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// Copyright 2019 Google Inc. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-initializedatetimeformat
description: >
Checks handling of the options argument to the DateTimeFormat constructor.
info: |
[[DayPeriod]] `"dayPeriod"` `"narrow"`, `"short"`, `"long"`
InitializeDateTimeFormat ( dateTimeFormat, locales, options )
...
features: [Intl.DateTimeFormat-dayPeriod]
---*/
const validOptions = [
[undefined, undefined],
["long", "long"],
["short", "short"],
["narrow", "narrow"],
[{ toString() { return "narrow"; } }, "narrow"],
[{ valueOf() { return "long"; }, toString: undefined }, "long"],
];
for (const [dayPeriod, expected] of validOptions) {
const dtf = new Intl.DateTimeFormat("en", { dayPeriod });
const options = dtf.resolvedOptions();
assert.sameValue(options.dayPeriod, expected);
const propdesc = Object.getOwnPropertyDescriptor(options, "dayPeriod");
if (expected === undefined) {
assert.sameValue(propdesc, undefined);
} else {
assert.sameValue(propdesc.value, expected);
}
}
reportCompare(0, 0);
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