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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: --allow-natives-syntax --expose-gc
6
7"use strict";
8
9
10function checkPrototypeChain(object, constructors) {
11  var proto = object.__proto__;
12  for (var i = 0; i < constructors.length; i++) {
13    assertEquals(constructors[i].prototype, proto);
14    assertEquals(constructors[i], proto.constructor);
15    proto = proto.__proto__;
16  }
17}
18
19
20(function() {
21  class A extends Object {
22    constructor(...args) {
23      assertFalse(new.target === undefined);
24      super(...args);
25      this.a = 42;
26      this.d = 4.2;
27      this.o = {foo:153};
28    }
29  }
30
31  var s = new A("foo");
32  assertTrue(s instanceof Object);
33  assertTrue(s instanceof A);
34  assertEquals("object", typeof s);
35  checkPrototypeChain(s, [A, Object]);
36  assertEquals(42, s.a);
37  assertEquals(4.2, s.d);
38  assertEquals(153, s.o.foo);
39
40  var s1 = new A("bar");
41  assertTrue(%HaveSameMap(s, s1));
42
43
44  var n = new A(153);
45  assertTrue(n instanceof Object);
46  assertTrue(n instanceof A);
47  assertEquals("object", typeof s);
48  checkPrototypeChain(s, [A, Object]);
49  assertEquals(42, n.a);
50  assertEquals(4.2, n.d);
51  assertEquals(153, n.o.foo);
52
53  var n1 = new A(312);
54  assertTrue(%HaveSameMap(n, n1));
55  assertTrue(%HaveSameMap(n, s));
56
57
58  var b = new A(true);
59  assertTrue(b instanceof Object);
60  assertTrue(b instanceof A);
61  assertEquals("object", typeof s);
62  checkPrototypeChain(s, [A, Object]);
63  assertEquals(42, b.a);
64  assertEquals(4.2, b.d);
65  assertEquals(153, b.o.foo);
66
67  var b1 = new A(true);
68  assertTrue(%HaveSameMap(b, b1));
69  assertTrue(%HaveSameMap(b, s));
70
71  gc();
72})();
73
74
75(function() {
76  class A extends Function {
77    constructor(...args) {
78      assertFalse(new.target === undefined);
79      super(...args);
80      this.a = 42;
81      this.d = 4.2;
82      this.o = {foo:153};
83    }
84  }
85  var sloppy_func = new A("");
86  var strict_func = new A("'use strict';");
87  assertNull(sloppy_func.caller);
88  assertThrows("strict_f.caller");
89  assertNull(Object.getOwnPropertyDescriptor(sloppy_func, "caller").value);
90  assertEquals(undefined, Object.getOwnPropertyDescriptor(strict_func, "caller"));
91
92  function CheckFunction(func) {
93    assertEquals("function", typeof func);
94    assertTrue(func instanceof Object);
95    assertTrue(func instanceof Function);
96    assertTrue(func instanceof A);
97    checkPrototypeChain(func, [A, Function, Object]);
98    assertEquals(42, func.a);
99    assertEquals(4.2, func.d);
100    assertEquals(153, func.o.foo);
101    assertTrue(undefined !== func.prototype);
102    func.prototype.bar = "func.bar";
103    var obj = new func();
104    assertTrue(obj instanceof Object);
105    assertTrue(obj instanceof func);
106    assertEquals("object", typeof obj);
107    assertEquals(113, obj.foo);
108    assertEquals("func.bar", obj.bar);
109    delete func.prototype.bar;
110  }
111
112  var source = "this.foo = 113;";
113
114  // Sloppy function
115  var sloppy_func = new A(source);
116  assertTrue(undefined !== sloppy_func.prototype);
117  CheckFunction(sloppy_func, false);
118
119  var sloppy_func1 = new A("return 312;");
120  assertTrue(%HaveSameMap(sloppy_func, sloppy_func1));
121
122  // Strict function
123  var strict_func = new A("'use strict'; " + source);
124  assertFalse(%HaveSameMap(strict_func, sloppy_func));
125  CheckFunction(strict_func, false);
126
127  var strict_func1 = new A("'use strict'; return 312;");
128  assertTrue(%HaveSameMap(strict_func, strict_func1));
129
130  gc();
131})();
132
133
134(function() {
135  class A extends Boolean {
136    constructor(...args) {
137      assertFalse(new.target === undefined);
138      super(...args);
139      this.a = 42;
140      this.d = 4.2;
141      this.o = {foo:153};
142    }
143  }
144
145  var o = new A(true);
146  assertTrue(o instanceof Object);
147  assertTrue(o instanceof Boolean);
148  assertTrue(o instanceof A);
149  assertEquals("object", typeof o);
150  checkPrototypeChain(o, [A, Boolean]);
151  assertTrue(o.valueOf());
152  assertEquals(42, o.a);
153  assertEquals(4.2, o.d);
154  assertEquals(153, o.o.foo);
155
156  var o1 = new A(false);
157  assertTrue(%HaveSameMap(o, o1));
158
159  gc();
160})();
161
162
163function TestErrorSubclassing(error) {
164  class A extends error {
165    constructor(...args) {
166      assertFalse(new.target === undefined);
167      super(...args);
168      this.a = 42;
169      this.d = 4.2;
170      this.o = {foo:153};
171    }
172  }
173
174  var o = new A("message");
175  assertTrue(o instanceof Object);
176  assertTrue(o instanceof error);
177  assertTrue(o instanceof Error);
178  assertTrue(o instanceof A);
179  assertEquals("object", typeof o);
180  if (error == Error) {
181    checkPrototypeChain(o, [A, Error, Object]);
182  } else {
183    checkPrototypeChain(o, [A, error, Error, Object]);
184  }
185  assertEquals("message", o.message);
186  assertEquals(error.name + ": message", o.toString());
187  assertEquals(42, o.a);
188  assertEquals(4.2, o.d);
189  assertEquals(153, o.o.foo);
190
191  var o1 = new A("achtung!");
192  assertTrue(%HaveSameMap(o, o1));
193
194  gc();
195}
196
197
198(function() {
199  TestErrorSubclassing(Error);
200  TestErrorSubclassing(EvalError);
201  TestErrorSubclassing(RangeError);
202  TestErrorSubclassing(ReferenceError);
203  TestErrorSubclassing(SyntaxError);
204  TestErrorSubclassing(TypeError);
205  TestErrorSubclassing(URIError);
206})();
207
208
209(function() {
210  class A extends Number {
211    constructor(...args) {
212      assertFalse(new.target === undefined);
213      super(...args);
214      this.a = 42;
215      this.d = 4.2;
216      this.o = {foo:153};
217    }
218  }
219
220  var o = new A(153);
221  assertTrue(o instanceof Object);
222  assertTrue(o instanceof Number);
223  assertTrue(o instanceof A);
224  assertEquals("object", typeof o);
225  checkPrototypeChain(o, [A, Number, Object]);
226  assertEquals(153, o.valueOf());
227  assertEquals(42, o.a);
228  assertEquals(4.2, o.d);
229  assertEquals(153, o.o.foo);
230
231  var o1 = new A(312);
232  assertTrue(%HaveSameMap(o, o1));
233
234  gc();
235})();
236
237
238(function() {
239  class A extends Date {
240    constructor(...args) {
241      assertFalse(new.target === undefined);
242      super(...args);
243      this.a = 42;
244      this.d = 4.2;
245      this.o = {foo:153};
246    }
247  }
248
249  var o = new A(1234567890);
250  assertTrue(o instanceof Object);
251  assertTrue(o instanceof Date);
252  assertTrue(o instanceof A);
253  assertEquals("object", typeof o);
254  checkPrototypeChain(o, [A, Date, Object]);
255  assertEquals(1234567890, o.getTime());
256  assertEquals(42, o.a);
257  assertEquals(4.2, o.d);
258  assertEquals(153, o.o.foo);
259
260  var o1 = new A(2015, 10, 29);
261  assertEquals(2015, o1.getFullYear());
262  assertEquals(10, o1.getMonth());
263  assertEquals(29, o1.getDate());
264  assertTrue(%HaveSameMap(o, o1));
265
266  gc();
267})();
268
269
270(function() {
271  class A extends String {
272    constructor(...args) {
273      assertFalse(new.target === undefined);
274      super(...args);
275      this.a = 42;
276      this.d = 4.2;
277      this.o = {foo:153};
278    }
279  }
280
281  var o = new A("foo");
282  assertTrue(o instanceof Object);
283  assertTrue(o instanceof String);
284  assertTrue(o instanceof A);
285  assertEquals("object", typeof o);
286  checkPrototypeChain(o, [A, String, Object]);
287
288  assertEquals("foo", o.valueOf());
289  assertEquals(42, o.a);
290  assertEquals(4.2, o.d);
291  assertEquals(153, o.o.foo);
292
293  var o1 = new A("bar");
294  assertTrue(%HaveSameMap(o, o1));
295
296  gc();
297})();
298
299
300(function() {
301  class A extends RegExp {
302    constructor(...args) {
303      assertFalse(new.target === undefined);
304      super(...args);
305      this.a = 42;
306      this.d = 4.2;
307      this.o = {foo:153};
308    }
309  }
310
311  var o = new A("o(..)h", "g");
312  assertTrue(o instanceof Object);
313  assertTrue(o instanceof RegExp);
314  assertTrue(o instanceof A);
315  assertEquals("object", typeof o);
316  checkPrototypeChain(o, [A, RegExp, Object]);
317  assertTrue(o.test("ouch"));
318  assertArrayEquals(["ouch", "uc"], o.exec("boom! ouch! bam!"));
319  assertEquals("o(..)h", o.source);
320  assertTrue(o.global);
321  assertFalse(o.ignoreCase);
322  assertFalse(o.multiline);
323  assertEquals(10, o.lastIndex);
324  assertEquals(42, o.a);
325  assertEquals(4.2, o.d);
326  assertEquals(153, o.o.foo);
327
328  var o1 = new A(7);
329  assertTrue(%HaveSameMap(o, o1));
330
331  gc();
332})();
333
334
335(function TestArraySubclassing() {
336  class A extends Array {
337    constructor(...args) {
338      assertFalse(new.target === undefined);
339      super(...args);
340      this.a = 42;
341      this.d = 4.2;
342      this.o = {foo:153};
343    }
344  }
345
346  var o = new Array(13);
347  assertTrue(o instanceof Object);
348  assertTrue(o instanceof Array);
349  assertEquals("object", typeof o);
350  checkPrototypeChain(o, [Array, Object]);
351  assertEquals(13, o.length);
352
353  var o = new A(10);
354  assertTrue(o instanceof Object);
355  assertTrue(o instanceof Array);
356  assertTrue(o instanceof A);
357  assertEquals("object", typeof o);
358  checkPrototypeChain(o, [A, Array, Object]);
359  assertEquals(10, o.length);
360  assertEquals(42, o.a);
361  assertEquals(4.2, o.d);
362  assertEquals(153, o.o.foo);
363
364  var o1 = new A(7);
365  assertTrue(%HaveSameMap(o, o1));
366})();
367
368
369var TypedArray = Uint8Array.__proto__;
370
371function TestTypedArraySubclassing(array) {
372  class A extends array {
373    constructor(...args) {
374      assertFalse(new.target === undefined);
375      super(...args);
376      this.a = 42;
377      this.d = 4.2;
378      this.o = {foo:153};
379    }
380  }
381
382  var o = new array(13);
383  assertTrue(o instanceof Object);
384  assertTrue(o instanceof TypedArray);
385  assertTrue(o instanceof array);
386  assertEquals("object", typeof o);
387  checkPrototypeChain(o, [array, TypedArray, Object]);
388  assertEquals(13, o.length);
389
390  var o = new A(10);
391  assertTrue(o instanceof Object);
392  assertTrue(o instanceof TypedArray);
393  assertTrue(o instanceof array);
394  assertTrue(o instanceof A);
395  assertEquals("object", typeof o);
396  checkPrototypeChain(o, [A, array, TypedArray, Object]);
397  assertEquals(10, o.length);
398  assertEquals(42, o.a);
399  assertEquals(4.2, o.d);
400  assertEquals(153, o.o.foo);
401
402  var o1 = new A(7);
403  assertTrue(%HaveSameMap(o, o1));
404}
405
406
407(function() {
408  TestTypedArraySubclassing(Int8Array);
409  TestTypedArraySubclassing(Uint8Array);
410  TestTypedArraySubclassing(Uint8ClampedArray);
411  TestTypedArraySubclassing(Int16Array);
412  TestTypedArraySubclassing(Uint16Array);
413  TestTypedArraySubclassing(Int32Array);
414  TestTypedArraySubclassing(Uint32Array);
415  TestTypedArraySubclassing(Float32Array);
416  TestTypedArraySubclassing(Float64Array);
417})();
418
419
420function TestMapSetSubclassing(container, is_map) {
421  var keys = [{name: "banana"}, {name: "cow"}, {name: "orange"}, {name: "chicken"}, {name: "apple"}];
422
423  class A extends container {
424    constructor(...args) {
425      assertFalse(new.target === undefined);
426      super(...args);
427      this.a = 42;
428      this.d = 4.2;
429      this.o = {foo:153};
430    }
431  }
432
433  var o = new A();
434  assertTrue(o instanceof Object);
435  assertTrue(o instanceof container);
436  assertTrue(o instanceof A);
437  assertEquals("object", typeof o);
438  checkPrototypeChain(o, [A, container, Object]);
439
440  for (var i = 0; i < keys.length; i++) {
441    if (is_map) {
442      o.set(keys[i], (i + 1) * 11);
443    } else {
444      o.add(keys[i]);
445    }
446  }
447  o.delete(keys[1]);
448  o.delete(keys[3]);
449
450  assertTrue(o.has(keys[0]));
451  assertFalse(o.has(keys[1]));
452  assertTrue(o.has(keys[2]));
453  assertFalse(o.has(keys[1]));
454  assertTrue(o.has(keys[4]));
455  if (is_map) {
456    assertEquals(11, o.get(keys[0]));
457    assertEquals(undefined, o.get(keys[1]));
458    assertEquals(33, o.get(keys[2]));
459    assertEquals(undefined, o.get(keys[3]));
460    assertEquals(55, o.get(keys[4]));
461  }
462  assertEquals(42, o.a);
463  assertEquals(4.2, o.d);
464  assertEquals(153, o.o.foo);
465
466  var o1 = new A();
467  assertTrue(%HaveSameMap(o, o1));
468
469  gc();
470}
471
472
473(function() {
474  TestMapSetSubclassing(Map, true);
475  TestMapSetSubclassing(WeakMap, true);
476  TestMapSetSubclassing(Set, false);
477  TestMapSetSubclassing(WeakSet, false);
478})();
479
480
481(function() {
482  class A extends ArrayBuffer {
483    constructor(...args) {
484      assertFalse(new.target === undefined);
485      super(...args);
486      this.a = 42;
487      this.d = 4.2;
488      this.o = {foo:153};
489    }
490  }
491
492  var o = new A(16);
493  assertTrue(o instanceof Object);
494  assertTrue(o instanceof ArrayBuffer);
495  assertTrue(o instanceof A);
496  assertEquals("object", typeof o);
497  checkPrototypeChain(o, [A, ArrayBuffer, Object]);
498
499  assertEquals(16, o.byteLength);
500  assertEquals(42, o.a);
501  assertEquals(4.2, o.d);
502  assertEquals(153, o.o.foo);
503
504  var o1 = new A("bar");
505  assertTrue(%HaveSameMap(o, o1));
506
507
508  class MyInt32Array extends Int32Array {
509    constructor(v, name) {
510      super(v);
511      this.name = name;
512    }
513  }
514
515  class MyUint32Array extends Uint32Array {
516    constructor(v, name) {
517      super(v);
518      this.name = name;
519    }
520  }
521
522  var int32view = new MyInt32Array(o, "cats");
523  var uint32view = new MyUint32Array(o, "dogs");
524
525  int32view[0] = -2;
526  uint32view[1] = 0xffffffff;
527
528  assertEquals("cats", int32view.name);
529  assertEquals("dogs", uint32view.name);
530  assertEquals(-2, int32view[0]);
531  assertEquals(-1, int32view[1]);
532  assertEquals(0xfffffffe, uint32view[0]);
533  assertEquals(0xffffffff, uint32view[1]);
534
535  gc();
536})();
537
538
539(function() {
540  class A extends DataView {
541    constructor(...args) {
542      assertFalse(new.target === undefined);
543      super(...args);
544      this.a = 42;
545      this.d = 4.2;
546      this.o = {foo:153};
547    }
548  }
549
550  var buffer = new ArrayBuffer(16);
551  var o = new A(buffer);
552  assertTrue(o instanceof Object);
553  assertTrue(o instanceof DataView);
554  assertTrue(o instanceof A);
555  assertEquals("object", typeof o);
556  checkPrototypeChain(o, [A, DataView, Object]);
557
558  o.setUint32(0, 0xcafebabe, false);
559  assertEquals(0xcafebabe, o.getUint32(0, false));
560  assertEquals(0xbebafeca, o.getUint32(0, true));
561  assertEquals(42, o.a);
562  assertEquals(4.2, o.d);
563  assertEquals(153, o.o.foo);
564
565  var o1 = new A(buffer);
566  assertTrue(%HaveSameMap(o, o1));
567
568  gc();
569})();
570
571
572(function() {
573  var GeneratorFunction = (function*() {}).constructor;
574  class A extends GeneratorFunction {
575    constructor(...args) {
576      assertFalse(new.target === undefined);
577      super(...args);
578      this.a = 42;
579      this.d = 4.2;
580      this.o = {foo:153};
581    }
582  }
583  var sloppy_func = new A("yield 153;");
584  var strict_func = new A("'use strict'; yield 153;");
585  // Unfortunately the difference is not observable from outside.
586  assertThrows("sloppy_func.caller");
587  assertThrows("strict_f.caller");
588  assertEquals(undefined, Object.getOwnPropertyDescriptor(sloppy_func, "caller"));
589  assertEquals(undefined, Object.getOwnPropertyDescriptor(strict_func, "caller"));
590
591  function CheckFunction(func) {
592    assertEquals("function", typeof func);
593    assertTrue(func instanceof Object);
594    assertTrue(func instanceof Function);
595    assertTrue(func instanceof GeneratorFunction);
596    assertTrue(func instanceof A);
597    checkPrototypeChain(func, [A, GeneratorFunction, Function, Object]);
598
599    assertEquals(42, func.a);
600    assertEquals(4.2, func.d);
601    assertEquals(153, func.o.foo);
602
603    assertTrue(undefined !== func.prototype);
604    func.prototype.bar = "func.bar";
605    var obj = func();  // Generator object.
606    assertTrue(obj instanceof Object);
607    assertTrue(obj instanceof func);
608    assertEquals("object", typeof obj);
609    assertEquals("func.bar", obj.bar);
610    delete func.prototype.bar;
611
612    assertPropertiesEqual({done: false, value: 1}, obj.next());
613    assertPropertiesEqual({done: false, value: 1}, obj.next());
614    assertPropertiesEqual({done: false, value: 2}, obj.next());
615    assertPropertiesEqual({done: false, value: 3}, obj.next());
616    assertPropertiesEqual({done: false, value: 5}, obj.next());
617    assertPropertiesEqual({done: false, value: 8}, obj.next());
618    assertPropertiesEqual({done: true, value: undefined}, obj.next());
619  }
620
621  var source = "yield 1; yield 1; yield 2; yield 3; yield 5; yield 8;";
622
623  // Sloppy generator function
624  var sloppy_func = new A(source);
625  assertTrue(undefined !== sloppy_func.prototype);
626  CheckFunction(sloppy_func, false);
627
628  var sloppy_func1 = new A("yield 312;");
629  assertTrue(%HaveSameMap(sloppy_func, sloppy_func1));
630
631  // Strict generator function
632  var strict_func = new A("'use strict'; " + source);
633  assertFalse(%HaveSameMap(strict_func, sloppy_func));
634  CheckFunction(strict_func, false);
635
636  var strict_func1 = new A("'use strict'; yield 312;");
637  assertTrue(%HaveSameMap(strict_func, strict_func1));
638
639  gc();
640})();
641
642
643(function() {
644  class A extends Promise {
645    constructor(...args) {
646      assertFalse(new.target === undefined);
647      super(...args);
648      this.a = 42;
649      this.d = 4.2;
650      this.o = {foo:153};
651    }
652  }
653
654  var o = new A(function(resolve, reject) {
655    resolve("ok");
656  });
657  assertTrue(o instanceof Object);
658  assertTrue(o instanceof Promise);
659  assertTrue(o instanceof A);
660  assertEquals("object", typeof o);
661  checkPrototypeChain(o, [A, Promise, Object]);
662  assertEquals(42, o.a);
663  assertEquals(4.2, o.d);
664  assertEquals(153, o.o.foo);
665  o.then(
666      function(val) { assertEquals("ok", val); },
667      function(reason) { assertUnreachable(); })
668    .catch(function(reason) { %AbortJS("catch handler called: " + reason); });
669
670  var o1 = new A(function(resolve, reject) {
671    reject("fail");
672  });
673  o1.then(
674      function(val) { assertUnreachable(); },
675      function(reason) { assertEquals("fail", reason); })
676    .catch(function(reason) { %AbortJS("catch handler called: " + reason); });
677  assertTrue(%HaveSameMap(o, o1));
678
679  gc();
680})();
681
682
683(function() {
684  class A extends Boolean {
685    constructor() {
686      assertFalse(new.target === undefined);
687      super(true);
688      this.a00 = 0
689      this.a01 = 0
690      this.a02 = 0
691      this.a03 = 0
692      this.a04 = 0
693      this.a05 = 0
694      this.a06 = 0
695      this.a07 = 0
696      this.a08 = 0
697      this.a09 = 0
698      this.a10 = 0
699      this.a11 = 0
700      this.a12 = 0
701      this.a13 = 0
702      this.a14 = 0
703      this.a15 = 0
704      this.a16 = 0
705      this.a17 = 0
706      this.a18 = 0
707      this.a19 = 0
708    }
709  }
710
711  class B extends A {
712    constructor() {
713      assertFalse(new.target === undefined);
714      super();
715      this.b00 = 0
716      this.b01 = 0
717      this.b02 = 0
718      this.b03 = 0
719      this.b04 = 0
720      this.b05 = 0
721      this.b06 = 0
722      this.b07 = 0
723      this.b08 = 0
724      this.b09 = 0
725      this.b10 = 0
726      this.b11 = 0
727      this.b12 = 0
728      this.b13 = 0
729      this.b14 = 0
730      this.b15 = 0
731      this.b16 = 0
732      this.b17 = 0
733      this.b18 = 0
734      this.b19 = 0
735    }
736  }
737
738  class C extends B {
739    constructor() {
740      assertFalse(new.target === undefined);
741      super();
742      this.c00 = 0
743      this.c01 = 0
744      this.c02 = 0
745      this.c03 = 0
746      this.c04 = 0
747      this.c05 = 0
748      this.c06 = 0
749      this.c07 = 0
750      this.c08 = 0
751      this.c09 = 0
752      this.c10 = 0
753      this.c11 = 0
754      this.c12 = 0
755      this.c13 = 0
756      this.c14 = 0
757      this.c15 = 0
758      this.c16 = 0
759      this.c17 = 0
760      this.c18 = 0
761      this.c19 = 0
762    }
763  }
764
765  var o = new C();
766  assertTrue(o instanceof Object);
767  assertTrue(o instanceof Boolean);
768  assertTrue(o instanceof A);
769  assertTrue(o instanceof B);
770  assertTrue(o instanceof C);
771  assertEquals("object", typeof o);
772  checkPrototypeChain(o, [C, B, A, Boolean, Object]);
773
774  gc();
775})();
776
777
778(function() {
779  assertThrows("class A extends undefined {}");
780  assertThrows("class B extends NaN {}");
781  assertThrows("class C extends Infinity {}");
782})();
783
784
785(function() {
786  class A extends null {}
787  assertThrows("new A");
788})();
789
790
791(function() {
792  class A extends Symbol {}
793  assertThrows("new A");
794})();
795
796
797(function() {
798  function f() {}
799
800  var p = f.prototype;
801  var p2 = {};
802  var o = Reflect.construct(
803        Number, [{valueOf() { f.prototype=p2; return 10; }}], f);
804
805  assertTrue(o.__proto__ === f.prototype);
806  assertTrue(p2 === f.prototype);
807  assertFalse(p === o.__proto__);
808  assertEquals(10, Number.prototype.valueOf.call(o));
809})();
810
811
812(function() {
813  function f() {}
814
815  var p = f.prototype;
816  var p2 = {};
817  var o = Reflect.construct(
818        String, [{toString() { f.prototype=p2; return "biep"; }}], f);
819
820  assertTrue(o.__proto__ === f.prototype);
821  assertTrue(p2 === o.__proto__);
822  assertFalse(p === o.__proto__);
823  assertEquals("biep", String.prototype.toString.call(o));
824})();
825
826
827(function() {
828  function f() {}
829
830  var p = f.prototype;
831  var p2 = {};
832  var o = Reflect.construct(
833        Date, [{valueOf() { f.prototype=p2; return 1447836899614; }}], f);
834
835  assertTrue(o.__proto__ === f.prototype);
836  assertTrue(p2 === f.prototype);
837  assertFalse(p === o.__proto__);
838  assertEquals(new Date(1447836899614).toString(),
839               Date.prototype.toString.call(o));
840})();
841
842
843(function() {
844  function f() {}
845
846  var p = f.prototype;
847  var p2 = {};
848  var o = Reflect.construct(
849        Date, [2015, {valueOf() { f.prototype=p2; return 10; }}], f);
850
851  assertTrue(o.__proto__ === f.prototype);
852  assertTrue(p2 === f.prototype);
853  assertFalse(p === o.__proto__);
854  assertEquals(new Date(2015, 10).getYear(), Date.prototype.getYear.call(o));
855  assertEquals(new Date(2015, 10).getMonth(), Date.prototype.getMonth.call(o));
856})();
857
858
859(function() {
860  function f() {}
861
862  var p = f.prototype;
863  var p2 = {};
864  var o = Reflect.construct(
865        DataView, [new ArrayBuffer(100),
866                   {valueOf(){ f.prototype=p2; return 5; }}], f);
867
868  var byteOffset = Object.getOwnPropertyDescriptor(
869      DataView.prototype, "byteOffset").get;
870  var byteLength = Object.getOwnPropertyDescriptor(
871      DataView.prototype, "byteLength").get;
872
873  assertTrue(o.__proto__ === f.prototype);
874  assertTrue(p2 === f.prototype);
875  assertFalse(p === o.__proto__);
876  assertEquals(5, byteOffset.call(o));
877  assertEquals(95, byteLength.call(o));
878})();
879
880
881(function() {
882  function f() {}
883
884  var p = f.prototype;
885  var p2 = {};
886  var o = Reflect.construct(
887        DataView, [new ArrayBuffer(100),
888                   30, {valueOf() { f.prototype=p2; return 5; }}], f);
889
890  var byteOffset = Object.getOwnPropertyDescriptor(
891      DataView.prototype, "byteOffset").get;
892  var byteLength = Object.getOwnPropertyDescriptor(
893      DataView.prototype, "byteLength").get;
894
895  assertTrue(o.__proto__ === f.prototype);
896  assertTrue(p2 === f.prototype);
897  assertFalse(p === o.__proto__);
898  assertEquals(30, byteOffset.call(o));
899  assertEquals(5, byteLength.call(o));
900})();
901
902
903(function() {
904  function f() {}
905
906  var p = f.prototype;
907  var p2 = {};
908  var p3 = {};
909
910  var log = [];
911
912  var pattern = {toString() {
913    log.push("tostring");
914    f.prototype = p3; return "biep" }};
915
916  Object.defineProperty(pattern, Symbol.match, {
917    get() { log.push("match"); f.prototype = p2; return false; }});
918
919  var o = Reflect.construct(RegExp, [pattern], f);
920  assertEquals(["match", "tostring"], log);
921  // TODO(littledan): Is the RegExp constructor correct to create
922  // the internal slots and do these type checks this way?
923  assertEquals("biep", %_RegExpSource(o));
924  assertThrows(() => Object.getOwnPropertyDescriptor(RegExp.prototype,
925                                                     'source').get(o),
926               TypeError);
927  assertEquals("/undefined/undefined", RegExp.prototype.toString.call(o));
928  assertTrue(o.__proto__ === p2);
929  assertTrue(f.prototype === p3);
930})();
931