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

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JavaScript
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// Copyright (C) 2015 André Bargull. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
description: Date constructor called with Date object
info: >
20.3.2.2 Date ( value )
...
3. If NewTarget is not undefined, then
a. If Type(value) is Object and value has a [[DateValue]] internal slot, then
i. Let tv be thisTimeValue(value).
es6id: 20.3.2.2
---*/
var dateValue = 1438560000000;
var oldDate = new Date(dateValue);
oldDate.toString = function() {
$ERROR("toString() method called");
};
oldDate.valueOf = function() {
$ERROR("valueOf() method called");
};
var newDate = new Date(oldDate);
assert.sameValue(newDate.getTime(), dateValue, "Same date value");