48 lines
1.7 KiB
JavaScript
48 lines
1.7 KiB
JavaScript
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// Copyright 2022 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// Test the new Date( date.toLocaleString("en-US")) is not invalid.
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// This is not guaranteed by the standard but many code use that to set the
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// timezone as suggested in
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// https://stackoverflow.com/questions/15141762/how-to-initialize-a-javascript-date-to-a-particular-time-zone
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let d = new Date();
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// https://tc39.es/ecma262/#sec-todatestring
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// 21.4.4.41.4 ToDateString ( tv )
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// 1. If tv is NaN, return "Invalid Date".
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let invalid = "Invalid Date";
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let largestDiff = 25*60*60*1000;
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let garbage = new Date("garbage");
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assertTrue(invalid == garbage);
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assertEquals(NaN, garbage.getTime());
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let d1 = new Date(d.toLocaleString("en-US"));
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assertTrue(d1 != invalid);
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assertTrue(d1.getTime() != NaN);
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// The milliseconds are different between d1 and d.
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assertTrue(Math.abs(d1-d) < 1000);
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// Force a version of date string which have U+202f before AM
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let nnbsp_am = new Date("11/16/2022, 9:04:55\u202fAM");
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assertTrue(nnbsp_am != invalid);
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assertTrue(nnbsp_am.getTime() != NaN);
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// Force a version of date string which have U+202f before PM
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let nnbsp_pm = new Date("11/16/2022, 9:04:55\u202fPM");
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assertTrue(nnbsp_pm != invalid);
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assertTrue(nnbsp_pm.getTime() != NaN);
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let d2 = new Date(d.toLocaleString("en-US", {timeZone: "Asia/Taipei"}));
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assertTrue(d2 != invalid);
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assertTrue(d2.getTime() != NaN);
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// The differences should be within 25 hours.
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assertTrue(Math.abs(d2-d) < largestDiff);
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let d3 = new Date(d.toLocaleString("en-US", {timeZone: "Africa/Lusaka"}));
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assertTrue(d3 != invalid);
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assertTrue(d3.getTime() != NaN);
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// The differences should be within 25 hours.
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assertTrue(Math.abs(d3-d) < largestDiff);
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