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35 lines
1.1 KiB
JavaScript
35 lines
1.1 KiB
JavaScript
// Copyright 2019 Google Inc. 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-initializedatetimeformat
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description: >
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Checks handling of the options argument to the DateTimeFormat constructor.
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info: |
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[[DayPeriod]] `"dayPeriod"` `"narrow"`, `"short"`, `"long"`
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InitializeDateTimeFormat ( dateTimeFormat, locales, options )
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...
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features: [Intl.DateTimeFormat-dayPeriod]
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---*/
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const validOptions = [
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[undefined, undefined],
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["long", "long"],
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["short", "short"],
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["narrow", "narrow"],
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[{ toString() { return "narrow"; } }, "narrow"],
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[{ valueOf() { return "long"; }, toString: undefined }, "long"],
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];
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for (const [dayPeriod, expected] of validOptions) {
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const dtf = new Intl.DateTimeFormat("en", { dayPeriod });
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const options = dtf.resolvedOptions();
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assert.sameValue(options.dayPeriod, expected);
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const propdesc = Object.getOwnPropertyDescriptor(options, "dayPeriod");
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if (expected === undefined) {
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assert.sameValue(propdesc, undefined);
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} else {
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assert.sameValue(propdesc.value, expected);
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}
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}
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