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 // Flags: --harmony-default-parameters 6 7 8 (function TestDefaults() { 9 function f1(x = 1) { return x } 10 assertEquals(1, f1()); 11 assertEquals(1, f1(undefined)); 12 assertEquals(2, f1(2)); 13 assertEquals(null, f1(null)); 14 15 function f2(x, y = x) { return x + y; } 16 assertEquals(8, f2(4)); 17 assertEquals(8, f2(4, undefined)); 18 assertEquals(6, f2(4, 2)); 19 20 function f3(x = 1, y) { return x + y; } 21 assertEquals(8, f3(5, 3)); 22 assertEquals(3, f3(undefined, 2)); 23 assertEquals(6, f3(4, 2)); 24 25 function f4(x = () => 1) { return x() } 26 assertEquals(1, f4()); 27 assertEquals(1, f4(undefined)); 28 assertEquals(2, f4(() => 2)); 29 assertThrows(() => f4(null), TypeError); 30 31 function f5(x, y = () => x) { return x + y(); } 32 assertEquals(8, f5(4)); 33 assertEquals(8, f5(4, undefined)); 34 assertEquals(6, f5(4, () => 2)); 35 36 function f6(x = {a: 1, m() { return 2 }}) { return x.a + x.m(); } 37 assertEquals(3, f6()); 38 assertEquals(3, f6(undefined)); 39 assertEquals(5, f6({a: 2, m() { return 3 }})); 40 41 var g1 = (x = 1) => { return x }; 42 assertEquals(1, g1()); 43 assertEquals(1, g1(undefined)); 44 assertEquals(2, g1(2)); 45 assertEquals(null, g1(null)); 46 47 var g2 = (x, y = x) => { return x + y; }; 48 assertEquals(8, g2(4)); 49 assertEquals(8, g2(4, undefined)); 50 assertEquals(6, g2(4, 2)); 51 52 var g3 = (x = 1, y) => { return x + y; }; 53 assertEquals(8, g3(5, 3)); 54 assertEquals(3, g3(undefined, 2)); 55 assertEquals(6, g3(4, 2)); 56 57 var g4 = (x = () => 1) => { return x() }; 58 assertEquals(1, g4()); 59 assertEquals(1, g4(undefined)); 60 assertEquals(2, g4(() => 2)); 61 assertThrows(() => g4(null), TypeError); 62 63 var g5 = (x, y = () => x) => { return x + y(); }; 64 assertEquals(8, g5(4)); 65 assertEquals(8, g5(4, undefined)); 66 assertEquals(6, g5(4, () => 2)); 67 68 var g6 = (x = {a: 1, m() { return 2 }}) => { return x.a + x.m(); }; 69 assertEquals(3, g6()); 70 assertEquals(3, g6(undefined)); 71 assertEquals(5, g6({a: 2, m() { return 3 }})); 72 }()); 73 74 75 (function TestEvalInParameters() { 76 function f1(x = eval(0)) { return x } 77 assertEquals(0, f1()); 78 function f2(x = () => eval(1)) { return x() } 79 assertEquals(1, f2()); 80 })(); 81 82 83 (function TestParameterScopingSloppy() { 84 var x = 1; 85 86 function f1(a = x) { var x = 2; return a; } 87 assertEquals(1, f1()); 88 function f2(a = x) { function x() {}; return a; } 89 assertEquals(1, f2()); 90 function f3(a = eval("x")) { var x; return a; } 91 assertEquals(1, f3()); 92 function f31(a = eval("'use strict'; x")) { var x; return a; } 93 assertEquals(1, f31()); 94 function f4(a = function() { return x }) { var x; return a(); } 95 assertEquals(1, f4()); 96 function f5(a = () => x) { var x; return a(); } 97 assertEquals(1, f5()); 98 function f6(a = () => eval("x")) { var x; return a(); } 99 assertEquals(1, f6()); 100 function f61(a = () => { 'use strict'; return eval("x") }) { var x; return a(); } 101 assertEquals(1, f61()); 102 function f62(a = () => eval("'use strict'; x")) { var x; return a(); } 103 assertEquals(1, f62()); 104 105 var g1 = (a = x) => { var x = 2; return a; }; 106 assertEquals(1, g1()); 107 var g2 = (a = x) => { function x() {}; return a; }; 108 assertEquals(1, g2()); 109 var g3 = (a = eval("x")) => { var x; return a; }; 110 assertEquals(1, g3()); 111 var g31 = (a = eval("'use strict'; x")) => { var x; return a; }; 112 assertEquals(1, g31()); 113 var g4 = (a = function() { return x }) => { var x; return a(); }; 114 assertEquals(1, g4()); 115 var g5 = (a = () => x) => { var x; return a(); }; 116 assertEquals(1, g5()); 117 var g6 = (a = () => eval("x")) => { var x; return a(); }; 118 assertEquals(1, g6()); 119 var g61 = (a = () => { 'use strict'; return eval("x") }) => { var x; return a(); }; 120 assertEquals(1, g61()); 121 var g62 = (a = () => eval("'use strict'; x")) => { var x; return a(); }; 122 assertEquals(1, g62()); 123 124 var f11 = function f(x = f) { var f; return x; } 125 assertSame(f11, f11()); 126 var f12 = function f(x = f) { function f() {}; return x; } 127 assertSame(f12, f12()); 128 var f13 = function f(f = 7, x = f) { return x; } 129 assertSame(7, f13()); 130 131 var o1 = {f: function(x = this) { return x; }}; 132 assertSame(o1, o1.f()); 133 assertSame(1, o1.f(1)); 134 })(); 135 136 (function TestParameterScopingStrict() { 137 "use strict"; 138 var x = 1; 139 140 function f1(a = x) { let x = 2; return a; } 141 assertEquals(1, f1()); 142 function f2(a = x) { const x = 2; return a; } 143 assertEquals(1, f2()); 144 function f3(a = x) { function x() {}; return a; } 145 assertEquals(1, f3()); 146 function f4(a = eval("x")) { var x; return a; } 147 assertEquals(1, f4()); 148 function f5(a = () => eval("x")) { var x; return a(); } 149 assertEquals(1, f5()); 150 151 var g1 = (a = x) => { let x = 2; return a; }; 152 assertEquals(1, g1()); 153 var g2 = (a = x) => { const x = 2; return a; }; 154 assertEquals(1, g2()); 155 var g3 = (a = x) => { function x() {}; return a; }; 156 assertEquals(1, g3()); 157 var g4 = (a = eval("x")) => { var x; return a; }; 158 assertEquals(1, g4()); 159 var g5 = (a = () => eval("x")) => { var x; return a(); }; 160 assertEquals(1, g5()); 161 162 var f11 = function f(x = f) { let f; return x; } 163 assertSame(f11, f11()); 164 var f12 = function f(x = f) { const f = 0; return x; } 165 assertSame(f12, f12()); 166 var f13 = function f(x = f) { function f() {}; return x; } 167 assertSame(f13, f13()); 168 })(); 169 170 (function TestSloppyEvalScoping() { 171 var x = 1; 172 173 function f1(y = eval("var x = 2")) { with ({}) { return x; } } 174 assertEquals(1, f1()); 175 function f2(y = eval("var x = 2"), z = x) { return z; } 176 assertEquals(1, f2()); 177 assertEquals(1, f2(0)); 178 function f3(y = eval("var x = 2"), z = eval("x")) { return z; } 179 assertEquals(1, f3()); 180 assertEquals(1, f3(0)); 181 function f8(y = (eval("var x = 2"), x)) { return y; } 182 assertEquals(2, f8()); 183 assertEquals(0, f8(0)); 184 185 function f11(z = eval("var y = 2")) { return y; } 186 assertThrows(f11, ReferenceError); 187 function f12(z = eval("var y = 2"), b = y) {} 188 assertThrows(f12, ReferenceError); 189 function f13(z = eval("var y = 2"), b = eval("y")) {} 190 assertThrows(f13, ReferenceError); 191 192 function f21(f = () => x) { eval("var x = 2"); return f() } 193 assertEquals(1, f21()); 194 assertEquals(3, f21(() => 3)); 195 function f22(f = () => eval("x")) { eval("var x = 2"); return f() } 196 assertEquals(1, f22()); 197 assertEquals(3, f22(() => 3)); 198 199 var g1 = (y = eval("var x = 2")) => { with ({}) { return x; } }; 200 assertEquals(1, g1()); 201 var g2 = (y = eval("var x = 2"), z = x) => { return z; }; 202 assertEquals(1, g2()); 203 assertEquals(1, g2(0)); 204 var g3 = (y = eval("var x = 2"), z = eval("x")) => { return z; }; 205 assertEquals(1, g3()); 206 assertEquals(1, g3(0)); 207 var g8 = (y = (eval("var x = 2"), x)) => { return y; }; 208 assertEquals(2, g8()); 209 assertEquals(0, g8(0)); 210 211 var g11 = (z = eval("var y = 2")) => { return y; }; 212 assertThrows(g11, ReferenceError); 213 var g12 = (z = eval("var y = 2"), b = y) => {}; 214 assertThrows(g12, ReferenceError); 215 var g13 = (z = eval("var y = 2"), b = eval("y")) => {}; 216 assertThrows(g13, ReferenceError); 217 218 var g21 = (f = () => x) => { eval("var x = 2"); return f() }; 219 assertEquals(1, g21()); 220 assertEquals(3, g21(() => 3)); 221 var g22 = (f = () => eval("x")) => { eval("var x = 2"); return f() }; 222 assertEquals(1, g22()); 223 assertEquals(3, g22(() => 3)); 224 })(); 225 226 227 (function TestStrictEvalScoping() { 228 'use strict'; 229 var x = 1; 230 231 function f1(y = eval("var x = 2")) { return x; } 232 assertEquals(1, f1()); 233 function f2(y = eval("var x = 2"), z = x) { return z; } 234 assertEquals(1, f2()); 235 assertEquals(1, f2(0)); 236 function f3(y = eval("var x = 2"), z = eval("x")) { return z; } 237 assertEquals(1, f3()); 238 assertEquals(1, f3(0)); 239 function f8(y = (eval("var x = 2"), x)) { return y; } 240 assertEquals(1, f8()); 241 assertEquals(0, f8(0)); 242 243 function f11(z = eval("var y = 2")) { return y; } 244 assertThrows(f11, ReferenceError); 245 function f12(z = eval("var y = 2"), b = y) {} 246 assertThrows(f12, ReferenceError); 247 function f13(z = eval("var y = 2"), b = eval("y")) {} 248 assertThrows(f13, ReferenceError); 249 250 function f21(f = () => x) { eval("var x = 2"); return f() } 251 assertEquals(1, f21()); 252 assertEquals(3, f21(() => 3)); 253 function f22(f = () => eval("x")) { eval("var x = 2"); return f() } 254 assertEquals(1, f22()); 255 assertEquals(3, f22(() => 3)); 256 })(); 257 258 (function TestParameterTDZSloppy() { 259 function f1(a = x, x) { return a } 260 assertThrows(() => f1(undefined, 4), ReferenceError); 261 assertEquals(4, f1(4, 5)); 262 function f2(a = eval("x"), x) { return a } 263 assertThrows(() => f2(undefined, 4), ReferenceError); 264 assertEquals(4, f2(4, 5)); 265 function f3(a = eval("'use strict'; x"), x) { return a } 266 assertThrows(() => f3(undefined, 4), ReferenceError); 267 assertEquals(4, f3(4, 5)); 268 function f4(a = () => x, x) { return a() } 269 assertEquals(4, f4(() => 4, 5)); 270 function f5(a = () => eval("x"), x) { return a() } 271 assertEquals(4, f5(() => 4, 5)); 272 function f6(a = () => eval("'use strict'; x"), x) { return a() } 273 assertEquals(4, f6(() => 4, 5)); 274 275 function f11(a = x, x = 2) { return a } 276 assertThrows(() => f11(), ReferenceError); 277 assertThrows(() => f11(undefined), ReferenceError); 278 assertThrows(() => f11(undefined, 4), ReferenceError); 279 assertEquals(4, f1(4, 5)); 280 function f12(a = eval("x"), x = 2) { return a } 281 assertThrows(() => f12(), ReferenceError); 282 assertThrows(() => f12(undefined), ReferenceError); 283 assertThrows(() => f12(undefined, 4), ReferenceError); 284 assertEquals(4, f12(4, 5)); 285 function f13(a = eval("'use strict'; x"), x = 2) { return a } 286 assertThrows(() => f13(), ReferenceError); 287 assertThrows(() => f13(undefined), ReferenceError); 288 assertThrows(() => f13(undefined, 4), ReferenceError); 289 assertEquals(4, f13(4, 5)); 290 291 function f21(x = function() { return a }, ...a) { return x()[0] } 292 assertEquals(4, f21(undefined, 4)); 293 function f22(x = () => a, ...a) { return x()[0] } 294 assertEquals(4, f22(undefined, 4)); 295 function f23(x = () => eval("a"), ...a) { return x()[0] } 296 assertEquals(4, f23(undefined, 4)); 297 function f24(x = () => {'use strict'; return eval("a") }, ...a) { 298 return x()[0] 299 } 300 assertEquals(4, f24(undefined, 4)); 301 function f25(x = () => eval("'use strict'; a"), ...a) { return x()[0] } 302 assertEquals(4, f25(undefined, 4)); 303 304 var g1 = (x = function() { return a }, ...a) => { return x()[0] }; 305 assertEquals(4, g1(undefined, 4)); 306 var g2 = (x = () => a, ...a) => { return x()[0] }; 307 assertEquals(4, g2(undefined, 4)); 308 })(); 309 310 (function TestParameterTDZStrict() { 311 "use strict"; 312 313 function f1(a = eval("x"), x) { return a } 314 assertThrows(() => f1(undefined, 4), ReferenceError); 315 assertEquals(4, f1(4, 5)); 316 function f2(a = () => eval("x"), x) { return a() } 317 assertEquals(4, f2(() => 4, 5)); 318 319 function f11(a = eval("x"), x = 2) { return a } 320 assertThrows(() => f11(), ReferenceError); 321 assertThrows(() => f11(undefined), ReferenceError); 322 assertThrows(() => f11(undefined, 4), ReferenceError); 323 assertEquals(4, f11(4, 5)); 324 325 function f21(x = () => eval("a"), ...a) { return x()[0] } 326 assertEquals(4, f21(undefined, 4)); 327 })(); 328 329 (function TestArgumentsForNonSimpleParameters() { 330 function f1(x = 900) { arguments[0] = 1; return x } 331 assertEquals(9, f1(9)); 332 assertEquals(900, f1()); 333 function f2(x = 1001) { x = 2; return arguments[0] } 334 assertEquals(10, f2(10)); 335 assertEquals(undefined, f2()); 336 }()); 337 338 339 (function TestFunctionLength() { 340 assertEquals(0, (function(x = 1) {}).length); 341 assertEquals(0, (function(x = 1, ...a) {}).length); 342 assertEquals(1, (function(x, y = 1) {}).length); 343 assertEquals(1, (function(x, y = 1, ...a) {}).length); 344 assertEquals(2, (function(x, y, z = 1) {}).length); 345 assertEquals(2, (function(x, y, z = 1, ...a) {}).length); 346 assertEquals(1, (function(x, y = 1, z) {}).length); 347 assertEquals(1, (function(x, y = 1, z, ...a) {}).length); 348 assertEquals(1, (function(x, y = 1, z, v = 2) {}).length); 349 assertEquals(1, (function(x, y = 1, z, v = 2, ...a) {}).length); 350 })(); 351 352 (function TestDirectiveThrows() { 353 "use strict"; 354 355 assertThrows(function(){ eval("function(x=1){'use strict';}") }, SyntaxError); 356 assertThrows(function(){ eval("(x=1) => {'use strict';}") }, SyntaxError); 357 assertThrows( 358 function(){ eval("(class{foo(x=1) {'use strict';}});") }, SyntaxError); 359 360 assertThrows( 361 function(){ eval("function(a, x=1){'use strict';}") }, SyntaxError); 362 assertThrows(function(){ eval("(a, x=1) => {'use strict';}") }, SyntaxError); 363 assertThrows( 364 function(){ eval("(class{foo(a, x=1) {'use strict';}});") }, SyntaxError); 365 })(); 366
