test262/test/built-ins/Date/subclassing.js

55 lines
1.5 KiB
JavaScript

// Copyright (C) 2016 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-date-value
description: Error retrieving `Symbol.toPrimitive` method from object value
info: |
3. If NewTarget is not undefined, then
[...]
c. Let O be ? OrdinaryCreateFromConstructor(NewTarget, "%DatePrototype%",
« [[DateValue]] »).
[...]
OrdinaryCreateFromConstructor ( constructor, intrinsicDefaultProto [ ,
internalSlotsList ] )
[...]
2. Let proto be ? GetPrototypeFromConstructor(constructor,
intrinsicDefaultProto).
3. Return ObjectCreate(proto, internalSlotsList).
features: [Reflect]
---*/
var callCount = 0;
var Ctor = function() {
callCount += 1;
};
var instance;
instance = Reflect.construct(Date, [64], Ctor);
assert.sameValue(
Object.getPrototypeOf(instance),
Ctor.prototype,
'constructor defines an object `prototype` property'
);
assert.sameValue(callCount, 0, 'constructor not invoked');
assert.sameValue(
Date.prototype.getTime.call(instance),
64,
'proper subclass has a [[DateValue]] slot'
);
Ctor.prototype = null;
instance = Reflect.construct(Date, [64], Ctor);
assert.sameValue(
Object.getPrototypeOf(instance),
Date.prototype,
'constructor does not defines an object `prototype` property'
);
assert.sameValue(callCount, 0, 'constructor not invoked');
assert.sameValue(
instance.getTime(), 64, 'direct instance has a [[DateValue]] slot'
);