undefined, 4), ReferenceError); 262 assertEquals(4, f2(4, 5)); 263 function f3(a = eval("'use strict'; x"), x) { return a } 264 assertThrows(() => f3(undefined, 4), ReferenceError); 265 assertEquals(4, f3(4, 5)); 266 function f4(a = () => x, x) { return a() } 267 assertEquals(4, f4(() => 4, 5)); 268 function f5(a = () => eval("x"), x) { return a() } 269 assertEquals(4, f5(() => 4, 5)); 270 function f6(a = () => eval("'use strict'; x"), x) { return a() } 271 assertEquals(4, f6(() => 4, 5)); 272 273 function f11(a = x, x = 2) { return a } 274 assertThrows(() => f11(), ReferenceError); 275 assertThrows(() => f11(undefined), ReferenceError); 276 assertThrows(() => f11(undefined, 4), ReferenceError); 277 assertEquals(4, f1(4, 5)); 278 function f12(a = eval("x"), x = 2) { return a } 279 assertThrows(() => f12(), ReferenceError); 280 assertThrows(() => f12(undefined), ReferenceError); 281 assertThrows(() => f12(undefined, 4), ReferenceError); 282 assertEquals(4, f12(4, 5)); 283 function f13(a = eval("'use strict'; x"), x = 2) { return a } 284 assertThrows(() => f13(), ReferenceError); 285 assertThrows(() => f13(undefined), ReferenceError); 286 assertThrows(() => f13(undefined, 4), ReferenceError); 287 assertEquals(4, f13(4, 5)); 288 289 function f21(x = function() { return a }, ...a) { return x()[0] } 290 assertEquals(4, f21(undefined, 4)); 291 function f22(x = () => a, ...a) { return x()[0] } 292 assertEquals(4, f22(undefined, 4)); 293 function f23(x = () => eval("a"), ...a) { return x()[0] } 294 assertEquals(4, f23(undefined, 4)); 295 function f24(x = () => {'use strict'; return eval("a") }, ...a) { 296 return x()[0] 297 } 298 assertEquals(4, f24(undefined, 4)); 299 function f25(x = () => eval("'use strict'; a"), ...a) { return x()[0] } 300 assertEquals(4, f25(undefined, 4)); 301 302 var g1 = (x = function() { return a }, ...a) => { return x()[0] }; 303 assertEquals(4, g1(undefined, 4)); 304 var g2 = (x = () => a, ...a) => { return x()[0] }; 305 assertEquals(4, g2(undefined, 4)); 306})(); 307 308(function TestParameterTDZStrict() { 309 "use strict"; 310 311 function f1(a = eval("x"), x) { return a } 312 assertThrows(() => f1(undefined, 4), ReferenceError); 313 assertEquals(4, f1(4, 5)); 314 function f2(a = () => eval("x"), x) { return a() } 315 assertEquals(4, f2(() => 4, 5)); 316 317 function f11(a = eval("x"), x = 2) { return a } 318 assertThrows(() => f11(), ReferenceError); 319 assertThrows(() => f11(undefined), ReferenceError); 320 assertThrows(() => f11(undefined, 4), ReferenceError); 321 assertEquals(4, f11(4, 5)); 322 323 function f21(x = () => eval("a"), ...a) { return x()[0] } 324 assertEquals(4, f21(undefined, 4)); 325})(); 326 327(function TestArgumentsForNonSimpleParameters() { 328 function f1(x = 900) { arguments[0] = 1; return x } 329 assertEquals(9, f1(9)); 330 assertEquals(900, f1()); 331 function f2(x = 1001) { x = 2; return arguments[0] } 332 assertEquals(10, f2(10)); 333 assertEquals(undefined, f2()); 334}()); 335 336 337(function TestFunctionLength() { 338 assertEquals(0, (function(x = 1) {}).length); 339 assertEquals(0, (function(x = 1, ...a) {}).length); 340 assertEquals(1, (function(x, y = 1) {}).length); 341 assertEquals(1, (function(x, y = 1, ...a) {}).length); 342 assertEquals(2, (function(x, y, z = 1) {}).length); 343 assertEquals(2, (function(x, y, z = 1, ...a) {}).length); 344 assertEquals(1, (function(x, y = 1, z) {}).length); 345 assertEquals(1, (function(x, y = 1, z, ...a) {}).length); 346 assertEquals(1, (function(x, y = 1, z, v = 2) {}).length); 347 assertEquals(1, (function(x, y = 1, z, v = 2, ...a) {}).length); 348})(); 349 350(function TestDirectiveThrows() { 351 "use strict"; 352 353 assertThrows(function(){ eval("function(x=1){'use strict';}") }, SyntaxError); 354 assertThrows(function(){ eval("(x=1) => {'use strict';}") }, SyntaxError); 355 assertThrows( 356 function(){ eval("(class{foo(x=1) {'use strict';}});") }, SyntaxError); 357 358 assertThrows( 359 function(){ eval("function(a, x=1){'use strict';}") }, SyntaxError); 360 assertThrows(function(){ eval("(a, x=1) => {'use strict';}") }, SyntaxError); 361 assertThrows( 362 function(){ eval("(class{foo(a, x=1) {'use strict';}});") }, SyntaxError); 363})(); 364