62 lines
2.4 KiB
JavaScript
62 lines
2.4 KiB
JavaScript
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// Copyright 2018 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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const d = new Date(2018, 5, 21); // 2018-06-21
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function checkFormat(locale, options, expected) {
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let df = new Intl.DateTimeFormat(locale, options);
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let resolvedOptions = df.resolvedOptions();
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assertEquals(expected.cal, resolvedOptions.calendar);
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assertEquals(expected.numSys, resolvedOptions.numberingSystem);
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let formattedParts = df.formatToParts(d);
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let formattedReconstructedFromParts = formattedParts.map((part) => part.value)
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.reduce((accumulated, part) => accumulated + part);
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let formatted = df.format(d);
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assertEquals(formatted, formattedReconstructedFromParts);
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assertEquals(expected.types, formattedParts.map((part) => part.type));
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assertEquals(expected.formatted, formatted);
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}
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// Even though the calendar is Chinese, the best pattern search for formatting
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// should be done in the base locale (i.e. en or en-GB instead of
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// en-u-ca-chinese or en-GB-u-ca-chinese). Otherwise, {year: 'numeric'} would
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// results in '35 (wu-su)' where 'wu-su' is the designation for year 35 in the
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// 60-year cycle. See https://github.com/tc39/ecma402/issues/225 .
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[
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["en", "gregory", "latn", "2018"],
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["en-GB", "gregory", "latn", "2018"],
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["en-u-ca-chinese", "chinese", "latn", "35"],
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["en-GB-u-ca-chinese", "chinese", "latn", "35"],
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["en-u-ca-chinese-nu-deva", "chinese", "deva", "३५"],
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["en-GB-u-ca-chinese-nu-deva", "chinese", "deva", "३५"],
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].forEach(function(entry) {
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checkFormat(entry[0], {year: 'numeric'},
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{ cal: entry[1],
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numSys: entry[2],
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formatted: entry[3],
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types: ["year"],
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});
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});
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const enUSTypes = ["month", "literal", "day", "literal", "year"];
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const enGBTypes = ["day", "literal", "month", "literal", "year"];
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[
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["en", "gregory", "latn", "6/21/2018", enUSTypes],
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["en-GB", "gregory", "latn", "21/06/2018", enGBTypes],
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["en-u-nu-deva", "gregory", "deva", "६/२१/२०१८", enUSTypes],
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["en-u-ca-chinese", "chinese", "latn", "5/8/35", enUSTypes],
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["en-GB-u-ca-chinese", "chinese", "latn", "08/05/35", enGBTypes],
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["en-u-ca-chinese-nu-deva", "chinese", "deva", "५/८/३५", enUSTypes],
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].forEach(function(entry) {
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checkFormat(entry[0], {},
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{ cal: entry[1],
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numSys: entry[2],
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formatted: entry[3],
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types: entry[4],
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});
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});
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