Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 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 |
| 3 | // found in the LICENSE file. |
| 4 | |
| 5 | 'use strict'; |
| 6 | (function TestArgumentsAccess() { |
| 7 | class Base { |
| 8 | constructor() { |
| 9 | assertEquals(2, arguments.length); |
| 10 | assertEquals(1, arguments[0]); |
| 11 | assertEquals(2, arguments[1]); |
| 12 | } |
| 13 | } |
| 14 | |
| 15 | let b = new Base(1,2); |
| 16 | |
| 17 | class Subclass extends Base { |
| 18 | constructor() { |
| 19 | assertEquals(2, arguments.length); |
| 20 | assertEquals(3, arguments[0]); |
| 21 | assertEquals(4, arguments[1]); |
| 22 | super(1,2); |
| 23 | } |
| 24 | } |
| 25 | |
| 26 | let s = new Subclass(3,4); |
| 27 | assertEquals(0, Subclass.length); |
| 28 | |
| 29 | class Subclass2 extends Base { |
| 30 | constructor(x,y) { |
| 31 | assertEquals(2, arguments.length); |
| 32 | assertEquals(3, arguments[0]); |
| 33 | assertEquals(4, arguments[1]); |
| 34 | super(1,2); |
| 35 | } |
| 36 | } |
| 37 | |
| 38 | let s2 = new Subclass2(3,4); |
| 39 | assertEquals(2, Subclass2.length); |
| 40 | }()); |
| 41 | |
| 42 | (function TestThisAccessRestriction() { |
| 43 | class Base { |
| 44 | constructor(a, b) { |
| 45 | let o = new Object(); |
| 46 | o.prp = a + b; |
| 47 | return o; |
| 48 | } |
| 49 | } |
| 50 | |
| 51 | class Subclass extends Base { |
| 52 | constructor(a, b) { |
| 53 | var exn; |
| 54 | try { |
| 55 | this.prp1 = 3; |
| 56 | } catch (e) { |
| 57 | exn = e; |
| 58 | } |
| 59 | assertTrue(exn instanceof ReferenceError); |
| 60 | super(a, b); |
| 61 | assertSame(a + b, this.prp); |
| 62 | assertSame(undefined, this.prp1); |
| 63 | assertFalse(this.hasOwnProperty("prp1")); |
| 64 | return this; |
| 65 | } |
| 66 | } |
| 67 | |
| 68 | let b = new Base(1, 2); |
| 69 | assertSame(3, b.prp); |
| 70 | |
| 71 | |
| 72 | let s = new Subclass(2, -1); |
| 73 | assertSame(1, s.prp); |
| 74 | assertSame(undefined, s.prp1); |
| 75 | assertFalse(s.hasOwnProperty("prp1")); |
| 76 | |
| 77 | class Subclass2 extends Base { |
| 78 | constructor(x) { |
| 79 | super(1,2); |
| 80 | |
| 81 | if (x < 0) return; |
| 82 | |
| 83 | let called = false; |
| 84 | function tmp() { called = true; return 3; } |
| 85 | var exn = null; |
| 86 | try { |
| 87 | super(tmp(),4); |
| 88 | } catch (e) { exn = e; } |
| 89 | assertTrue(exn instanceof ReferenceError); |
| 90 | assertTrue(called); |
| 91 | } |
| 92 | } |
| 93 | |
| 94 | var s2 = new Subclass2(1); |
| 95 | assertSame(3, s2.prp); |
| 96 | |
| 97 | var s3 = new Subclass2(-1); |
| 98 | assertSame(3, s3.prp); |
| 99 | |
| 100 | assertThrows(function() { Subclass.call(new Object(), 1, 2); }, TypeError); |
| 101 | assertThrows(function() { Base.call(new Object(), 1, 2); }, TypeError); |
| 102 | |
| 103 | class BadSubclass extends Base { |
| 104 | constructor() {} |
| 105 | } |
| 106 | |
| 107 | assertThrows(function() { new BadSubclass(); }, ReferenceError); |
| 108 | }()); |
| 109 | |
| 110 | (function TestThisCheckOrdering() { |
| 111 | let baseCalled = 0; |
| 112 | class Base { |
| 113 | constructor() { baseCalled++ } |
| 114 | } |
| 115 | |
| 116 | let fCalled = 0; |
| 117 | function f() { fCalled++; return 3; } |
| 118 | |
| 119 | class Subclass1 extends Base { |
| 120 | constructor() { |
| 121 | baseCalled = 0; |
| 122 | super(); |
| 123 | assertEquals(1, baseCalled); |
| 124 | let obj = this; |
| 125 | |
| 126 | let exn = null; |
| 127 | baseCalled = 0; |
| 128 | fCalled = 0; |
| 129 | try { |
| 130 | super(f()); |
| 131 | } catch (e) { exn = e; } |
| 132 | assertTrue(exn instanceof ReferenceError); |
| 133 | assertEquals(1, fCalled); |
| 134 | assertEquals(1, baseCalled); |
| 135 | assertSame(obj, this); |
| 136 | |
| 137 | exn = null; |
| 138 | baseCalled = 0; |
| 139 | fCalled = 0; |
| 140 | try { |
| 141 | super(super(), f()); |
| 142 | } catch (e) { exn = e; } |
| 143 | assertTrue(exn instanceof ReferenceError); |
| 144 | assertEquals(0, fCalled); |
| 145 | assertEquals(1, baseCalled); |
| 146 | assertSame(obj, this); |
| 147 | |
| 148 | exn = null; |
| 149 | baseCalled = 0; |
| 150 | fCalled = 0; |
| 151 | try { |
| 152 | super(f(), super()); |
| 153 | } catch (e) { exn = e; } |
| 154 | assertTrue(exn instanceof ReferenceError); |
| 155 | assertEquals(1, fCalled); |
| 156 | assertEquals(1, baseCalled); |
| 157 | assertSame(obj, this); |
| 158 | } |
| 159 | } |
| 160 | |
| 161 | new Subclass1(); |
| 162 | }()); |
| 163 | |
| 164 | |
| 165 | (function TestPrototypeWiring() { |
| 166 | class Base { |
| 167 | constructor(x) { |
| 168 | this.foobar = x; |
| 169 | } |
| 170 | } |
| 171 | |
| 172 | class Subclass extends Base { |
| 173 | constructor(x) { |
| 174 | super(x); |
| 175 | } |
| 176 | } |
| 177 | |
| 178 | let s = new Subclass(1); |
| 179 | assertSame(1, s.foobar); |
| 180 | assertSame(Subclass.prototype, s.__proto__); |
| 181 | |
| 182 | let s1 = new Subclass(1, 2); |
| 183 | assertSame(1, s1.foobar); |
| 184 | assertTrue(s1.__proto__ === Subclass.prototype); |
| 185 | |
| 186 | let s2 = new Subclass(); |
| 187 | assertSame(undefined, s2.foobar); |
| 188 | assertSame(Subclass.prototype, s2.__proto__); |
| 189 | assertThrows(function() { Subclass(1); }, TypeError); |
| 190 | assertThrows(function() { Subclass(1,2,3,4); }, TypeError); |
| 191 | |
| 192 | class Subclass2 extends Subclass { |
| 193 | constructor() { |
| 194 | super(5, 6, 7); |
| 195 | } |
| 196 | } |
| 197 | |
| 198 | let ss2 = new Subclass2(); |
| 199 | assertSame(5, ss2.foobar); |
| 200 | assertSame(Subclass2.prototype, ss2.__proto__); |
| 201 | |
| 202 | class Subclass3 extends Base { |
| 203 | constructor(x,y) { |
| 204 | super(x + y); |
| 205 | } |
| 206 | } |
| 207 | |
| 208 | let ss3 = new Subclass3(27,42-27); |
| 209 | assertSame(42, ss3.foobar); |
| 210 | assertSame(Subclass3.prototype, ss3.__proto__); |
| 211 | }()); |
| 212 | |
| 213 | (function TestSublclassingBuiltins() { |
| 214 | class ExtendedUint8Array extends Uint8Array { |
| 215 | constructor() { |
| 216 | super(10); |
| 217 | this[0] = 255; |
| 218 | this[1] = 0xFFA; |
| 219 | } |
| 220 | } |
| 221 | |
| 222 | var eua = new ExtendedUint8Array(); |
| 223 | assertEquals(10, eua.length); |
| 224 | assertEquals(10, eua.byteLength); |
| 225 | assertEquals(0xFF, eua[0]); |
| 226 | assertEquals(0xFA, eua[1]); |
| 227 | assertSame(ExtendedUint8Array.prototype, eua.__proto__); |
| 228 | assertEquals("[object Uint8Array]", Object.prototype.toString.call(eua)); |
| 229 | }()); |
| 230 | |
| 231 | (function TestSubclassingNull() { |
| 232 | let N = null; |
| 233 | |
| 234 | class Foo extends N { |
| 235 | constructor(x,y) { |
| 236 | assertSame(1, x); |
| 237 | assertSame(2, y); |
| 238 | return {}; |
| 239 | } |
| 240 | } |
| 241 | |
| 242 | new Foo(1,2); |
| 243 | }()); |
| 244 | |
| 245 | (function TestSubclassBinding() { |
| 246 | class Base { |
| 247 | constructor(x, y) { |
| 248 | this.x = x; |
| 249 | this.y = y; |
| 250 | } |
| 251 | } |
| 252 | |
| 253 | let obj = {}; |
| 254 | class Subclass extends Base { |
| 255 | constructor(x,y) { |
| 256 | super(x,y); |
| 257 | assertTrue(this !== obj); |
| 258 | } |
| 259 | } |
| 260 | |
| 261 | let f = Subclass.bind(obj); |
| 262 | assertThrows(function () { f(1, 2); }, TypeError); |
| 263 | let s = new f(1, 2); |
| 264 | assertSame(1, s.x); |
| 265 | assertSame(2, s.y); |
| 266 | assertSame(Subclass.prototype, s.__proto__); |
| 267 | |
| 268 | let s1 = new f(1); |
| 269 | assertSame(1, s1.x); |
| 270 | assertSame(undefined, s1.y); |
| 271 | assertSame(Subclass.prototype, s1.__proto__); |
| 272 | |
| 273 | let g = Subclass.bind(obj, 1); |
| 274 | assertThrows(function () { g(8); }, TypeError); |
| 275 | let s2 = new g(8); |
| 276 | assertSame(1, s2.x); |
| 277 | assertSame(8, s2.y); |
| 278 | assertSame(Subclass.prototype, s.__proto__); |
| 279 | }()); |
| 280 | |
| 281 | |
| 282 | (function TestDefaultConstructor() { |
| 283 | class Base1 { } |
| 284 | assertThrows(function() { Base1(); }, TypeError); |
| 285 | |
| 286 | class Subclass1 extends Base1 { } |
| 287 | |
| 288 | assertThrows(function() { Subclass1(); }, TypeError); |
| 289 | |
| 290 | let s1 = new Subclass1(); |
| 291 | assertSame(s1.__proto__, Subclass1.prototype); |
| 292 | |
| 293 | class Base2 { |
| 294 | constructor(x, y) { |
| 295 | this.x = x; |
| 296 | this.y = y; |
| 297 | } |
| 298 | } |
| 299 | |
| 300 | class Subclass2 extends Base2 {}; |
| 301 | |
| 302 | let s2 = new Subclass2(1, 2); |
| 303 | |
| 304 | assertSame(s2.__proto__, Subclass2.prototype); |
| 305 | assertSame(1, s2.x); |
| 306 | assertSame(2, s2.y); |
| 307 | |
| 308 | let f = Subclass2.bind({}, 3, 4); |
| 309 | let s2prime = new f(); |
| 310 | assertSame(s2prime.__proto__, Subclass2.prototype); |
| 311 | assertSame(3, s2prime.x); |
| 312 | assertSame(4, s2prime.y); |
| 313 | |
| 314 | let obj = {}; |
| 315 | class Base3 { |
| 316 | constructor() { |
| 317 | return obj; |
| 318 | } |
| 319 | } |
| 320 | |
| 321 | class Subclass3 extends Base3 {}; |
| 322 | |
| 323 | let s3 = new Subclass3(); |
| 324 | assertSame(obj, s3); |
| 325 | |
| 326 | class ExtendedUint8Array extends Uint8Array { } |
| 327 | |
| 328 | var eua = new ExtendedUint8Array(10); |
| 329 | assertEquals(10, eua.length); |
| 330 | assertEquals(10, eua.byteLength); |
| 331 | eua[0] = 0xFF; |
| 332 | eua[1] = 0xFFA; |
| 333 | assertEquals(0xFF, eua[0]); |
| 334 | assertEquals(0xFA, eua[1]); |
| 335 | assertSame(ExtendedUint8Array.prototype, eua.__proto__); |
| 336 | assertEquals("[object Uint8Array]", Object.prototype.toString.call(eua)); |
| 337 | }()); |