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56 lines
1.9 KiB
JavaScript
56 lines
1.9 KiB
JavaScript
// Copyright (C) 2016 the V8 project authors. All rights reserved.
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// This code is governed by the BSD license found in the LICENSE file.
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/*---
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esid: sec-date-value
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description: >
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Exotic `Symbol.toPrimitive` method returns a primitive value other than a
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string
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info: |
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3. If NewTarget is not undefined, then
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a. If Type(value) is Object and value has a [[DateValue]] internal slot, then
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i. Let tv be thisTimeValue(value).
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b. Else,
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i. Let v be ? ToPrimitive(value).
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ii. If Type(v) is String, then
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1. Let tv be the result of parsing v as a date, in exactly the same
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manner as for the parse method (20.3.3.2). If the parse resulted
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in an abrupt completion, tv is the Completion Record.
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ToPrimitive ( input [ , PreferredType ] )
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1. If PreferredType was not passed, let hint be "default".
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2. Else if PreferredType is hint String, let hint be "string".
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3. Else PreferredType is hint Number, let hint be "number".
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4. Let exoticToPrim be ? GetMethod(input, @@toPrimitive).
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5. If exoticToPrim is not undefined, then
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a. Let result be ? Call(exoticToPrim, input, « hint »).
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b. If Type(result) is not Object, return result.
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features: [Symbol.toPrimitive]
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---*/
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var toPrimitive = {};
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var returnValue;
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toPrimitive[Symbol.toPrimitive] = function() {
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return returnValue;
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};
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returnValue = 8;
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assert.sameValue(new Date(toPrimitive).getTime(), 8, 'number');
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returnValue = undefined;
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assert.sameValue(new Date(toPrimitive).getTime(), NaN, 'undefined');
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returnValue = true;
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assert.sameValue(new Date(toPrimitive).getTime(), 1, 'boolean `true`');
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returnValue = false;
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assert.sameValue(new Date(toPrimitive).getTime(), 0, 'boolean `false`');
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returnValue = null;
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assert.sameValue(new Date(toPrimitive).getTime(), 0, 'null');
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returnValue = Symbol.toPrimitive;
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assert.throws(TypeError, function() {
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new Date(toPrimitive);
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}, 'symbol');
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