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| 1 // Copyright 2014 the V8 project authors. All rights reserved. | 1 // Copyright 2014 the V8 project authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 // | 4 // |
| 5 // Flags: --experimental-classes --harmony-classes | 5 // Flags: --experimental-classes --harmony-classes |
| 6 | 6 |
| 7 'use strict'; | 7 'use strict'; |
| 8 (function TestArgumentsAccess() { | 8 |
| 9 class Base { | 9 class Base { |
| 10 constructor() { | 10 constructor(a, b) { |
| 11 assertEquals(2, arguments.length); | 11 let o = new Object(); |
| 12 assertEquals(1, arguments[0]); | 12 o.prp = a + b; |
| 13 assertEquals(2, arguments[1]); | 13 return o; |
| 14 } |
| 15 } |
| 16 |
| 17 class Subclass extends Base { |
| 18 constructor(a, b) { |
| 19 var exn; |
| 20 try { |
| 21 this.prp1 = 3; |
| 22 } catch (e) { |
| 23 exn = e; |
| 14 } | 24 } |
| 25 assertTrue(exn instanceof ReferenceError); |
| 26 super(a, b); |
| 27 assertSame(a + b, this.prp); |
| 28 assertSame(undefined, this.prp1); |
| 29 assertFalse(this.hasOwnProperty("prp1")); |
| 30 return this; |
| 15 } | 31 } |
| 32 } |
| 16 | 33 |
| 17 let b = new Base(1,2); | 34 let b = new Base(1, 2); |
| 18 | 35 assertSame(3, b.prp); |
| 19 class Subclass extends Base { | |
| 20 constructor() { | |
| 21 assertEquals(2, arguments.length); | |
| 22 assertEquals(3, arguments[0]); | |
| 23 assertEquals(4, arguments[1]); | |
| 24 super(1,2); | |
| 25 } | |
| 26 } | |
| 27 | |
| 28 let s = new Subclass(3,4); | |
| 29 assertEquals(0, Subclass.length); | |
| 30 | |
| 31 class Subclass2 extends Base { | |
| 32 constructor(x,y) { | |
| 33 assertEquals(2, arguments.length); | |
| 34 assertEquals(3, arguments[0]); | |
| 35 assertEquals(4, arguments[1]); | |
| 36 super(1,2); | |
| 37 } | |
| 38 } | |
| 39 | |
| 40 let s2 = new Subclass2(3,4); | |
| 41 assertEquals(2, Subclass2.length); | |
| 42 }()); | |
| 43 | |
| 44 (function TestThisAccessRestriction() { | |
| 45 class Base { | |
| 46 constructor(a, b) { | |
| 47 let o = new Object(); | |
| 48 o.prp = a + b; | |
| 49 return o; | |
| 50 } | |
| 51 } | |
| 52 | |
| 53 class Subclass extends Base { | |
| 54 constructor(a, b) { | |
| 55 var exn; | |
| 56 try { | |
| 57 this.prp1 = 3; | |
| 58 } catch (e) { | |
| 59 exn = e; | |
| 60 } | |
| 61 assertTrue(exn instanceof ReferenceError); | |
| 62 super(a, b); | |
| 63 assertSame(a + b, this.prp); | |
| 64 assertSame(undefined, this.prp1); | |
| 65 assertFalse(this.hasOwnProperty("prp1")); | |
| 66 return this; | |
| 67 } | |
| 68 } | |
| 69 | |
| 70 let b = new Base(1, 2); | |
| 71 assertSame(3, b.prp); | |
| 72 | 36 |
| 73 | 37 |
| 74 let s = new Subclass(2, -1); | 38 let s = new Subclass(2, -1); |
| 75 assertSame(1, s.prp); | 39 assertSame(1, s.prp); |
| 76 assertSame(undefined, s.prp1); | 40 assertSame(undefined, s.prp1); |
| 77 assertFalse(s.hasOwnProperty("prp1")); | 41 assertFalse(s.hasOwnProperty("prp1")); |
| 78 | 42 |
| 79 class Subclass2 extends Base { | 43 class Subclass2 extends Base { |
| 80 constructor(x) { | 44 constructor(x) { |
| 81 super(1,2); | 45 super(1,2); |
| 82 | 46 |
| 83 if (x < 0) return; | 47 if (x < 0) return; |
| 84 | 48 |
| 85 let called = false; | 49 let called = false; |
| 86 function tmp() { called = true; return 3; } | 50 function tmp() { called = true; return 3; } |
| 87 var exn = null; | 51 var exn = null; |
| 88 try { | 52 try { |
| 89 super(tmp(),4); | 53 super(tmp(),4); |
| 90 } catch (e) { exn = e; } | 54 } catch(e) { exn = e; } |
| 91 assertTrue(exn instanceof ReferenceError); | 55 assertTrue(exn !== null); |
| 92 // TODO(dslomov): should be 'true'. | 56 assertFalse(called); |
| 93 assertFalse(called); | |
| 94 } | |
| 95 } | 57 } |
| 58 } |
| 96 | 59 |
| 97 var s2 = new Subclass2(1); | 60 var s2 = new Subclass2(1); |
| 98 assertSame(3, s2.prp); | 61 assertSame(3, s2.prp); |
| 99 | 62 |
| 100 var s3 = new Subclass2(-1); | 63 var s3 = new Subclass2(-1); |
| 101 assertSame(3, s3.prp); | 64 assertSame(3, s3.prp); |
| 102 | 65 |
| 103 assertThrows(function() { Subclass.call(new Object(), 1, 2); }, TypeError); | 66 assertThrows(function() { Subclass.call(new Object(), 1, 2); }, TypeError); |
| 104 assertThrows(function() { Base.call(new Object(), 1, 2); }, TypeError); | 67 assertThrows(function() { Base.call(new Object(), 1, 2); }, TypeError); |
| 105 | |
| 106 class BadSubclass extends Base { | |
| 107 constructor() {} | |
| 108 } | |
| 109 | |
| 110 assertThrows(function() { new BadSubclass(); }, ReferenceError); | |
| 111 }()); | |
| 112 | |
| 113 (function TestPrototypeWiring() { | |
| 114 class Base { | |
| 115 constructor(x) { | |
| 116 this.foobar = x; | |
| 117 } | |
| 118 } | |
| 119 | |
| 120 class Subclass extends Base { | |
| 121 constructor(x) { | |
| 122 super(x); | |
| 123 } | |
| 124 } | |
| 125 | |
| 126 let s = new Subclass(1); | |
| 127 assertSame(1, s.foobar); | |
| 128 assertSame(Subclass.prototype, s.__proto__); | |
| 129 | |
| 130 let s1 = new Subclass(1, 2); | |
| 131 assertSame(1, s1.foobar); | |
| 132 assertTrue(s1.__proto__ === Subclass.prototype); | |
| 133 | |
| 134 let s2 = new Subclass(); | |
| 135 assertSame(undefined, s2.foobar); | |
| 136 assertSame(Subclass.prototype, s2.__proto__); | |
| 137 assertThrows(function() { Subclass(1); }, TypeError); | |
| 138 assertThrows(function() { Subclass(1,2,3,4); }, TypeError); | |
| 139 | |
| 140 class Subclass2 extends Subclass { | |
| 141 constructor() { | |
| 142 super(5, 6, 7); | |
| 143 } | |
| 144 } | |
| 145 | |
| 146 let ss2 = new Subclass2(); | |
| 147 assertSame(5, ss2.foobar); | |
| 148 assertSame(Subclass2.prototype, ss2.__proto__); | |
| 149 | |
| 150 class Subclass3 extends Base { | |
| 151 constructor(x,y) { | |
| 152 super(x + y); | |
| 153 } | |
| 154 } | |
| 155 | |
| 156 let ss3 = new Subclass3(27,42-27); | |
| 157 assertSame(42, ss3.foobar); | |
| 158 assertSame(Subclass3.prototype, ss3.__proto__); | |
| 159 }()); | |
| 160 | |
| 161 (function TestSublclassingBuiltins() { | |
| 162 class ExtendedUint8Array extends Uint8Array { | |
| 163 constructor() { | |
| 164 super(10); | |
| 165 this[0] = 255; | |
| 166 this[1] = 0xFFA; | |
| 167 } | |
| 168 } | |
| 169 | |
| 170 var eua = new ExtendedUint8Array(); | |
| 171 assertEquals(10, eua.length); | |
| 172 assertEquals(10, eua.byteLength); | |
| 173 assertEquals(0xFF, eua[0]); | |
| 174 assertEquals(0xFA, eua[1]); | |
| 175 assertTrue(eua.__proto__ === ExtendedUint8Array.prototype); | |
| 176 assertEquals("[object Uint8Array]", Object.prototype.toString.call(eua)); | |
| 177 }()); | |
| 178 | |
| 179 (function TestSubclassingNull() { | |
| 180 let N = null; | |
| 181 | |
| 182 class Foo extends N { | |
| 183 constructor(x,y) { | |
| 184 assertSame(1, x); | |
| 185 assertSame(2, y); | |
| 186 return {}; | |
| 187 } | |
| 188 } | |
| 189 | |
| 190 new Foo(1,2); | |
| 191 }()); | |
| 192 | |
| 193 (function TestSubclassBinding() { | |
| 194 class Base { | |
| 195 constructor(x, y) { | |
| 196 this.x = x; | |
| 197 this.y = y; | |
| 198 } | |
| 199 } | |
| 200 | |
| 201 let obj = {}; | |
| 202 class Subclass extends Base { | |
| 203 constructor(x,y) { | |
| 204 super(x,y); | |
| 205 assertTrue(this !== obj); | |
| 206 } | |
| 207 } | |
| 208 | |
| 209 let f = Subclass.bind(obj); | |
| 210 assertThrows(function () { f(1, 2); }, TypeError); | |
| 211 let s = new f(1, 2); | |
| 212 assertSame(1, s.x); | |
| 213 assertSame(2, s.y); | |
| 214 assertSame(Subclass.prototype, s.__proto__); | |
| 215 | |
| 216 let s1 = new f(1); | |
| 217 assertSame(1, s1.x); | |
| 218 assertSame(undefined, s1.y); | |
| 219 assertSame(Subclass.prototype, s1.__proto__); | |
| 220 | |
| 221 let g = Subclass.bind(obj, 1); | |
| 222 assertThrows(function () { g(8); }, TypeError); | |
| 223 let s2 = new g(8); | |
| 224 assertSame(1, s2.x); | |
| 225 assertSame(8, s2.y); | |
| 226 assertSame(Subclass.prototype, s.__proto__); | |
| 227 }()); | |
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