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| 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 --harmony-arrow-functions |
| 6 // Flags: --harmony-rest-parameters |
| 7 |
| 8 |
| 9 (function TestDefaults() { |
| 10 function f1(x = 1) { return x } |
| 11 assertEquals(1, f1()); |
| 12 assertEquals(1, f1(undefined)); |
| 13 assertEquals(2, f1(2)); |
| 14 assertEquals(null, f1(null)); |
| 15 |
| 16 function f2(x, y = x) { return x + y; } |
| 17 assertEquals(8, f2(4)); |
| 18 assertEquals(8, f2(4, undefined)); |
| 19 assertEquals(6, f2(4, 2)); |
| 20 |
| 21 function f3(x = 1, y) { return x + y; } |
| 22 assertEquals(8, f3(5, 3)); |
| 23 assertEquals(3, f3(undefined, 2)); |
| 24 assertEquals(6, f3(4, 2)); |
| 25 |
| 26 function f4(x = () => 1) { return x() } |
| 27 assertEquals(1, f4()); |
| 28 assertEquals(1, f4(undefined)); |
| 29 assertEquals(2, f4(() => 2)); |
| 30 assertThrows(() => f4(null), TypeError); |
| 31 |
| 32 function f5(x, y = () => x) { return x + y(); } |
| 33 assertEquals(8, f5(4)); |
| 34 assertEquals(8, f5(4, undefined)); |
| 35 assertEquals(6, f5(4, () => 2)); |
| 36 |
| 37 function f6(x = {a: 1, m() { return 2 }}) { return x.a + x.m(); } |
| 38 assertEquals(3, f6()); |
| 39 assertEquals(3, f6(undefined)); |
| 40 assertEquals(5, f6({a: 2, m() { return 3 }})); |
| 41 |
| 42 var g1 = (x = 1) => { return x }; |
| 43 assertEquals(1, g1()); |
| 44 assertEquals(1, g1(undefined)); |
| 45 assertEquals(2, g1(2)); |
| 46 assertEquals(null, g1(null)); |
| 47 |
| 48 var g2 = (x, y = x) => { return x + y; }; |
| 49 assertEquals(8, g2(4)); |
| 50 assertEquals(8, g2(4, undefined)); |
| 51 assertEquals(6, g2(4, 2)); |
| 52 |
| 53 var g3 = (x = 1, y) => { return x + y; }; |
| 54 assertEquals(8, g3(5, 3)); |
| 55 assertEquals(3, g3(undefined, 2)); |
| 56 assertEquals(6, g3(4, 2)); |
| 57 |
| 58 var g4 = (x = () => 1) => { return x() }; |
| 59 assertEquals(1, g4()); |
| 60 assertEquals(1, g4(undefined)); |
| 61 assertEquals(2, g4(() => 2)); |
| 62 assertThrows(() => g4(null), TypeError); |
| 63 |
| 64 var g5 = (x, y = () => x) => { return x + y(); }; |
| 65 assertEquals(8, g5(4)); |
| 66 assertEquals(8, g5(4, undefined)); |
| 67 assertEquals(6, g5(4, () => 2)); |
| 68 |
| 69 var g6 = (x = {a: 1, m() { return 2 }}) => { return x.a + x.m(); }; |
| 70 assertEquals(3, g6()); |
| 71 assertEquals(3, g6(undefined)); |
| 72 assertEquals(5, g6({a: 2, m() { return 3 }})); |
| 73 }()); |
| 74 |
| 75 |
| 76 (function TestEvalInParameters() { |
| 77 function f1(x = eval(0)) { return x } |
| 78 assertEquals(0, f1()); |
| 79 function f2(x = () => eval(1)) { return x() } |
| 80 assertEquals(1, f2()); |
| 81 })(); |
| 82 |
| 83 |
| 84 (function TestParameterScoping() { |
| 85 // TODO(rossberg): Add checks for variable declarations in defaults. |
| 86 var x = 1; |
| 87 |
| 88 function f1(a = x) { var x = 2; return a; } |
| 89 assertEquals(1, f1()); |
| 90 function f2(a = x) { function x() {}; return a; } |
| 91 assertEquals(1, f2()); |
| 92 function f3(a = x) { 'use strict'; let x = 2; return a; } |
| 93 assertEquals(1, f3()); |
| 94 function f4(a = x) { 'use strict'; const x = 2; return a; } |
| 95 assertEquals(1, f4()); |
| 96 function f5(a = x) { 'use strict'; function 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 = eval("x")) { 'use strict'; 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 function f7(a = function() { return x }) { var x; return a(); } |
| 105 assertEquals(1, f7()); |
| 106 function f8(a = () => x) { var x; return a(); } |
| 107 assertEquals(1, f8()); |
| 108 function f9(a = () => eval("x")) { var x; return a(); } |
| 109 assertEquals(1, f9()); |
| 110 function f91(a = () => eval("x")) { 'use strict'; var x; return a(); } |
| 111 assertEquals(1, f91()); |
| 112 function f92(a = () => { 'use strict'; return eval("x") }) { var x; return a()
; } |
| 113 assertEquals(1, f92()); |
| 114 function f93(a = () => eval("'use strict'; x")) { var x; return a(); } |
| 115 assertEquals(1, f93()); |
| 116 |
| 117 var g1 = (a = x) => { var x = 2; return a; }; |
| 118 assertEquals(1, g1()); |
| 119 var g2 = (a = x) => { function x() {}; return a; }; |
| 120 assertEquals(1, g2()); |
| 121 var g3 = (a = x) => { 'use strict'; let x = 2; return a; }; |
| 122 assertEquals(1, g3()); |
| 123 var g4 = (a = x) => { 'use strict'; const x = 2; return a; }; |
| 124 assertEquals(1, g4()); |
| 125 var g5 = (a = x) => { 'use strict'; function x() {}; return a; }; |
| 126 assertEquals(1, g5()); |
| 127 var g6 = (a = eval("x")) => { var x; return a; }; |
| 128 assertEquals(1, g6()); |
| 129 var g61 = (a = eval("x")) => { 'use strict'; var x; return a; }; |
| 130 assertEquals(1, g61()); |
| 131 var g62 = (a = eval("'use strict'; x")) => { var x; return a; }; |
| 132 assertEquals(1, g62()); |
| 133 var g7 = (a = function() { return x }) => { var x; return a(); }; |
| 134 assertEquals(1, g7()); |
| 135 var g8 = (a = () => x) => { var x; return a(); }; |
| 136 assertEquals(1, g8()); |
| 137 var g9 = (a = () => eval("x")) => { var x; return a(); }; |
| 138 assertEquals(1, g9()); |
| 139 var g91 = (a = () => eval("x")) => { 'use strict'; var x; return a(); }; |
| 140 assertEquals(1, g91()); |
| 141 var g92 = (a = () => { 'use strict'; return eval("x") }) => { var x; return a(
); }; |
| 142 assertEquals(1, g92()); |
| 143 var g93 = (a = () => eval("'use strict'; x")) => { var x; return a(); }; |
| 144 assertEquals(1, g93()); |
| 145 |
| 146 var f11 = function f(x = f) { var f; return x; } |
| 147 assertSame(f11, f11()); |
| 148 var f12 = function f(x = f) { function f() {}; return x; } |
| 149 assertSame(f12, f12()); |
| 150 var f13 = function f(x = f) { 'use strict'; let f; return x; } |
| 151 assertSame(f13, f13()); |
| 152 var f14 = function f(x = f) { 'use strict'; const f = 0; return x; } |
| 153 assertSame(f14, f14()); |
| 154 var f15 = function f(x = f) { 'use strict'; function f() {}; return x; } |
| 155 assertSame(f15, f15()); |
| 156 var f16 = function f(f = 7, x = f) { return x; } |
| 157 assertSame(7, f16()); |
| 158 |
| 159 var o1 = {f: function(x = this) { return x; }}; |
| 160 assertSame(o1, o1.f()); |
| 161 assertSame(1, o1.f(1)); |
| 162 })(); |
| 163 |
| 164 |
| 165 (function TestParameterTDZ() { |
| 166 function f1(a = x, x) { return a } |
| 167 assertThrows(() => f1(undefined, 4), ReferenceError); |
| 168 assertEquals(4, f1(4, 5)); |
| 169 function f2(a = eval("x"), x) { return a } |
| 170 assertThrows(() => f2(undefined, 4), ReferenceError); |
| 171 assertEquals(4, f2(4, 5)); |
| 172 function f3(a = eval("x"), x) { 'use strict'; return a } |
| 173 assertThrows(() => f3(undefined, 4), ReferenceError); |
| 174 assertEquals(4, f3(4, 5)); |
| 175 function f4(a = eval("'use strict'; x"), x) { return a } |
| 176 assertThrows(() => f4(undefined, 4), ReferenceError); |
| 177 assertEquals(4, f4(4, 5)); |
| 178 |
| 179 function f5(a = () => x, x) { return a() } |
| 180 assertEquals(4, f5(() => 4, 5)); |
| 181 function f6(a = () => eval("x"), x) { return a() } |
| 182 assertEquals(4, f6(() => 4, 5)); |
| 183 function f7(a = () => eval("x"), x) { 'use strict'; return a() } |
| 184 assertEquals(4, f7(() => 4, 5)); |
| 185 function f8(a = () => eval("'use strict'; x"), x) { return a() } |
| 186 assertEquals(4, f8(() => 4, 5)); |
| 187 |
| 188 function f11(a = x, x = 2) { return a } |
| 189 assertThrows(() => f11(), ReferenceError); |
| 190 assertThrows(() => f11(undefined), ReferenceError); |
| 191 assertThrows(() => f11(undefined, 4), ReferenceError); |
| 192 assertEquals(4, f1(4, 5)); |
| 193 function f12(a = eval("x"), x = 2) { return a } |
| 194 assertThrows(() => f12(), ReferenceError); |
| 195 assertThrows(() => f12(undefined), ReferenceError); |
| 196 assertThrows(() => f12(undefined, 4), ReferenceError); |
| 197 assertEquals(4, f12(4, 5)); |
| 198 function f13(a = eval("x"), x = 2) { 'use strict'; return a } |
| 199 assertThrows(() => f13(), ReferenceError); |
| 200 assertThrows(() => f13(undefined), ReferenceError); |
| 201 assertThrows(() => f13(undefined, 4), ReferenceError); |
| 202 assertEquals(4, f13(4, 5)); |
| 203 function f14(a = eval("'use strict'; x"), x = 2) { return a } |
| 204 assertThrows(() => f14(), ReferenceError); |
| 205 assertThrows(() => f14(undefined), ReferenceError); |
| 206 assertThrows(() => f14(undefined, 4), ReferenceError); |
| 207 assertEquals(4, f14(4, 5)); |
| 208 |
| 209 function f34(x = function() { return a }, ...a) { return x()[0] } |
| 210 assertEquals(4, f34(undefined, 4)); |
| 211 function f35(x = () => a, ...a) { return x()[0] } |
| 212 assertEquals(4, f35(undefined, 4)); |
| 213 function f36(x = () => eval("a"), ...a) { return x()[0] } |
| 214 assertEquals(4, f36(undefined, 4)); |
| 215 function f37(x = () => eval("a"), ...a) { 'use strict'; return x()[0] } |
| 216 assertEquals(4, f37(undefined, 4)); |
| 217 function f38(x = () => { 'use strict'; return eval("a") }, ...a) { return x()[
0] } |
| 218 assertEquals(4, f38(undefined, 4)); |
| 219 function f39(x = () => eval("'use strict'; a"), ...a) { return x()[0] } |
| 220 assertEquals(4, f39(undefined, 4)); |
| 221 |
| 222 var g34 = (x = function() { return a }, ...a) => { return x()[0] }; |
| 223 assertEquals(4, g34(undefined, 4)); |
| 224 var g35 = (x = () => a, ...a) => { return x()[0] }; |
| 225 assertEquals(4, g35(undefined, 4)); |
| 226 })(); |
| 227 |
| 228 |
| 229 (function TestArgumentsForNonSimpleParameters() { |
| 230 function f1(x = 900) { arguments[0] = 1; return x } |
| 231 assertEquals(9, f1(9)); |
| 232 assertEquals(900, f1()); |
| 233 function f2(x = 1001) { x = 2; return arguments[0] } |
| 234 assertEquals(10, f2(10)); |
| 235 assertEquals(undefined, f2()); |
| 236 }()); |
| 237 |
| 238 |
| 239 (function TestFunctionLength() { |
| 240 // TODO(rossberg): Fix arity. |
| 241 // assertEquals(0, (function(x = 1) {}).length); |
| 242 // assertEquals(0, (function(x = 1, ...a) {}).length); |
| 243 // assertEquals(1, (function(x, y = 1) {}).length); |
| 244 // assertEquals(1, (function(x, y = 1, ...a) {}).length); |
| 245 // assertEquals(2, (function(x, y, z = 1) {}).length); |
| 246 // assertEquals(2, (function(x, y, z = 1, ...a) {}).length); |
| 247 // assertEquals(1, (function(x, y = 1, z) {}).length); |
| 248 // assertEquals(1, (function(x, y = 1, z, ...a) {}).length); |
| 249 // assertEquals(1, (function(x, y = 1, z, v = 2) {}).length); |
| 250 // assertEquals(1, (function(x, y = 1, z, v = 2, ...a) {}).length); |
| 251 })(); |
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