subclassing.js (1508B)
1 // Copyright (C) 2016 the V8 project authors. All rights reserved. 2 // This code is governed by the BSD license found in the LICENSE file. 3 /*--- 4 esid: sec-date-value 5 description: Error retrieving `Symbol.toPrimitive` method from object value 6 info: | 7 3. If NewTarget is not undefined, then 8 [...] 9 c. Let O be ? OrdinaryCreateFromConstructor(NewTarget, "%DatePrototype%", 10 « [[DateValue]] »). 11 [...] 12 13 OrdinaryCreateFromConstructor ( constructor, intrinsicDefaultProto [ , 14 internalSlotsList ] ) 15 16 [...] 17 2. Let proto be ? GetPrototypeFromConstructor(constructor, 18 intrinsicDefaultProto). 19 3. Return ObjectCreate(proto, internalSlotsList). 20 features: [Reflect] 21 ---*/ 22 23 var callCount = 0; 24 var Ctor = function() { 25 callCount += 1; 26 }; 27 var instance; 28 29 instance = Reflect.construct(Date, [64], Ctor); 30 31 assert.sameValue( 32 Object.getPrototypeOf(instance), 33 Ctor.prototype, 34 'constructor defines an object `prototype` property' 35 ); 36 assert.sameValue(callCount, 0, 'constructor not invoked'); 37 assert.sameValue( 38 Date.prototype.getTime.call(instance), 39 64, 40 'proper subclass has a [[DateValue]] slot' 41 ); 42 43 Ctor.prototype = null; 44 instance = Reflect.construct(Date, [64], Ctor); 45 46 assert.sameValue( 47 Object.getPrototypeOf(instance), 48 Date.prototype, 49 'constructor does not defines an object `prototype` property' 50 ); 51 assert.sameValue(callCount, 0, 'constructor not invoked'); 52 assert.sameValue( 53 instance.getTime(), 64, 'direct instance has a [[DateValue]] slot' 54 ); 55 56 reportCompare(0, 0);