function normalize(actual) {
    // Tolerate different space characters used by different ICU versions.
    // Older ICU uses U+2009 Thin Space in ranges, whereas newer ICU uses
    // regular old U+0020. Let's ignore these differences.
    if (typeof actual === 'string')
        return actual.replaceAll(' ', ' ');
    return actual;
}

function shouldBe(actual, expected) {
    actual = normalize(actual);
    if (actual !== expected)
        throw new Error('bad value: ' + actual + ' expected value: ' + expected);
}

function compareParts(actual, expected) {
    if (actual.length !== expected.length)
        return false;
    for (var i = 0; i < actual.length; ++i) {
        if (normalize(actual[i].type) !== expected[i].type)
            return false;
        if (normalize(actual[i].value) !== expected[i].value)
            return false;
        if (normalize(actual[i].source) !== expected[i].source)
            return false;
    }
    return true;
}

function shouldBeOneOfParts(actual, expectedArray) {
    for (let expected of expectedArray) {
        if (compareParts(actual, expected))
            return;
    }
    for (let part of actual) {
        print(JSON.stringify(part) + ',');
    }
    throw new Error('bad value: ' + actual + ' expected value: ' + expectedArray);
}

function shouldBeParts(actual, expected) {
    shouldBe(actual.length, expected.length);
    for (var i = 0; i < actual.length; ++i) {
        shouldBe(actual[i].type, expected[i].type);
        shouldBe(actual[i].value, expected[i].value);
        shouldBe(actual[i].source, expected[i].source);
    }
}

function shouldThrow(func, errorMessage) {
    var errorThrown = false;
    var error = null;
    try {
        func();
    } catch (e) {
        errorThrown = true;
        error = e;
    }
    if (!errorThrown)
        throw new Error('not thrown');
    if (String(error) !== errorMessage)
        throw new Error(`bad error: ${String(error)}`);
}

function test() {
    let date1 = new Date(Date.UTC(2007, 0, 10, 10, 0, 0));
    let date2 = new Date(Date.UTC(2007, 0, 10, 11, 0, 0));
    let date3 = new Date(Date.UTC(2007, 0, 20, 10, 0, 0));
    let date4 = new Date(Date.UTC(2010, 0, 20, 10, 0, 0));

    let date5 = new Date(Date.UTC(2007, 0, 10, 12, 0, 0));
    let date6 = new Date(Date.UTC(2007, 0, 10, 14, 0, 0));
    let date7 = new Date(Date.UTC(2007, 0, 10, 23, 0, 0));
    let date8 = new Date(Date.UTC(2007, 0, 11, 0, 0, 0));

    // Test three relavant extensions.
    // "nu" NumberingSystem
    let fmt1 = new Intl.DateTimeFormat("en", {
        year: '2-digit',
        month: 'numeric',
        day: 'numeric',
        hour: 'numeric',
        minute: 'numeric',
        timeZone: 'America/Los_Angeles',
        numberingSystem: 'hanidec',
    });
    shouldBe(fmt1.format(date1), `一/一〇/〇七, 二:〇〇 AM`);
    shouldBeParts(fmt1.formatRangeToParts(date1, date2), [
        {"type":"month","value":"一","source":"shared"},
        {"type":"literal","value":"/","source":"shared"},
        {"type":"day","value":"一〇","source":"shared"},
        {"type":"literal","value":"/","source":"shared"},
        {"type":"year","value":"〇七","source":"shared"},
        {"type":"literal","value":", ","source":"shared"},
        {"type":"hour","value":"二","source":"startRange"},
        {"type":"literal","value":":","source":"startRange"},
        {"type":"minute","value":"〇〇","source":"startRange"},
        {"type":"literal","value":" – ","source":"shared"},
        {"type":"hour","value":"三","source":"endRange"},
        {"type":"literal","value":":","source":"endRange"},
        {"type":"minute","value":"〇〇","source":"endRange"},
        {"type":"literal","value":" ","source":"shared"},
        {"type":"dayPeriod","value":"AM","source":"shared"},
    ]);
    shouldBeParts(fmt1.formatRangeToParts(date1, date3), [
        {"type":"month","value":"一","source":"startRange"},
        {"type":"literal","value":"/","source":"startRange"},
        {"type":"day","value":"一〇","source":"startRange"},
        {"type":"literal","value":"/","source":"startRange"},
        {"type":"year","value":"〇七","source":"startRange"},
        {"type":"literal","value":", ","source":"startRange"},
        {"type":"hour","value":"二","source":"startRange"},
        {"type":"literal","value":":","source":"startRange"},
        {"type":"minute","value":"〇〇","source":"startRange"},
        {"type":"literal","value":" ","source":"startRange"},
        {"type":"dayPeriod","value":"AM","source":"startRange"},
        {"type":"literal","value":" – ","source":"shared"},
        {"type":"month","value":"一","source":"endRange"},
        {"type":"literal","value":"/","source":"endRange"},
        {"type":"day","value":"二〇","source":"endRange"},
        {"type":"literal","value":"/","source":"endRange"},
        {"type":"year","value":"〇七","source":"endRange"},
        {"type":"literal","value":", ","source":"endRange"},
        {"type":"hour","value":"二","source":"endRange"},
        {"type":"literal","value":":","source":"endRange"},
        {"type":"minute","value":"〇〇","source":"endRange"},
        {"type":"literal","value":" ","source":"endRange"},
        {"type":"dayPeriod","value":"AM","source":"endRange"},
    ]);

    // "ca" Calendar
    let fmt2 = new Intl.DateTimeFormat("en", {
        year: 'numeric',
        month: 'numeric',
        day: 'numeric',
        hour: 'numeric',
        minute: 'numeric',
        timeZone: 'America/Los_Angeles',
        calendar: 'chinese'
    });
    shouldBe(fmt2.format(date1), `11/22/2006, 2:00 AM`);
    shouldBeParts(fmt2.formatRangeToParts(date1, date2), [
        {"type":"month","value":"11","source":"shared"},
        {"type":"literal","value":"/","source":"shared"},
        {"type":"day","value":"22","source":"shared"},
        {"type":"literal","value":"/","source":"shared"},
        {"type":"relatedYear","value":"2006","source":"shared"},
        {"type":"literal","value":", ","source":"shared"},
        {"type":"hour","value":"2","source":"startRange"},
        {"type":"literal","value":":","source":"startRange"},
        {"type":"minute","value":"00","source":"startRange"},
        {"type":"literal","value":" – ","source":"shared"},
        {"type":"hour","value":"3","source":"endRange"},
        {"type":"literal","value":":","source":"endRange"},
        {"type":"minute","value":"00","source":"endRange"},
        {"type":"literal","value":" ","source":"shared"},
        {"type":"dayPeriod","value":"AM","source":"shared"},
    ]);
    shouldBeParts(fmt2.formatRangeToParts(date1, date3), [
        {"type":"month","value":"11","source":"startRange"},
        {"type":"literal","value":"/","source":"startRange"},
        {"type":"day","value":"22","source":"startRange"},
        {"type":"literal","value":"/","source":"startRange"},
        {"type":"relatedYear","value":"2006","source":"startRange"},
        {"type":"literal","value":", ","source":"startRange"},
        {"type":"hour","value":"2","source":"startRange"},
        {"type":"literal","value":":","source":"startRange"},
        {"type":"minute","value":"00","source":"startRange"},
        {"type":"literal","value":" ","source":"startRange"},
        {"type":"dayPeriod","value":"AM","source":"startRange"},
        {"type":"literal","value":" – ","source":"shared"},
        {"type":"month","value":"12","source":"endRange"},
        {"type":"literal","value":"/","source":"endRange"},
        {"type":"day","value":"2","source":"endRange"},
        {"type":"literal","value":"/","source":"endRange"},
        {"type":"relatedYear","value":"2006","source":"endRange"},
        {"type":"literal","value":", ","source":"endRange"},
        {"type":"hour","value":"2","source":"endRange"},
        {"type":"literal","value":":","source":"endRange"},
        {"type":"minute","value":"00","source":"endRange"},
        {"type":"literal","value":" ","source":"endRange"},
        {"type":"dayPeriod","value":"AM","source":"endRange"},
    ]);

    let fmt3 = new Intl.DateTimeFormat("en", {
        year: 'numeric',
        timeZone: 'America/Los_Angeles',
        calendar: 'chinese'
    });
    shouldBe(fmt3.format(date1), `2006(bing-xu)`);
    shouldBeParts(fmt3.formatRangeToParts(date1, date2), [
        {"type":"relatedYear","value":"2006","source":"shared"},
        {"type":"literal","value":"(","source":"shared"},
        {"type":"yearName","value":"bing-xu","source":"shared"},
        {"type":"literal","value":")","source":"shared"},
    ]);
    shouldBeParts(fmt3.formatRangeToParts(date1, date3), [
        {"type":"relatedYear","value":"2006","source":"shared"},
        {"type":"literal","value":"(","source":"shared"},
        {"type":"yearName","value":"bing-xu","source":"shared"},
        {"type":"literal","value":")","source":"shared"},
    ]);
    shouldBeParts(fmt3.formatRangeToParts(date1, date4), [
        {"type":"relatedYear","value":"2006","source":"startRange"},
        {"type":"literal","value":"(","source":"startRange"},
        {"type":"yearName","value":"bing-xu","source":"startRange"},
        {"type":"literal","value":") – ","source":"shared"},
        {"type":"relatedYear","value":"2009","source":"endRange"},
        {"type":"literal","value":"(","source":"endRange"},
        {"type":"yearName","value":"ji-chou","source":"endRange"},
        {"type":"literal","value":")","source":"shared"},
    ]);

    // Calendar-sensitive format
    let fmt4 = new Intl.DateTimeFormat('en-u-ca-buddhist', {
        year: 'numeric',
        timeZone: 'America/Los_Angeles',
    });
    shouldBe(fmt4.format(date1), `2550 BE`);
    shouldBeParts(fmt4.formatRangeToParts(date1, date2), [
        {"type":"year","value":"2550","source":"shared"},
        {"type":"literal","value":" ","source":"shared"},
        {"type":"era","value":"BE","source":"shared"},
    ]);
    shouldBeParts(fmt4.formatRangeToParts(date1, date3), [
        {"type":"year","value":"2550","source":"shared"},
        {"type":"literal","value":" ","source":"shared"},
        {"type":"era","value":"BE","source":"shared"},
    ]);
    shouldBeParts(fmt4.formatRangeToParts(date1, date4), [
        {"type":"year","value":"2550","source":"startRange"},
        {"type":"literal","value":" – ","source":"shared"},
        {"type":"year","value":"2553","source":"endRange"},
        {"type":"literal","value":" ","source":"shared"},
        {"type":"era","value":"BE","source":"shared"},
    ]);

    // "hc" HourCycle
    let fmt5 = new Intl.DateTimeFormat("en", {
        year: '2-digit',
        month: 'numeric',
        day: 'numeric',
        hour: 'numeric',
        minute: 'numeric',
        timeZone: 'UTC',
        hourCycle: 'h24',
    });
    shouldBe(fmt5.format(date1), `1/10/07, 10:00`);
    shouldBe(fmt5.format(date8), `1/11/07, 24:00`);
    shouldBeParts(fmt5.formatRangeToParts(date1, date2), [
        {"type":"month","value":"1","source":"shared"},
        {"type":"literal","value":"/","source":"shared"},
        {"type":"day","value":"10","source":"shared"},
        {"type":"literal","value":"/","source":"shared"},
        {"type":"year","value":"07","source":"shared"},
        {"type":"literal","value":", ","source":"shared"},
        {"type":"hour","value":"10","source":"startRange"},
        {"type":"literal","value":":","source":"startRange"},
        {"type":"minute","value":"00","source":"startRange"},
        {"type":"literal","value":" – ","source":"shared"},
        {"type":"hour","value":"11","source":"endRange"},
        {"type":"literal","value":":","source":"endRange"},
        {"type":"minute","value":"00","source":"endRange"},
    ]);
    shouldBeParts(fmt5.formatRangeToParts(date1, date3), [
        {"type":"month","value":"1","source":"startRange"},
        {"type":"literal","value":"/","source":"startRange"},
        {"type":"day","value":"10","source":"startRange"},
        {"type":"literal","value":"/","source":"startRange"},
        {"type":"year","value":"07","source":"startRange"},
        {"type":"literal","value":", ","source":"startRange"},
        {"type":"hour","value":"10","source":"startRange"},
        {"type":"literal","value":":","source":"startRange"},
        {"type":"minute","value":"00","source":"startRange"},
        {"type":"literal","value":" – ","source":"shared"},
        {"type":"month","value":"1","source":"endRange"},
        {"type":"literal","value":"/","source":"endRange"},
        {"type":"day","value":"20","source":"endRange"},
        {"type":"literal","value":"/","source":"endRange"},
        {"type":"year","value":"07","source":"endRange"},
        {"type":"literal","value":", ","source":"endRange"},
        {"type":"hour","value":"10","source":"endRange"},
        {"type":"literal","value":":","source":"endRange"},
        {"type":"minute","value":"00","source":"endRange"},
    ]);
    shouldBeParts(fmt5.formatRangeToParts(date1, date5), [
        {"type":"month","value":"1","source":"shared"},
        {"type":"literal","value":"/","source":"shared"},
        {"type":"day","value":"10","source":"shared"},
        {"type":"literal","value":"/","source":"shared"},
        {"type":"year","value":"07","source":"shared"},
        {"type":"literal","value":", ","source":"shared"},
        {"type":"hour","value":"10","source":"startRange"},
        {"type":"literal","value":":","source":"startRange"},
        {"type":"minute","value":"00","source":"startRange"},
        {"type":"literal","value":" – ","source":"shared"},
        {"type":"hour","value":"12","source":"endRange"},
        {"type":"literal","value":":","source":"endRange"},
        {"type":"minute","value":"00","source":"endRange"},
    ]);
    shouldBeParts(fmt5.formatRangeToParts(date1, date6), [
        {"type":"month","value":"1","source":"shared"},
        {"type":"literal","value":"/","source":"shared"},
        {"type":"day","value":"10","source":"shared"},
        {"type":"literal","value":"/","source":"shared"},
        {"type":"year","value":"07","source":"shared"},
        {"type":"literal","value":", ","source":"shared"},
        {"type":"hour","value":"10","source":"startRange"},
        {"type":"literal","value":":","source":"startRange"},
        {"type":"minute","value":"00","source":"startRange"},
        {"type":"literal","value":" – ","source":"shared"},
        {"type":"hour","value":"14","source":"endRange"},
        {"type":"literal","value":":","source":"endRange"},
        {"type":"minute","value":"00","source":"endRange"},
    ]);
    shouldBeParts(fmt5.formatRangeToParts(date1, date7), [
        {"type":"month","value":"1","source":"shared"},
        {"type":"literal","value":"/","source":"shared"},
        {"type":"day","value":"10","source":"shared"},
        {"type":"literal","value":"/","source":"shared"},
        {"type":"year","value":"07","source":"shared"},
        {"type":"literal","value":", ","source":"shared"},
        {"type":"hour","value":"10","source":"startRange"},
        {"type":"literal","value":":","source":"startRange"},
        {"type":"minute","value":"00","source":"startRange"},
        {"type":"literal","value":" – ","source":"shared"},
        {"type":"hour","value":"23","source":"endRange"},
        {"type":"literal","value":":","source":"endRange"},
        {"type":"minute","value":"00","source":"endRange"},
    ]);
    if ($vm.icuVersion() > 66) {
        shouldBeParts(fmt5.formatRangeToParts(date1, date8), [
            {"type":"month","value":"1","source":"startRange"},
            {"type":"literal","value":"/","source":"startRange"},
            {"type":"day","value":"10","source":"startRange"},
            {"type":"literal","value":"/","source":"startRange"},
            {"type":"year","value":"07","source":"startRange"},
            {"type":"literal","value":", ","source":"startRange"},
            {"type":"hour","value":"10","source":"startRange"},
            {"type":"literal","value":":","source":"startRange"},
            {"type":"minute","value":"00","source":"startRange"},
            {"type":"literal","value":" – ","source":"shared"},
            {"type":"month","value":"1","source":"endRange"},
            {"type":"literal","value":"/","source":"endRange"},
            {"type":"day","value":"11","source":"endRange"},
            {"type":"literal","value":"/","source":"endRange"},
            {"type":"year","value":"07","source":"endRange"},
            {"type":"literal","value":", ","source":"endRange"},
            {"type":"hour","value":"24","source":"endRange"},
            {"type":"literal","value":":","source":"endRange"},
            {"type":"minute","value":"00","source":"endRange"},
        ]);
    }

    let fmt6 = new Intl.DateTimeFormat("en", {
        year: '2-digit',
        month: 'numeric',
        day: 'numeric',
        hour: 'numeric',
        minute: 'numeric',
        timeZone: 'UTC',
        hourCycle: 'h23',
    });
    shouldBe(fmt6.format(date1), `1/10/07, 10:00`);
    shouldBe(fmt6.format(date8), `1/11/07, 00:00`);
    shouldBeParts(fmt6.formatRangeToParts(date1, date2), [
        {"type":"month","value":"1","source":"shared"},
        {"type":"literal","value":"/","source":"shared"},
        {"type":"day","value":"10","source":"shared"},
        {"type":"literal","value":"/","source":"shared"},
        {"type":"year","value":"07","source":"shared"},
        {"type":"literal","value":", ","source":"shared"},
        {"type":"hour","value":"10","source":"startRange"},
        {"type":"literal","value":":","source":"startRange"},
        {"type":"minute","value":"00","source":"startRange"},
        {"type":"literal","value":" – ","source":"shared"},
        {"type":"hour","value":"11","source":"endRange"},
        {"type":"literal","value":":","source":"endRange"},
        {"type":"minute","value":"00","source":"endRange"},
    ]);
    shouldBeParts(fmt6.formatRangeToParts(date1, date3), [
        {"type":"month","value":"1","source":"startRange"},
        {"type":"literal","value":"/","source":"startRange"},
        {"type":"day","value":"10","source":"startRange"},
        {"type":"literal","value":"/","source":"startRange"},
        {"type":"year","value":"07","source":"startRange"},
        {"type":"literal","value":", ","source":"startRange"},
        {"type":"hour","value":"10","source":"startRange"},
        {"type":"literal","value":":","source":"startRange"},
        {"type":"minute","value":"00","source":"startRange"},
        {"type":"literal","value":" – ","source":"shared"},
        {"type":"month","value":"1","source":"endRange"},
        {"type":"literal","value":"/","source":"endRange"},
        {"type":"day","value":"20","source":"endRange"},
        {"type":"literal","value":"/","source":"endRange"},
        {"type":"year","value":"07","source":"endRange"},
        {"type":"literal","value":", ","source":"endRange"},
        {"type":"hour","value":"10","source":"endRange"},
        {"type":"literal","value":":","source":"endRange"},
        {"type":"minute","value":"00","source":"endRange"},
    ]);
    shouldBeParts(fmt6.formatRangeToParts(date1, date5), [
        {"type":"month","value":"1","source":"shared"},
        {"type":"literal","value":"/","source":"shared"},
        {"type":"day","value":"10","source":"shared"},
        {"type":"literal","value":"/","source":"shared"},
        {"type":"year","value":"07","source":"shared"},
        {"type":"literal","value":", ","source":"shared"},
        {"type":"hour","value":"10","source":"startRange"},
        {"type":"literal","value":":","source":"startRange"},
        {"type":"minute","value":"00","source":"startRange"},
        {"type":"literal","value":" – ","source":"shared"},
        {"type":"hour","value":"12","source":"endRange"},
        {"type":"literal","value":":","source":"endRange"},
        {"type":"minute","value":"00","source":"endRange"},
    ]);
    shouldBeParts(fmt6.formatRangeToParts(date1, date6), [
        {"type":"month","value":"1","source":"shared"},
        {"type":"literal","value":"/","source":"shared"},
        {"type":"day","value":"10","source":"shared"},
        {"type":"literal","value":"/","source":"shared"},
        {"type":"year","value":"07","source":"shared"},
        {"type":"literal","value":", ","source":"shared"},
        {"type":"hour","value":"10","source":"startRange"},
        {"type":"literal","value":":","source":"startRange"},
        {"type":"minute","value":"00","source":"startRange"},
        {"type":"literal","value":" – ","source":"shared"},
        {"type":"hour","value":"14","source":"endRange"},
        {"type":"literal","value":":","source":"endRange"},
        {"type":"minute","value":"00","source":"endRange"},
    ]);
    shouldBeParts(fmt6.formatRangeToParts(date1, date7), [
        {"type":"month","value":"1","source":"shared"},
        {"type":"literal","value":"/","source":"shared"},
        {"type":"day","value":"10","source":"shared"},
        {"type":"literal","value":"/","source":"shared"},
        {"type":"year","value":"07","source":"shared"},
        {"type":"literal","value":", ","source":"shared"},
        {"type":"hour","value":"10","source":"startRange"},
        {"type":"literal","value":":","source":"startRange"},
        {"type":"minute","value":"00","source":"startRange"},
        {"type":"literal","value":" – ","source":"shared"},
        {"type":"hour","value":"23","source":"endRange"},
        {"type":"literal","value":":","source":"endRange"},
        {"type":"minute","value":"00","source":"endRange"},
    ]);
    shouldBeParts(fmt6.formatRangeToParts(date1, date8), [
        {"type":"month","value":"1","source":"startRange"},
        {"type":"literal","value":"/","source":"startRange"},
        {"type":"day","value":"10","source":"startRange"},
        {"type":"literal","value":"/","source":"startRange"},
        {"type":"year","value":"07","source":"startRange"},
        {"type":"literal","value":", ","source":"startRange"},
        {"type":"hour","value":"10","source":"startRange"},
        {"type":"literal","value":":","source":"startRange"},
        {"type":"minute","value":"00","source":"startRange"},
        {"type":"literal","value":" – ","source":"shared"},
        {"type":"month","value":"1","source":"endRange"},
        {"type":"literal","value":"/","source":"endRange"},
        {"type":"day","value":"11","source":"endRange"},
        {"type":"literal","value":"/","source":"endRange"},
        {"type":"year","value":"07","source":"endRange"},
        {"type":"literal","value":", ","source":"endRange"},
        {"type":"hour","value":"00","source":"endRange"},
        {"type":"literal","value":":","source":"endRange"},
        {"type":"minute","value":"00","source":"endRange"},
    ]);

    let fmt7 = new Intl.DateTimeFormat("en", {
        year: '2-digit',
        month: 'numeric',
        day: 'numeric',
        hour: 'numeric',
        minute: 'numeric',
        timeZone: 'UTC',
        hourCycle: 'h11',
    });
    shouldBe(fmt7.format(date1), `1/10/07, 10:00 AM`);
    shouldBe(fmt7.format(date8), `1/11/07, 0:00 AM`);
    shouldBeOneOfParts(fmt7.formatRangeToParts(date1, date2),
        [
            [
                {"type":"month","value":"1","source":"shared"},
                {"type":"literal","value":"/","source":"shared"},
                {"type":"day","value":"10","source":"shared"},
                {"type":"literal","value":"/","source":"shared"},
                {"type":"year","value":"07","source":"shared"},
                {"type":"literal","value":", ","source":"shared"},
                {"type":"hour","value":"10","source":"startRange"},
                {"type":"literal","value":":","source":"startRange"},
                {"type":"minute","value":"00","source":"startRange"},
                {"type":"literal","value":" ","source":"startRange"},
                {"type":"dayPeriod","value":"AM","source":"startRange"},
                {"type":"literal","value":" – ","source":"shared"},
                {"type":"hour","value":"11","source":"endRange"},
                {"type":"literal","value":":","source":"endRange"},
                {"type":"minute","value":"00","source":"endRange"},
                {"type":"literal","value":" ","source":"endRange"},
                {"type":"dayPeriod","value":"AM","source":"endRange"},
            ],
            [
                {"type":"month","value":"1","source":"shared"},
                {"type":"literal","value":"/","source":"shared"},
                {"type":"day","value":"10","source":"shared"},
                {"type":"literal","value":"/","source":"shared"},
                {"type":"year","value":"07","source":"shared"},
                {"type":"literal","value":", ","source":"shared"},
                {"type":"hour","value":"10","source":"startRange"},
                {"type":"literal","value":":","source":"startRange"},
                {"type":"minute","value":"00","source":"startRange"},
                {"type":"literal","value":" – ","source":"shared"},
                {"type":"hour","value":"11","source":"endRange"},
                {"type":"literal","value":":","source":"endRange"},
                {"type":"minute","value":"00","source":"endRange"},
                {"type":"literal","value":" ","source":"shared"},
                {"type":"dayPeriod","value":"AM","source":"shared"},
            ]
        ]
    );
    shouldBeParts(fmt7.formatRangeToParts(date1, date3), [
        {"type":"month","value":"1","source":"startRange"},
        {"type":"literal","value":"/","source":"startRange"},
        {"type":"day","value":"10","source":"startRange"},
        {"type":"literal","value":"/","source":"startRange"},
        {"type":"year","value":"07","source":"startRange"},
        {"type":"literal","value":", ","source":"startRange"},
        {"type":"hour","value":"10","source":"startRange"},
        {"type":"literal","value":":","source":"startRange"},
        {"type":"minute","value":"00","source":"startRange"},
        {"type":"literal","value":" ","source":"startRange"},
        {"type":"dayPeriod","value":"AM","source":"startRange"},
        {"type":"literal","value":" – ","source":"shared"},
        {"type":"month","value":"1","source":"endRange"},
        {"type":"literal","value":"/","source":"endRange"},
        {"type":"day","value":"20","source":"endRange"},
        {"type":"literal","value":"/","source":"endRange"},
        {"type":"year","value":"07","source":"endRange"},
        {"type":"literal","value":", ","source":"endRange"},
        {"type":"hour","value":"10","source":"endRange"},
        {"type":"literal","value":":","source":"endRange"},
        {"type":"minute","value":"00","source":"endRange"},
        {"type":"literal","value":" ","source":"endRange"},
        {"type":"dayPeriod","value":"AM","source":"endRange"},
    ]);
    if ($vm.icuVersion() > 66) {
        shouldBeParts(fmt7.formatRangeToParts(date1, date5), [
            {"type":"month","value":"1","source":"shared"},
            {"type":"literal","value":"/","source":"shared"},
            {"type":"day","value":"10","source":"shared"},
            {"type":"literal","value":"/","source":"shared"},
            {"type":"year","value":"07","source":"shared"},
            {"type":"literal","value":", ","source":"shared"},
            {"type":"hour","value":"10","source":"startRange"},
            {"type":"literal","value":":","source":"startRange"},
            {"type":"minute","value":"00","source":"startRange"},
            {"type":"literal","value":" ","source":"startRange"},
            {"type":"dayPeriod","value":"AM","source":"startRange"},
            {"type":"literal","value":" – ","source":"shared"},
            {"type":"hour","value":"0","source":"endRange"},
            {"type":"literal","value":":","source":"endRange"},
            {"type":"minute","value":"00","source":"endRange"},
            {"type":"literal","value":" ","source":"endRange"},
            {"type":"dayPeriod","value":"PM","source":"endRange"},
        ]);
    }
    shouldBeParts(fmt7.formatRangeToParts(date1, date6), [
        {"type":"month","value":"1","source":"shared"},
        {"type":"literal","value":"/","source":"shared"},
        {"type":"day","value":"10","source":"shared"},
        {"type":"literal","value":"/","source":"shared"},
        {"type":"year","value":"07","source":"shared"},
        {"type":"literal","value":", ","source":"shared"},
        {"type":"hour","value":"10","source":"startRange"},
        {"type":"literal","value":":","source":"startRange"},
        {"type":"minute","value":"00","source":"startRange"},
        {"type":"literal","value":" ","source":"startRange"},
        {"type":"dayPeriod","value":"AM","source":"startRange"},
        {"type":"literal","value":" – ","source":"shared"},
        {"type":"hour","value":"2","source":"endRange"},
        {"type":"literal","value":":","source":"endRange"},
        {"type":"minute","value":"00","source":"endRange"},
        {"type":"literal","value":" ","source":"endRange"},
        {"type":"dayPeriod","value":"PM","source":"endRange"},
    ]);
    shouldBeParts(fmt7.formatRangeToParts(date1, date7), [
        {"type":"month","value":"1","source":"shared"},
        {"type":"literal","value":"/","source":"shared"},
        {"type":"day","value":"10","source":"shared"},
        {"type":"literal","value":"/","source":"shared"},
        {"type":"year","value":"07","source":"shared"},
        {"type":"literal","value":", ","source":"shared"},
        {"type":"hour","value":"10","source":"startRange"},
        {"type":"literal","value":":","source":"startRange"},
        {"type":"minute","value":"00","source":"startRange"},
        {"type":"literal","value":" ","source":"startRange"},
        {"type":"dayPeriod","value":"AM","source":"startRange"},
        {"type":"literal","value":" – ","source":"shared"},
        {"type":"hour","value":"11","source":"endRange"},
        {"type":"literal","value":":","source":"endRange"},
        {"type":"minute","value":"00","source":"endRange"},
        {"type":"literal","value":" ","source":"endRange"},
        {"type":"dayPeriod","value":"PM","source":"endRange"},
    ]);
    if ($vm.icuVersion() > 66) {
        shouldBeParts(fmt7.formatRangeToParts(date1, date8), [
            {"type":"month","value":"1","source":"startRange"},
            {"type":"literal","value":"/","source":"startRange"},
            {"type":"day","value":"10","source":"startRange"},
            {"type":"literal","value":"/","source":"startRange"},
            {"type":"year","value":"07","source":"startRange"},
            {"type":"literal","value":", ","source":"startRange"},
            {"type":"hour","value":"10","source":"startRange"},
            {"type":"literal","value":":","source":"startRange"},
            {"type":"minute","value":"00","source":"startRange"},
            {"type":"literal","value":" ","source":"startRange"},
            {"type":"dayPeriod","value":"AM","source":"startRange"},
            {"type":"literal","value":" – ","source":"shared"},
            {"type":"month","value":"1","source":"endRange"},
            {"type":"literal","value":"/","source":"endRange"},
            {"type":"day","value":"11","source":"endRange"},
            {"type":"literal","value":"/","source":"endRange"},
            {"type":"year","value":"07","source":"endRange"},
            {"type":"literal","value":", ","source":"endRange"},
            {"type":"hour","value":"0","source":"endRange"},
            {"type":"literal","value":":","source":"endRange"},
            {"type":"minute","value":"00","source":"endRange"},
            {"type":"literal","value":" ","source":"endRange"},
            {"type":"dayPeriod","value":"AM","source":"endRange"},
        ]);
    }

    let fmt8 = new Intl.DateTimeFormat("en", {
        year: '2-digit',
        month: 'numeric',
        day: 'numeric',
        hour: 'numeric',
        minute: 'numeric',
        timeZone: 'UTC',
        hourCycle: 'h12',
    });
    shouldBe(fmt8.format(date1), `1/10/07, 10:00 AM`);
    shouldBe(fmt8.format(date8), `1/11/07, 12:00 AM`);
    shouldBeParts(fmt8.formatRangeToParts(date1, date2), [
        {"type":"month","value":"1","source":"shared"},
        {"type":"literal","value":"/","source":"shared"},
        {"type":"day","value":"10","source":"shared"},
        {"type":"literal","value":"/","source":"shared"},
        {"type":"year","value":"07","source":"shared"},
        {"type":"literal","value":", ","source":"shared"},
        {"type":"hour","value":"10","source":"startRange"},
        {"type":"literal","value":":","source":"startRange"},
        {"type":"minute","value":"00","source":"startRange"},
        {"type":"literal","value":" – ","source":"shared"},
        {"type":"hour","value":"11","source":"endRange"},
        {"type":"literal","value":":","source":"endRange"},
        {"type":"minute","value":"00","source":"endRange"},
        {"type":"literal","value":" ","source":"shared"},
        {"type":"dayPeriod","value":"AM","source":"shared"},
    ]);
    shouldBeParts(fmt8.formatRangeToParts(date1, date3), [
        {"type":"month","value":"1","source":"startRange"},
        {"type":"literal","value":"/","source":"startRange"},
        {"type":"day","value":"10","source":"startRange"},
        {"type":"literal","value":"/","source":"startRange"},
        {"type":"year","value":"07","source":"startRange"},
        {"type":"literal","value":", ","source":"startRange"},
        {"type":"hour","value":"10","source":"startRange"},
        {"type":"literal","value":":","source":"startRange"},
        {"type":"minute","value":"00","source":"startRange"},
        {"type":"literal","value":" ","source":"startRange"},
        {"type":"dayPeriod","value":"AM","source":"startRange"},
        {"type":"literal","value":" – ","source":"shared"},
        {"type":"month","value":"1","source":"endRange"},
        {"type":"literal","value":"/","source":"endRange"},
        {"type":"day","value":"20","source":"endRange"},
        {"type":"literal","value":"/","source":"endRange"},
        {"type":"year","value":"07","source":"endRange"},
        {"type":"literal","value":", ","source":"endRange"},
        {"type":"hour","value":"10","source":"endRange"},
        {"type":"literal","value":":","source":"endRange"},
        {"type":"minute","value":"00","source":"endRange"},
        {"type":"literal","value":" ","source":"endRange"},
        {"type":"dayPeriod","value":"AM","source":"endRange"},
    ]);
    shouldBeParts(fmt8.formatRangeToParts(date1, date5), [
        {"type":"month","value":"1","source":"shared"},
        {"type":"literal","value":"/","source":"shared"},
        {"type":"day","value":"10","source":"shared"},
        {"type":"literal","value":"/","source":"shared"},
        {"type":"year","value":"07","source":"shared"},
        {"type":"literal","value":", ","source":"shared"},
        {"type":"hour","value":"10","source":"startRange"},
        {"type":"literal","value":":","source":"startRange"},
        {"type":"minute","value":"00","source":"startRange"},
        {"type":"literal","value":" ","source":"startRange"},
        {"type":"dayPeriod","value":"AM","source":"startRange"},
        {"type":"literal","value":" – ","source":"shared"},
        {"type":"hour","value":"12","source":"endRange"},
        {"type":"literal","value":":","source":"endRange"},
        {"type":"minute","value":"00","source":"endRange"},
        {"type":"literal","value":" ","source":"endRange"},
        {"type":"dayPeriod","value":"PM","source":"endRange"},
    ]);
    shouldBeParts(fmt8.formatRangeToParts(date1, date6), [
        {"type":"month","value":"1","source":"shared"},
        {"type":"literal","value":"/","source":"shared"},
        {"type":"day","value":"10","source":"shared"},
        {"type":"literal","value":"/","source":"shared"},
        {"type":"year","value":"07","source":"shared"},
        {"type":"literal","value":", ","source":"shared"},
        {"type":"hour","value":"10","source":"startRange"},
        {"type":"literal","value":":","source":"startRange"},
        {"type":"minute","value":"00","source":"startRange"},
        {"type":"literal","value":" ","source":"startRange"},
        {"type":"dayPeriod","value":"AM","source":"startRange"},
        {"type":"literal","value":" – ","source":"shared"},
        {"type":"hour","value":"2","source":"endRange"},
        {"type":"literal","value":":","source":"endRange"},
        {"type":"minute","value":"00","source":"endRange"},
        {"type":"literal","value":" ","source":"endRange"},
        {"type":"dayPeriod","value":"PM","source":"endRange"},
    ]);
    shouldBeParts(fmt8.formatRangeToParts(date1, date7), [
        {"type":"month","value":"1","source":"shared"},
        {"type":"literal","value":"/","source":"shared"},
        {"type":"day","value":"10","source":"shared"},
        {"type":"literal","value":"/","source":"shared"},
        {"type":"year","value":"07","source":"shared"},
        {"type":"literal","value":", ","source":"shared"},
        {"type":"hour","value":"10","source":"startRange"},
        {"type":"literal","value":":","source":"startRange"},
        {"type":"minute","value":"00","source":"startRange"},
        {"type":"literal","value":" ","source":"startRange"},
        {"type":"dayPeriod","value":"AM","source":"startRange"},
        {"type":"literal","value":" – ","source":"shared"},
        {"type":"hour","value":"11","source":"endRange"},
        {"type":"literal","value":":","source":"endRange"},
        {"type":"minute","value":"00","source":"endRange"},
        {"type":"literal","value":" ","source":"endRange"},
        {"type":"dayPeriod","value":"PM","source":"endRange"},
    ]);
    shouldBeParts(fmt8.formatRangeToParts(date1, date8), [
        {"type":"month","value":"1","source":"startRange"},
        {"type":"literal","value":"/","source":"startRange"},
        {"type":"day","value":"10","source":"startRange"},
        {"type":"literal","value":"/","source":"startRange"},
        {"type":"year","value":"07","source":"startRange"},
        {"type":"literal","value":", ","source":"startRange"},
        {"type":"hour","value":"10","source":"startRange"},
        {"type":"literal","value":":","source":"startRange"},
        {"type":"minute","value":"00","source":"startRange"},
        {"type":"literal","value":" ","source":"startRange"},
        {"type":"dayPeriod","value":"AM","source":"startRange"},
        {"type":"literal","value":" – ","source":"shared"},
        {"type":"month","value":"1","source":"endRange"},
        {"type":"literal","value":"/","source":"endRange"},
        {"type":"day","value":"11","source":"endRange"},
        {"type":"literal","value":"/","source":"endRange"},
        {"type":"year","value":"07","source":"endRange"},
        {"type":"literal","value":", ","source":"endRange"},
        {"type":"hour","value":"12","source":"endRange"},
        {"type":"literal","value":":","source":"endRange"},
        {"type":"minute","value":"00","source":"endRange"},
        {"type":"literal","value":" ","source":"endRange"},
        {"type":"dayPeriod","value":"AM","source":"endRange"},
    ]);

    // "hc" + hour 2-digit
    let fmt9 = new Intl.DateTimeFormat("en", {
        year: '2-digit',
        month: 'numeric',
        day: 'numeric',
        hour: '2-digit',
        minute: 'numeric',
        timeZone: 'UTC',
        hourCycle: 'h24',
    });
    shouldBe(fmt9.format(date1), `1/10/07, 10:00`);
    shouldBe(fmt9.format(date8), `1/11/07, 24:00`);
    shouldBeParts(fmt9.formatRangeToParts(date1, date2), [
        {"type":"month","value":"1","source":"shared"},
        {"type":"literal","value":"/","source":"shared"},
        {"type":"day","value":"10","source":"shared"},
        {"type":"literal","value":"/","source":"shared"},
        {"type":"year","value":"07","source":"shared"},
        {"type":"literal","value":", ","source":"shared"},
        {"type":"hour","value":"10","source":"startRange"},
        {"type":"literal","value":":","source":"startRange"},
        {"type":"minute","value":"00","source":"startRange"},
        {"type":"literal","value":" – ","source":"shared"},
        {"type":"hour","value":"11","source":"endRange"},
        {"type":"literal","value":":","source":"endRange"},
        {"type":"minute","value":"00","source":"endRange"},
    ]);
    shouldBeParts(fmt9.formatRangeToParts(date1, date3), [
        {"type":"month","value":"1","source":"startRange"},
        {"type":"literal","value":"/","source":"startRange"},
        {"type":"day","value":"10","source":"startRange"},
        {"type":"literal","value":"/","source":"startRange"},
        {"type":"year","value":"07","source":"startRange"},
        {"type":"literal","value":", ","source":"startRange"},
        {"type":"hour","value":"10","source":"startRange"},
        {"type":"literal","value":":","source":"startRange"},
        {"type":"minute","value":"00","source":"startRange"},
        {"type":"literal","value":" – ","source":"shared"},
        {"type":"month","value":"1","source":"endRange"},
        {"type":"literal","value":"/","source":"endRange"},
        {"type":"day","value":"20","source":"endRange"},
        {"type":"literal","value":"/","source":"endRange"},
        {"type":"year","value":"07","source":"endRange"},
        {"type":"literal","value":", ","source":"endRange"},
        {"type":"hour","value":"10","source":"endRange"},
        {"type":"literal","value":":","source":"endRange"},
        {"type":"minute","value":"00","source":"endRange"},
    ]);
    shouldBeParts(fmt9.formatRangeToParts(date1, date5), [
        {"type":"month","value":"1","source":"shared"},
        {"type":"literal","value":"/","source":"shared"},
        {"type":"day","value":"10","source":"shared"},
        {"type":"literal","value":"/","source":"shared"},
        {"type":"year","value":"07","source":"shared"},
        {"type":"literal","value":", ","source":"shared"},
        {"type":"hour","value":"10","source":"startRange"},
        {"type":"literal","value":":","source":"startRange"},
        {"type":"minute","value":"00","source":"startRange"},
        {"type":"literal","value":" – ","source":"shared"},
        {"type":"hour","value":"12","source":"endRange"},
        {"type":"literal","value":":","source":"endRange"},
        {"type":"minute","value":"00","source":"endRange"},
    ]);
    shouldBeParts(fmt9.formatRangeToParts(date1, date6), [
        {"type":"month","value":"1","source":"shared"},
        {"type":"literal","value":"/","source":"shared"},
        {"type":"day","value":"10","source":"shared"},
        {"type":"literal","value":"/","source":"shared"},
        {"type":"year","value":"07","source":"shared"},
        {"type":"literal","value":", ","source":"shared"},
        {"type":"hour","value":"10","source":"startRange"},
        {"type":"literal","value":":","source":"startRange"},
        {"type":"minute","value":"00","source":"startRange"},
        {"type":"literal","value":" – ","source":"shared"},
        {"type":"hour","value":"14","source":"endRange"},
        {"type":"literal","value":":","source":"endRange"},
        {"type":"minute","value":"00","source":"endRange"},
    ]);
    shouldBeParts(fmt9.formatRangeToParts(date1, date7), [
        {"type":"month","value":"1","source":"shared"},
        {"type":"literal","value":"/","source":"shared"},
        {"type":"day","value":"10","source":"shared"},
        {"type":"literal","value":"/","source":"shared"},
        {"type":"year","value":"07","source":"shared"},
        {"type":"literal","value":", ","source":"shared"},
        {"type":"hour","value":"10","source":"startRange"},
        {"type":"literal","value":":","source":"startRange"},
        {"type":"minute","value":"00","source":"startRange"},
        {"type":"literal","value":" – ","source":"shared"},
        {"type":"hour","value":"23","source":"endRange"},
        {"type":"literal","value":":","source":"endRange"},
        {"type":"minute","value":"00","source":"endRange"},
    ]);
    if ($vm.icuVersion() > 66) {
        shouldBeParts(fmt9.formatRangeToParts(date1, date8), [
            {"type":"month","value":"1","source":"startRange"},
            {"type":"literal","value":"/","source":"startRange"},
            {"type":"day","value":"10","source":"startRange"},
            {"type":"literal","value":"/","source":"startRange"},
            {"type":"year","value":"07","source":"startRange"},
            {"type":"literal","value":", ","source":"startRange"},
            {"type":"hour","value":"10","source":"startRange"},
            {"type":"literal","value":":","source":"startRange"},
            {"type":"minute","value":"00","source":"startRange"},
            {"type":"literal","value":" – ","source":"shared"},
            {"type":"month","value":"1","source":"endRange"},
            {"type":"literal","value":"/","source":"endRange"},
            {"type":"day","value":"11","source":"endRange"},
            {"type":"literal","value":"/","source":"endRange"},
            {"type":"year","value":"07","source":"endRange"},
            {"type":"literal","value":", ","source":"endRange"},
            {"type":"hour","value":"24","source":"endRange"},
            {"type":"literal","value":":","source":"endRange"},
            {"type":"minute","value":"00","source":"endRange"},
        ]);
    }

    let fmt10 = new Intl.DateTimeFormat("en", {
        year: '2-digit',
        month: 'numeric',
        day: 'numeric',
        hour: '2-digit',
        minute: 'numeric',
        timeZone: 'UTC',
        hourCycle: 'h23',
    });
    shouldBe(fmt10.format(date1), `1/10/07, 10:00`);
    shouldBe(fmt10.format(date8), `1/11/07, 00:00`);
    shouldBeParts(fmt10.formatRangeToParts(date1, date2), [
        {"type":"month","value":"1","source":"shared"},
        {"type":"literal","value":"/","source":"shared"},
        {"type":"day","value":"10","source":"shared"},
        {"type":"literal","value":"/","source":"shared"},
        {"type":"year","value":"07","source":"shared"},
        {"type":"literal","value":", ","source":"shared"},
        {"type":"hour","value":"10","source":"startRange"},
        {"type":"literal","value":":","source":"startRange"},
        {"type":"minute","value":"00","source":"startRange"},
        {"type":"literal","value":" – ","source":"shared"},
        {"type":"hour","value":"11","source":"endRange"},
        {"type":"literal","value":":","source":"endRange"},
        {"type":"minute","value":"00","source":"endRange"},
    ]);
    shouldBeParts(fmt10.formatRangeToParts(date1, date3), [
        {"type":"month","value":"1","source":"startRange"},
        {"type":"literal","value":"/","source":"startRange"},
        {"type":"day","value":"10","source":"startRange"},
        {"type":"literal","value":"/","source":"startRange"},
        {"type":"year","value":"07","source":"startRange"},
        {"type":"literal","value":", ","source":"startRange"},
        {"type":"hour","value":"10","source":"startRange"},
        {"type":"literal","value":":","source":"startRange"},
        {"type":"minute","value":"00","source":"startRange"},
        {"type":"literal","value":" – ","source":"shared"},
        {"type":"month","value":"1","source":"endRange"},
        {"type":"literal","value":"/","source":"endRange"},
        {"type":"day","value":"20","source":"endRange"},
        {"type":"literal","value":"/","source":"endRange"},
        {"type":"year","value":"07","source":"endRange"},
        {"type":"literal","value":", ","source":"endRange"},
        {"type":"hour","value":"10","source":"endRange"},
        {"type":"literal","value":":","source":"endRange"},
        {"type":"minute","value":"00","source":"endRange"},
    ]);
    shouldBeParts(fmt10.formatRangeToParts(date1, date5), [
        {"type":"month","value":"1","source":"shared"},
        {"type":"literal","value":"/","source":"shared"},
        {"type":"day","value":"10","source":"shared"},
        {"type":"literal","value":"/","source":"shared"},
        {"type":"year","value":"07","source":"shared"},
        {"type":"literal","value":", ","source":"shared"},
        {"type":"hour","value":"10","source":"startRange"},
        {"type":"literal","value":":","source":"startRange"},
        {"type":"minute","value":"00","source":"startRange"},
        {"type":"literal","value":" – ","source":"shared"},
        {"type":"hour","value":"12","source":"endRange"},
        {"type":"literal","value":":","source":"endRange"},
        {"type":"minute","value":"00","source":"endRange"},
    ]);
    shouldBeParts(fmt10.formatRangeToParts(date1, date6), [
        {"type":"month","value":"1","source":"shared"},
        {"type":"literal","value":"/","source":"shared"},
        {"type":"day","value":"10","source":"shared"},
        {"type":"literal","value":"/","source":"shared"},
        {"type":"year","value":"07","source":"shared"},
        {"type":"literal","value":", ","source":"shared"},
        {"type":"hour","value":"10","source":"startRange"},
        {"type":"literal","value":":","source":"startRange"},
        {"type":"minute","value":"00","source":"startRange"},
        {"type":"literal","value":" – ","source":"shared"},
        {"type":"hour","value":"14","source":"endRange"},
        {"type":"literal","value":":","source":"endRange"},
        {"type":"minute","value":"00","source":"endRange"},
    ]);
    shouldBeParts(fmt10.formatRangeToParts(date1, date7), [
        {"type":"month","value":"1","source":"shared"},
        {"type":"literal","value":"/","source":"shared"},
        {"type":"day","value":"10","source":"shared"},
        {"type":"literal","value":"/","source":"shared"},
        {"type":"year","value":"07","source":"shared"},
        {"type":"literal","value":", ","source":"shared"},
        {"type":"hour","value":"10","source":"startRange"},
        {"type":"literal","value":":","source":"startRange"},
        {"type":"minute","value":"00","source":"startRange"},
        {"type":"literal","value":" – ","source":"shared"},
        {"type":"hour","value":"23","source":"endRange"},
        {"type":"literal","value":":","source":"endRange"},
        {"type":"minute","value":"00","source":"endRange"},
    ]);
    shouldBeParts(fmt10.formatRangeToParts(date1, date8), [
        {"type":"month","value":"1","source":"startRange"},
        {"type":"literal","value":"/","source":"startRange"},
        {"type":"day","value":"10","source":"startRange"},
        {"type":"literal","value":"/","source":"startRange"},
        {"type":"year","value":"07","source":"startRange"},
        {"type":"literal","value":", ","source":"startRange"},
        {"type":"hour","value":"10","source":"startRange"},
        {"type":"literal","value":":","source":"startRange"},
        {"type":"minute","value":"00","source":"startRange"},
        {"type":"literal","value":" – ","source":"shared"},
        {"type":"month","value":"1","source":"endRange"},
        {"type":"literal","value":"/","source":"endRange"},
        {"type":"day","value":"11","source":"endRange"},
        {"type":"literal","value":"/","source":"endRange"},
        {"type":"year","value":"07","source":"endRange"},
        {"type":"literal","value":", ","source":"endRange"},
        {"type":"hour","value":"00","source":"endRange"},
        {"type":"literal","value":":","source":"endRange"},
        {"type":"minute","value":"00","source":"endRange"},
    ]);

    let fmt11 = new Intl.DateTimeFormat("en", {
        year: '2-digit',
        month: 'numeric',
        day: 'numeric',
        hour: '2-digit',
        minute: 'numeric',
        timeZone: 'UTC',
        hourCycle: 'h11',
    });
    shouldBe(fmt11.format(date1), `1/10/07, 10:00 AM`);
    shouldBe(fmt11.format(date8), `1/11/07, 00:00 AM`);
    shouldBeOneOfParts(fmt11.formatRangeToParts(date1, date2),
        [
            [
                {"type":"month","value":"1","source":"shared"},
                {"type":"literal","value":"/","source":"shared"},
                {"type":"day","value":"10","source":"shared"},
                {"type":"literal","value":"/","source":"shared"},
                {"type":"year","value":"07","source":"shared"},
                {"type":"literal","value":", ","source":"shared"},
                {"type":"hour","value":"10","source":"startRange"},
                {"type":"literal","value":":","source":"startRange"},
                {"type":"minute","value":"00","source":"startRange"},
                {"type":"literal","value":" ","source":"startRange"},
                {"type":"dayPeriod","value":"AM","source":"startRange"},
                {"type":"literal","value":" – ","source":"shared"},
                {"type":"hour","value":"11","source":"endRange"},
                {"type":"literal","value":":","source":"endRange"},
                {"type":"minute","value":"00","source":"endRange"},
                {"type":"literal","value":" ","source":"endRange"},
                {"type":"dayPeriod","value":"AM","source":"endRange"},
            ],
            [
                {"type":"month","value":"1","source":"shared"},
                {"type":"literal","value":"/","source":"shared"},
                {"type":"day","value":"10","source":"shared"},
                {"type":"literal","value":"/","source":"shared"},
                {"type":"year","value":"07","source":"shared"},
                {"type":"literal","value":", ","source":"shared"},
                {"type":"hour","value":"10","source":"startRange"},
                {"type":"literal","value":":","source":"startRange"},
                {"type":"minute","value":"00","source":"startRange"},
                {"type":"literal","value":" – ","source":"shared"},
                {"type":"hour","value":"11","source":"endRange"},
                {"type":"literal","value":":","source":"endRange"},
                {"type":"minute","value":"00","source":"endRange"},
                {"type":"literal","value":" ","source":"shared"},
                {"type":"dayPeriod","value":"AM","source":"shared"},
            ]
        ]
    );
    shouldBeParts(fmt11.formatRangeToParts(date1, date3), [
        {"type":"month","value":"1","source":"startRange"},
        {"type":"literal","value":"/","source":"startRange"},
        {"type":"day","value":"10","source":"startRange"},
        {"type":"literal","value":"/","source":"startRange"},
        {"type":"year","value":"07","source":"startRange"},
        {"type":"literal","value":", ","source":"startRange"},
        {"type":"hour","value":"10","source":"startRange"},
        {"type":"literal","value":":","source":"startRange"},
        {"type":"minute","value":"00","source":"startRange"},
        {"type":"literal","value":" ","source":"startRange"},
        {"type":"dayPeriod","value":"AM","source":"startRange"},
        {"type":"literal","value":" – ","source":"shared"},
        {"type":"month","value":"1","source":"endRange"},
        {"type":"literal","value":"/","source":"endRange"},
        {"type":"day","value":"20","source":"endRange"},
        {"type":"literal","value":"/","source":"endRange"},
        {"type":"year","value":"07","source":"endRange"},
        {"type":"literal","value":", ","source":"endRange"},
        {"type":"hour","value":"10","source":"endRange"},
        {"type":"literal","value":":","source":"endRange"},
        {"type":"minute","value":"00","source":"endRange"},
        {"type":"literal","value":" ","source":"endRange"},
        {"type":"dayPeriod","value":"AM","source":"endRange"},
    ]);
    if ($vm.icuVersion() > 66) {
        shouldBeParts(fmt11.formatRangeToParts(date1, date5), [
            {"type":"month","value":"1","source":"shared"},
            {"type":"literal","value":"/","source":"shared"},
            {"type":"day","value":"10","source":"shared"},
            {"type":"literal","value":"/","source":"shared"},
            {"type":"year","value":"07","source":"shared"},
            {"type":"literal","value":", ","source":"shared"},
            {"type":"hour","value":"10","source":"startRange"},
            {"type":"literal","value":":","source":"startRange"},
            {"type":"minute","value":"00","source":"startRange"},
            {"type":"literal","value":" ","source":"startRange"},
            {"type":"dayPeriod","value":"AM","source":"startRange"},
            {"type":"literal","value":" – ","source":"shared"},
            {"type":"hour","value":"0","source":"endRange"},
            {"type":"literal","value":":","source":"endRange"},
            {"type":"minute","value":"00","source":"endRange"},
            {"type":"literal","value":" ","source":"endRange"},
            {"type":"dayPeriod","value":"PM","source":"endRange"},
        ]);
    }
    shouldBeParts(fmt11.formatRangeToParts(date1, date6), [
        {"type":"month","value":"1","source":"shared"},
        {"type":"literal","value":"/","source":"shared"},
        {"type":"day","value":"10","source":"shared"},
        {"type":"literal","value":"/","source":"shared"},
        {"type":"year","value":"07","source":"shared"},
        {"type":"literal","value":", ","source":"shared"},
        {"type":"hour","value":"10","source":"startRange"},
        {"type":"literal","value":":","source":"startRange"},
        {"type":"minute","value":"00","source":"startRange"},
        {"type":"literal","value":" ","source":"startRange"},
        {"type":"dayPeriod","value":"AM","source":"startRange"},
        {"type":"literal","value":" – ","source":"shared"},
        {"type":"hour","value":"2","source":"endRange"},
        {"type":"literal","value":":","source":"endRange"},
        {"type":"minute","value":"00","source":"endRange"},
        {"type":"literal","value":" ","source":"endRange"},
        {"type":"dayPeriod","value":"PM","source":"endRange"},
    ]);
    shouldBeParts(fmt11.formatRangeToParts(date1, date7), [
        {"type":"month","value":"1","source":"shared"},
        {"type":"literal","value":"/","source":"shared"},
        {"type":"day","value":"10","source":"shared"},
        {"type":"literal","value":"/","source":"shared"},
        {"type":"year","value":"07","source":"shared"},
        {"type":"literal","value":", ","source":"shared"},
        {"type":"hour","value":"10","source":"startRange"},
        {"type":"literal","value":":","source":"startRange"},
        {"type":"minute","value":"00","source":"startRange"},
        {"type":"literal","value":" ","source":"startRange"},
        {"type":"dayPeriod","value":"AM","source":"startRange"},
        {"type":"literal","value":" – ","source":"shared"},
        {"type":"hour","value":"11","source":"endRange"},
        {"type":"literal","value":":","source":"endRange"},
        {"type":"minute","value":"00","source":"endRange"},
        {"type":"literal","value":" ","source":"endRange"},
        {"type":"dayPeriod","value":"PM","source":"endRange"},
    ]);
    if ($vm.icuVersion() > 66) {
        shouldBeParts(fmt11.formatRangeToParts(date1, date8), [
            {"type":"month","value":"1","source":"startRange"},
            {"type":"literal","value":"/","source":"startRange"},
            {"type":"day","value":"10","source":"startRange"},
            {"type":"literal","value":"/","source":"startRange"},
            {"type":"year","value":"07","source":"startRange"},
            {"type":"literal","value":", ","source":"startRange"},
            {"type":"hour","value":"10","source":"startRange"},
            {"type":"literal","value":":","source":"startRange"},
            {"type":"minute","value":"00","source":"startRange"},
            {"type":"literal","value":" ","source":"startRange"},
            {"type":"dayPeriod","value":"AM","source":"startRange"},
            {"type":"literal","value":" – ","source":"shared"},
            {"type":"month","value":"1","source":"endRange"},
            {"type":"literal","value":"/","source":"endRange"},
            {"type":"day","value":"11","source":"endRange"},
            {"type":"literal","value":"/","source":"endRange"},
            {"type":"year","value":"07","source":"endRange"},
            {"type":"literal","value":", ","source":"endRange"},
            {"type":"hour","value":"0","source":"endRange"},
            {"type":"literal","value":":","source":"endRange"},
            {"type":"minute","value":"00","source":"endRange"},
            {"type":"literal","value":" ","source":"endRange"},
            {"type":"dayPeriod","value":"AM","source":"endRange"},
        ]);
    }

    let fmt12 = new Intl.DateTimeFormat("en", {
        year: '2-digit',
        month: 'numeric',
        day: 'numeric',
        hour: '2-digit',
        minute: 'numeric',
        timeZone: 'UTC',
        hourCycle: 'h12',
    });
    shouldBe(fmt12.format(date1), `1/10/07, 10:00 AM`);
    shouldBe(fmt12.format(date8), `1/11/07, 12:00 AM`);
    shouldBeParts(fmt12.formatRangeToParts(date1, date2), [
        {"type":"month","value":"1","source":"shared"},
        {"type":"literal","value":"/","source":"shared"},
        {"type":"day","value":"10","source":"shared"},
        {"type":"literal","value":"/","source":"shared"},
        {"type":"year","value":"07","source":"shared"},
        {"type":"literal","value":", ","source":"shared"},
        {"type":"hour","value":"10","source":"startRange"},
        {"type":"literal","value":":","source":"startRange"},
        {"type":"minute","value":"00","source":"startRange"},
        {"type":"literal","value":" – ","source":"shared"},
        {"type":"hour","value":"11","source":"endRange"},
        {"type":"literal","value":":","source":"endRange"},
        {"type":"minute","value":"00","source":"endRange"},
        {"type":"literal","value":" ","source":"shared"},
        {"type":"dayPeriod","value":"AM","source":"shared"},
    ]);
    shouldBeParts(fmt12.formatRangeToParts(date1, date3), [
        {"type":"month","value":"1","source":"startRange"},
        {"type":"literal","value":"/","source":"startRange"},
        {"type":"day","value":"10","source":"startRange"},
        {"type":"literal","value":"/","source":"startRange"},
        {"type":"year","value":"07","source":"startRange"},
        {"type":"literal","value":", ","source":"startRange"},
        {"type":"hour","value":"10","source":"startRange"},
        {"type":"literal","value":":","source":"startRange"},
        {"type":"minute","value":"00","source":"startRange"},
        {"type":"literal","value":" ","source":"startRange"},
        {"type":"dayPeriod","value":"AM","source":"startRange"},
        {"type":"literal","value":" – ","source":"shared"},
        {"type":"month","value":"1","source":"endRange"},
        {"type":"literal","value":"/","source":"endRange"},
        {"type":"day","value":"20","source":"endRange"},
        {"type":"literal","value":"/","source":"endRange"},
        {"type":"year","value":"07","source":"endRange"},
        {"type":"literal","value":", ","source":"endRange"},
        {"type":"hour","value":"10","source":"endRange"},
        {"type":"literal","value":":","source":"endRange"},
        {"type":"minute","value":"00","source":"endRange"},
        {"type":"literal","value":" ","source":"endRange"},
        {"type":"dayPeriod","value":"AM","source":"endRange"},
    ]);
    shouldBeParts(fmt12.formatRangeToParts(date1, date5), [
        {"type":"month","value":"1","source":"shared"},
        {"type":"literal","value":"/","source":"shared"},
        {"type":"day","value":"10","source":"shared"},
        {"type":"literal","value":"/","source":"shared"},
        {"type":"year","value":"07","source":"shared"},
        {"type":"literal","value":", ","source":"shared"},
        {"type":"hour","value":"10","source":"startRange"},
        {"type":"literal","value":":","source":"startRange"},
        {"type":"minute","value":"00","source":"startRange"},
        {"type":"literal","value":" ","source":"startRange"},
        {"type":"dayPeriod","value":"AM","source":"startRange"},
        {"type":"literal","value":" – ","source":"shared"},
        {"type":"hour","value":"12","source":"endRange"},
        {"type":"literal","value":":","source":"endRange"},
        {"type":"minute","value":"00","source":"endRange"},
        {"type":"literal","value":" ","source":"endRange"},
        {"type":"dayPeriod","value":"PM","source":"endRange"},
    ]);
    shouldBeParts(fmt12.formatRangeToParts(date1, date6), [
        {"type":"month","value":"1","source":"shared"},
        {"type":"literal","value":"/","source":"shared"},
        {"type":"day","value":"10","source":"shared"},
        {"type":"literal","value":"/","source":"shared"},
        {"type":"year","value":"07","source":"shared"},
        {"type":"literal","value":", ","source":"shared"},
        {"type":"hour","value":"10","source":"startRange"},
        {"type":"literal","value":":","source":"startRange"},
        {"type":"minute","value":"00","source":"startRange"},
        {"type":"literal","value":" ","source":"startRange"},
        {"type":"dayPeriod","value":"AM","source":"startRange"},
        {"type":"literal","value":" – ","source":"shared"},
        {"type":"hour","value":"2","source":"endRange"},
        {"type":"literal","value":":","source":"endRange"},
        {"type":"minute","value":"00","source":"endRange"},
        {"type":"literal","value":" ","source":"endRange"},
        {"type":"dayPeriod","value":"PM","source":"endRange"},
    ]);
    shouldBeParts(fmt12.formatRangeToParts(date1, date7), [
        {"type":"month","value":"1","source":"shared"},
        {"type":"literal","value":"/","source":"shared"},
        {"type":"day","value":"10","source":"shared"},
        {"type":"literal","value":"/","source":"shared"},
        {"type":"year","value":"07","source":"shared"},
        {"type":"literal","value":", ","source":"shared"},
        {"type":"hour","value":"10","source":"startRange"},
        {"type":"literal","value":":","source":"startRange"},
        {"type":"minute","value":"00","source":"startRange"},
        {"type":"literal","value":" ","source":"startRange"},
        {"type":"dayPeriod","value":"AM","source":"startRange"},
        {"type":"literal","value":" – ","source":"shared"},
        {"type":"hour","value":"11","source":"endRange"},
        {"type":"literal","value":":","source":"endRange"},
        {"type":"minute","value":"00","source":"endRange"},
        {"type":"literal","value":" ","source":"endRange"},
        {"type":"dayPeriod","value":"PM","source":"endRange"},
    ]);
    shouldBeParts(fmt12.formatRangeToParts(date1, date8), [
        {"type":"month","value":"1","source":"startRange"},
        {"type":"literal","value":"/","source":"startRange"},
        {"type":"day","value":"10","source":"startRange"},
        {"type":"literal","value":"/","source":"startRange"},
        {"type":"year","value":"07","source":"startRange"},
        {"type":"literal","value":", ","source":"startRange"},
        {"type":"hour","value":"10","source":"startRange"},
        {"type":"literal","value":":","source":"startRange"},
        {"type":"minute","value":"00","source":"startRange"},
        {"type":"literal","value":" ","source":"startRange"},
        {"type":"dayPeriod","value":"AM","source":"startRange"},
        {"type":"literal","value":" – ","source":"shared"},
        {"type":"month","value":"1","source":"endRange"},
        {"type":"literal","value":"/","source":"endRange"},
        {"type":"day","value":"11","source":"endRange"},
        {"type":"literal","value":"/","source":"endRange"},
        {"type":"year","value":"07","source":"endRange"},
        {"type":"literal","value":", ","source":"endRange"},
        {"type":"hour","value":"12","source":"endRange"},
        {"type":"literal","value":":","source":"endRange"},
        {"type":"minute","value":"00","source":"endRange"},
        {"type":"literal","value":" ","source":"endRange"},
        {"type":"dayPeriod","value":"AM","source":"endRange"},
    ]);

    // "hc" + hour12.
    let fmt13 = new Intl.DateTimeFormat("en", {
        year: '2-digit',
        month: 'numeric',
        day: 'numeric',
        hour: '2-digit',
        minute: 'numeric',
        timeZone: 'UTC',
        hourCycle: 'h24',
        hour12: true,
    });
    shouldBe(fmt13.format(date1), `1/10/07, 10:00 AM`);
    shouldBe(fmt13.format(date8), `1/11/07, 12:00 AM`);
    shouldBeParts(fmt13.formatRangeToParts(date1, date2), [
        {"type":"month","value":"1","source":"shared"},
        {"type":"literal","value":"/","source":"shared"},
        {"type":"day","value":"10","source":"shared"},
        {"type":"literal","value":"/","source":"shared"},
        {"type":"year","value":"07","source":"shared"},
        {"type":"literal","value":", ","source":"shared"},
        {"type":"hour","value":"10","source":"startRange"},
        {"type":"literal","value":":","source":"startRange"},
        {"type":"minute","value":"00","source":"startRange"},
        {"type":"literal","value":" – ","source":"shared"},
        {"type":"hour","value":"11","source":"endRange"},
        {"type":"literal","value":":","source":"endRange"},
        {"type":"minute","value":"00","source":"endRange"},
        {"type":"literal","value":" ","source":"shared"},
        {"type":"dayPeriod","value":"AM","source":"shared"},
    ]);
    shouldBeParts(fmt13.formatRangeToParts(date1, date3), [
        {"type":"month","value":"1","source":"startRange"},
        {"type":"literal","value":"/","source":"startRange"},
        {"type":"day","value":"10","source":"startRange"},
        {"type":"literal","value":"/","source":"startRange"},
        {"type":"year","value":"07","source":"startRange"},
        {"type":"literal","value":", ","source":"startRange"},
        {"type":"hour","value":"10","source":"startRange"},
        {"type":"literal","value":":","source":"startRange"},
        {"type":"minute","value":"00","source":"startRange"},
        {"type":"literal","value":" ","source":"startRange"},
        {"type":"dayPeriod","value":"AM","source":"startRange"},
        {"type":"literal","value":" – ","source":"shared"},
        {"type":"month","value":"1","source":"endRange"},
        {"type":"literal","value":"/","source":"endRange"},
        {"type":"day","value":"20","source":"endRange"},
        {"type":"literal","value":"/","source":"endRange"},
        {"type":"year","value":"07","source":"endRange"},
        {"type":"literal","value":", ","source":"endRange"},
        {"type":"hour","value":"10","source":"endRange"},
        {"type":"literal","value":":","source":"endRange"},
        {"type":"minute","value":"00","source":"endRange"},
        {"type":"literal","value":" ","source":"endRange"},
        {"type":"dayPeriod","value":"AM","source":"endRange"},
    ]);
    shouldBeParts(fmt13.formatRangeToParts(date1, date5), [
        {"type":"month","value":"1","source":"shared"},
        {"type":"literal","value":"/","source":"shared"},
        {"type":"day","value":"10","source":"shared"},
        {"type":"literal","value":"/","source":"shared"},
        {"type":"year","value":"07","source":"shared"},
        {"type":"literal","value":", ","source":"shared"},
        {"type":"hour","value":"10","source":"startRange"},
        {"type":"literal","value":":","source":"startRange"},
        {"type":"minute","value":"00","source":"startRange"},
        {"type":"literal","value":" ","source":"startRange"},
        {"type":"dayPeriod","value":"AM","source":"startRange"},
        {"type":"literal","value":" – ","source":"shared"},
        {"type":"hour","value":"12","source":"endRange"},
        {"type":"literal","value":":","source":"endRange"},
        {"type":"minute","value":"00","source":"endRange"},
        {"type":"literal","value":" ","source":"endRange"},
        {"type":"dayPeriod","value":"PM","source":"endRange"},
    ]);
    shouldBeParts(fmt13.formatRangeToParts(date1, date6), [
        {"type":"month","value":"1","source":"shared"},
        {"type":"literal","value":"/","source":"shared"},
        {"type":"day","value":"10","source":"shared"},
        {"type":"literal","value":"/","source":"shared"},
        {"type":"year","value":"07","source":"shared"},
        {"type":"literal","value":", ","source":"shared"},
        {"type":"hour","value":"10","source":"startRange"},
        {"type":"literal","value":":","source":"startRange"},
        {"type":"minute","value":"00","source":"startRange"},
        {"type":"literal","value":" ","source":"startRange"},
        {"type":"dayPeriod","value":"AM","source":"startRange"},
        {"type":"literal","value":" – ","source":"shared"},
        {"type":"hour","value":"2","source":"endRange"},
        {"type":"literal","value":":","source":"endRange"},
        {"type":"minute","value":"00","source":"endRange"},
        {"type":"literal","value":" ","source":"endRange"},
        {"type":"dayPeriod","value":"PM","source":"endRange"},
    ]);
    shouldBeParts(fmt13.formatRangeToParts(date1, date7), [
        {"type":"month","value":"1","source":"shared"},
        {"type":"literal","value":"/","source":"shared"},
        {"type":"day","value":"10","source":"shared"},
        {"type":"literal","value":"/","source":"shared"},
        {"type":"year","value":"07","source":"shared"},
        {"type":"literal","value":", ","source":"shared"},
        {"type":"hour","value":"10","source":"startRange"},
        {"type":"literal","value":":","source":"startRange"},
        {"type":"minute","value":"00","source":"startRange"},
        {"type":"literal","value":" ","source":"startRange"},
        {"type":"dayPeriod","value":"AM","source":"startRange"},
        {"type":"literal","value":" – ","source":"shared"},
        {"type":"hour","value":"11","source":"endRange"},
        {"type":"literal","value":":","source":"endRange"},
        {"type":"minute","value":"00","source":"endRange"},
        {"type":"literal","value":" ","source":"endRange"},
        {"type":"dayPeriod","value":"PM","source":"endRange"},
    ]);
    shouldBeParts(fmt13.formatRangeToParts(date1, date8), [
        {"type":"month","value":"1","source":"startRange"},
        {"type":"literal","value":"/","source":"startRange"},
        {"type":"day","value":"10","source":"startRange"},
        {"type":"literal","value":"/","source":"startRange"},
        {"type":"year","value":"07","source":"startRange"},
        {"type":"literal","value":", ","source":"startRange"},
        {"type":"hour","value":"10","source":"startRange"},
        {"type":"literal","value":":","source":"startRange"},
        {"type":"minute","value":"00","source":"startRange"},
        {"type":"literal","value":" ","source":"startRange"},
        {"type":"dayPeriod","value":"AM","source":"startRange"},
        {"type":"literal","value":" – ","source":"shared"},
        {"type":"month","value":"1","source":"endRange"},
        {"type":"literal","value":"/","source":"endRange"},
        {"type":"day","value":"11","source":"endRange"},
        {"type":"literal","value":"/","source":"endRange"},
        {"type":"year","value":"07","source":"endRange"},
        {"type":"literal","value":", ","source":"endRange"},
        {"type":"hour","value":"12","source":"endRange"},
        {"type":"literal","value":":","source":"endRange"},
        {"type":"minute","value":"00","source":"endRange"},
        {"type":"literal","value":" ","source":"endRange"},
        {"type":"dayPeriod","value":"AM","source":"endRange"},
    ]);

    let fmt14 = new Intl.DateTimeFormat("en", {
        year: '2-digit',
        month: 'numeric',
        day: 'numeric',
        hour: '2-digit',
        minute: 'numeric',
        timeZone: 'UTC',
        hourCycle: 'h23',
        hour12: true,
    });
    shouldBe(fmt14.format(date1), `1/10/07, 10:00 AM`);
    shouldBe(fmt14.format(date8), `1/11/07, 12:00 AM`);
    shouldBeParts(fmt14.formatRangeToParts(date1, date2), [
        {"type":"month","value":"1","source":"shared"},
        {"type":"literal","value":"/","source":"shared"},
        {"type":"day","value":"10","source":"shared"},
        {"type":"literal","value":"/","source":"shared"},
        {"type":"year","value":"07","source":"shared"},
        {"type":"literal","value":", ","source":"shared"},
        {"type":"hour","value":"10","source":"startRange"},
        {"type":"literal","value":":","source":"startRange"},
        {"type":"minute","value":"00","source":"startRange"},
        {"type":"literal","value":" – ","source":"shared"},
        {"type":"hour","value":"11","source":"endRange"},
        {"type":"literal","value":":","source":"endRange"},
        {"type":"minute","value":"00","source":"endRange"},
        {"type":"literal","value":" ","source":"shared"},
        {"type":"dayPeriod","value":"AM","source":"shared"},
    ]);
    shouldBeParts(fmt14.formatRangeToParts(date1, date3), [
        {"type":"month","value":"1","source":"startRange"},
        {"type":"literal","value":"/","source":"startRange"},
        {"type":"day","value":"10","source":"startRange"},
        {"type":"literal","value":"/","source":"startRange"},
        {"type":"year","value":"07","source":"startRange"},
        {"type":"literal","value":", ","source":"startRange"},
        {"type":"hour","value":"10","source":"startRange"},
        {"type":"literal","value":":","source":"startRange"},
        {"type":"minute","value":"00","source":"startRange"},
        {"type":"literal","value":" ","source":"startRange"},
        {"type":"dayPeriod","value":"AM","source":"startRange"},
        {"type":"literal","value":" – ","source":"shared"},
        {"type":"month","value":"1","source":"endRange"},
        {"type":"literal","value":"/","source":"endRange"},
        {"type":"day","value":"20","source":"endRange"},
        {"type":"literal","value":"/","source":"endRange"},
        {"type":"year","value":"07","source":"endRange"},
        {"type":"literal","value":", ","source":"endRange"},
        {"type":"hour","value":"10","source":"endRange"},
        {"type":"literal","value":":","source":"endRange"},
        {"type":"minute","value":"00","source":"endRange"},
        {"type":"literal","value":" ","source":"endRange"},
        {"type":"dayPeriod","value":"AM","source":"endRange"},
    ]);
    shouldBeParts(fmt14.formatRangeToParts(date1, date5), [
        {"type":"month","value":"1","source":"shared"},
        {"type":"literal","value":"/","source":"shared"},
        {"type":"day","value":"10","source":"shared"},
        {"type":"literal","value":"/","source":"shared"},
        {"type":"year","value":"07","source":"shared"},
        {"type":"literal","value":", ","source":"shared"},
        {"type":"hour","value":"10","source":"startRange"},
        {"type":"literal","value":":","source":"startRange"},
        {"type":"minute","value":"00","source":"startRange"},
        {"type":"literal","value":" ","source":"startRange"},
        {"type":"dayPeriod","value":"AM","source":"startRange"},
        {"type":"literal","value":" – ","source":"shared"},
        {"type":"hour","value":"12","source":"endRange"},
        {"type":"literal","value":":","source":"endRange"},
        {"type":"minute","value":"00","source":"endRange"},
        {"type":"literal","value":" ","source":"endRange"},
        {"type":"dayPeriod","value":"PM","source":"endRange"},
    ]);
    shouldBeParts(fmt14.formatRangeToParts(date1, date6), [
        {"type":"month","value":"1","source":"shared"},
        {"type":"literal","value":"/","source":"shared"},
        {"type":"day","value":"10","source":"shared"},
        {"type":"literal","value":"/","source":"shared"},
        {"type":"year","value":"07","source":"shared"},
        {"type":"literal","value":", ","source":"shared"},
        {"type":"hour","value":"10","source":"startRange"},
        {"type":"literal","value":":","source":"startRange"},
        {"type":"minute","value":"00","source":"startRange"},
        {"type":"literal","value":" ","source":"startRange"},
        {"type":"dayPeriod","value":"AM","source":"startRange"},
        {"type":"literal","value":" – ","source":"shared"},
        {"type":"hour","value":"2","source":"endRange"},
        {"type":"literal","value":":","source":"endRange"},
        {"type":"minute","value":"00","source":"endRange"},
        {"type":"literal","value":" ","source":"endRange"},
        {"type":"dayPeriod","value":"PM","source":"endRange"},
    ]);
    shouldBeParts(fmt14.formatRangeToParts(date1, date7), [
        {"type":"month","value":"1","source":"shared"},
        {"type":"literal","value":"/","source":"shared"},
        {"type":"day","value":"10","source":"shared"},
        {"type":"literal","value":"/","source":"shared"},
        {"type":"year","value":"07","source":"shared"},
        {"type":"literal","value":", ","source":"shared"},
        {"type":"hour","value":"10","source":"startRange"},
        {"type":"literal","value":":","source":"startRange"},
        {"type":"minute","value":"00","source":"startRange"},
        {"type":"literal","value":" ","source":"startRange"},
        {"type":"dayPeriod","value":"AM","source":"startRange"},
        {"type":"literal","value":" – ","source":"shared"},
        {"type":"hour","value":"11","source":"endRange"},
        {"type":"literal","value":":","source":"endRange"},
        {"type":"minute","value":"00","source":"endRange"},
        {"type":"literal","value":" ","source":"endRange"},
        {"type":"dayPeriod","value":"PM","source":"endRange"},
    ]);
    shouldBeParts(fmt14.formatRangeToParts(date1, date8), [
        {"type":"month","value":"1","source":"startRange"},
        {"type":"literal","value":"/","source":"startRange"},
        {"type":"day","value":"10","source":"startRange"},
        {"type":"literal","value":"/","source":"startRange"},
        {"type":"year","value":"07","source":"startRange"},
        {"type":"literal","value":", ","source":"startRange"},
        {"type":"hour","value":"10","source":"startRange"},
        {"type":"literal","value":":","source":"startRange"},
        {"type":"minute","value":"00","source":"startRange"},
        {"type":"literal","value":" ","source":"startRange"},
        {"type":"dayPeriod","value":"AM","source":"startRange"},
        {"type":"literal","value":" – ","source":"shared"},
        {"type":"month","value":"1","source":"endRange"},
        {"type":"literal","value":"/","source":"endRange"},
        {"type":"day","value":"11","source":"endRange"},
        {"type":"literal","value":"/","source":"endRange"},
        {"type":"year","value":"07","source":"endRange"},
        {"type":"literal","value":", ","source":"endRange"},
        {"type":"hour","value":"12","source":"endRange"},
        {"type":"literal","value":":","source":"endRange"},
        {"type":"minute","value":"00","source":"endRange"},
        {"type":"literal","value":" ","source":"endRange"},
        {"type":"dayPeriod","value":"AM","source":"endRange"},
    ]);

    let fmt15 = new Intl.DateTimeFormat("en", {
        year: '2-digit',
        month: 'numeric',
        day: 'numeric',
        hour: '2-digit',
        minute: 'numeric',
        timeZone: 'UTC',
        hourCycle: 'h11',
        hour12: true,
    });
    shouldBe(fmt15.format(date1), `1/10/07, 10:00 AM`);
    shouldBe(fmt15.format(date8), `1/11/07, 12:00 AM`);
    shouldBeParts(fmt15.formatRangeToParts(date1, date2), [
        {"type":"month","value":"1","source":"shared"},
        {"type":"literal","value":"/","source":"shared"},
        {"type":"day","value":"10","source":"shared"},
        {"type":"literal","value":"/","source":"shared"},
        {"type":"year","value":"07","source":"shared"},
        {"type":"literal","value":", ","source":"shared"},
        {"type":"hour","value":"10","source":"startRange"},
        {"type":"literal","value":":","source":"startRange"},
        {"type":"minute","value":"00","source":"startRange"},
        {"type":"literal","value":" – ","source":"shared"},
        {"type":"hour","value":"11","source":"endRange"},
        {"type":"literal","value":":","source":"endRange"},
        {"type":"minute","value":"00","source":"endRange"},
        {"type":"literal","value":" ","source":"shared"},
        {"type":"dayPeriod","value":"AM","source":"shared"},
    ]);
    shouldBeParts(fmt15.formatRangeToParts(date1, date3), [
        {"type":"month","value":"1","source":"startRange"},
        {"type":"literal","value":"/","source":"startRange"},
        {"type":"day","value":"10","source":"startRange"},
        {"type":"literal","value":"/","source":"startRange"},
        {"type":"year","value":"07","source":"startRange"},
        {"type":"literal","value":", ","source":"startRange"},
        {"type":"hour","value":"10","source":"startRange"},
        {"type":"literal","value":":","source":"startRange"},
        {"type":"minute","value":"00","source":"startRange"},
        {"type":"literal","value":" ","source":"startRange"},
        {"type":"dayPeriod","value":"AM","source":"startRange"},
        {"type":"literal","value":" – ","source":"shared"},
        {"type":"month","value":"1","source":"endRange"},
        {"type":"literal","value":"/","source":"endRange"},
        {"type":"day","value":"20","source":"endRange"},
        {"type":"literal","value":"/","source":"endRange"},
        {"type":"year","value":"07","source":"endRange"},
        {"type":"literal","value":", ","source":"endRange"},
        {"type":"hour","value":"10","source":"endRange"},
        {"type":"literal","value":":","source":"endRange"},
        {"type":"minute","value":"00","source":"endRange"},
        {"type":"literal","value":" ","source":"endRange"},
        {"type":"dayPeriod","value":"AM","source":"endRange"},
    ]);
    shouldBeParts(fmt15.formatRangeToParts(date1, date5), [
        {"type":"month","value":"1","source":"shared"},
        {"type":"literal","value":"/","source":"shared"},
        {"type":"day","value":"10","source":"shared"},
        {"type":"literal","value":"/","source":"shared"},
        {"type":"year","value":"07","source":"shared"},
        {"type":"literal","value":", ","source":"shared"},
        {"type":"hour","value":"10","source":"startRange"},
        {"type":"literal","value":":","source":"startRange"},
        {"type":"minute","value":"00","source":"startRange"},
        {"type":"literal","value":" ","source":"startRange"},
        {"type":"dayPeriod","value":"AM","source":"startRange"},
        {"type":"literal","value":" – ","source":"shared"},
        {"type":"hour","value":"12","source":"endRange"},
        {"type":"literal","value":":","source":"endRange"},
        {"type":"minute","value":"00","source":"endRange"},
        {"type":"literal","value":" ","source":"endRange"},
        {"type":"dayPeriod","value":"PM","source":"endRange"},
    ]);
    shouldBeParts(fmt15.formatRangeToParts(date1, date6), [
        {"type":"month","value":"1","source":"shared"},
        {"type":"literal","value":"/","source":"shared"},
        {"type":"day","value":"10","source":"shared"},
        {"type":"literal","value":"/","source":"shared"},
        {"type":"year","value":"07","source":"shared"},
        {"type":"literal","value":", ","source":"shared"},
        {"type":"hour","value":"10","source":"startRange"},
        {"type":"literal","value":":","source":"startRange"},
        {"type":"minute","value":"00","source":"startRange"},
        {"type":"literal","value":" ","source":"startRange"},
        {"type":"dayPeriod","value":"AM","source":"startRange"},
        {"type":"literal","value":" – ","source":"shared"},
        {"type":"hour","value":"2","source":"endRange"},
        {"type":"literal","value":":","source":"endRange"},
        {"type":"minute","value":"00","source":"endRange"},
        {"type":"literal","value":" ","source":"endRange"},
        {"type":"dayPeriod","value":"PM","source":"endRange"},
    ]);
    shouldBeParts(fmt15.formatRangeToParts(date1, date7), [
        {"type":"month","value":"1","source":"shared"},
        {"type":"literal","value":"/","source":"shared"},
        {"type":"day","value":"10","source":"shared"},
        {"type":"literal","value":"/","source":"shared"},
        {"type":"year","value":"07","source":"shared"},
        {"type":"literal","value":", ","source":"shared"},
        {"type":"hour","value":"10","source":"startRange"},
        {"type":"literal","value":":","source":"startRange"},
        {"type":"minute","value":"00","source":"startRange"},
        {"type":"literal","value":" ","source":"startRange"},
        {"type":"dayPeriod","value":"AM","source":"startRange"},
        {"type":"literal","value":" – ","source":"shared"},
        {"type":"hour","value":"11","source":"endRange"},
        {"type":"literal","value":":","source":"endRange"},
        {"type":"minute","value":"00","source":"endRange"},
        {"type":"literal","value":" ","source":"endRange"},
        {"type":"dayPeriod","value":"PM","source":"endRange"},
    ]);
    shouldBeParts(fmt15.formatRangeToParts(date1, date8), [
        {"type":"month","value":"1","source":"startRange"},
        {"type":"literal","value":"/","source":"startRange"},
        {"type":"day","value":"10","source":"startRange"},
        {"type":"literal","value":"/","source":"startRange"},
        {"type":"year","value":"07","source":"startRange"},
        {"type":"literal","value":", ","source":"startRange"},
        {"type":"hour","value":"10","source":"startRange"},
        {"type":"literal","value":":","source":"startRange"},
        {"type":"minute","value":"00","source":"startRange"},
        {"type":"literal","value":" ","source":"startRange"},
        {"type":"dayPeriod","value":"AM","source":"startRange"},
        {"type":"literal","value":" – ","source":"shared"},
        {"type":"month","value":"1","source":"endRange"},
        {"type":"literal","value":"/","source":"endRange"},
        {"type":"day","value":"11","source":"endRange"},
        {"type":"literal","value":"/","source":"endRange"},
        {"type":"year","value":"07","source":"endRange"},
        {"type":"literal","value":", ","source":"endRange"},
        {"type":"hour","value":"12","source":"endRange"},
        {"type":"literal","value":":","source":"endRange"},
        {"type":"minute","value":"00","source":"endRange"},
        {"type":"literal","value":" ","source":"endRange"},
        {"type":"dayPeriod","value":"AM","source":"endRange"},
    ]);

    let fmt16 = new Intl.DateTimeFormat("en", {
        year: '2-digit',
        month: 'numeric',
        day: 'numeric',
        hour: '2-digit',
        minute: 'numeric',
        timeZone: 'UTC',
        hourCycle: 'h12',
        hour12: true,
    });
    shouldBe(fmt16.format(date1), `1/10/07, 10:00 AM`);
    shouldBe(fmt16.format(date8), `1/11/07, 12:00 AM`);
    shouldBeParts(fmt16.formatRangeToParts(date1, date2), [
        {"type":"month","value":"1","source":"shared"},
        {"type":"literal","value":"/","source":"shared"},
        {"type":"day","value":"10","source":"shared"},
        {"type":"literal","value":"/","source":"shared"},
        {"type":"year","value":"07","source":"shared"},
        {"type":"literal","value":", ","source":"shared"},
        {"type":"hour","value":"10","source":"startRange"},
        {"type":"literal","value":":","source":"startRange"},
        {"type":"minute","value":"00","source":"startRange"},
        {"type":"literal","value":" – ","source":"shared"},
        {"type":"hour","value":"11","source":"endRange"},
        {"type":"literal","value":":","source":"endRange"},
        {"type":"minute","value":"00","source":"endRange"},
        {"type":"literal","value":" ","source":"shared"},
        {"type":"dayPeriod","value":"AM","source":"shared"},
    ]);
    shouldBeParts(fmt16.formatRangeToParts(date1, date3), [
        {"type":"month","value":"1","source":"startRange"},
        {"type":"literal","value":"/","source":"startRange"},
        {"type":"day","value":"10","source":"startRange"},
        {"type":"literal","value":"/","source":"startRange"},
        {"type":"year","value":"07","source":"startRange"},
        {"type":"literal","value":", ","source":"startRange"},
        {"type":"hour","value":"10","source":"startRange"},
        {"type":"literal","value":":","source":"startRange"},
        {"type":"minute","value":"00","source":"startRange"},
        {"type":"literal","value":" ","source":"startRange"},
        {"type":"dayPeriod","value":"AM","source":"startRange"},
        {"type":"literal","value":" – ","source":"shared"},
        {"type":"month","value":"1","source":"endRange"},
        {"type":"literal","value":"/","source":"endRange"},
        {"type":"day","value":"20","source":"endRange"},
        {"type":"literal","value":"/","source":"endRange"},
        {"type":"year","value":"07","source":"endRange"},
        {"type":"literal","value":", ","source":"endRange"},
        {"type":"hour","value":"10","source":"endRange"},
        {"type":"literal","value":":","source":"endRange"},
        {"type":"minute","value":"00","source":"endRange"},
        {"type":"literal","value":" ","source":"endRange"},
        {"type":"dayPeriod","value":"AM","source":"endRange"},
    ]);
    shouldBeParts(fmt16.formatRangeToParts(date1, date5), [
        {"type":"month","value":"1","source":"shared"},
        {"type":"literal","value":"/","source":"shared"},
        {"type":"day","value":"10","source":"shared"},
        {"type":"literal","value":"/","source":"shared"},
        {"type":"year","value":"07","source":"shared"},
        {"type":"literal","value":", ","source":"shared"},
        {"type":"hour","value":"10","source":"startRange"},
        {"type":"literal","value":":","source":"startRange"},
        {"type":"minute","value":"00","source":"startRange"},
        {"type":"literal","value":" ","source":"startRange"},
        {"type":"dayPeriod","value":"AM","source":"startRange"},
        {"type":"literal","value":" – ","source":"shared"},
        {"type":"hour","value":"12","source":"endRange"},
        {"type":"literal","value":":","source":"endRange"},
        {"type":"minute","value":"00","source":"endRange"},
        {"type":"literal","value":" ","source":"endRange"},
        {"type":"dayPeriod","value":"PM","source":"endRange"},
    ]);
    shouldBeParts(fmt16.formatRangeToParts(date1, date6), [
        {"type":"month","value":"1","source":"shared"},
        {"type":"literal","value":"/","source":"shared"},
        {"type":"day","value":"10","source":"shared"},
        {"type":"literal","value":"/","source":"shared"},
        {"type":"year","value":"07","source":"shared"},
        {"type":"literal","value":", ","source":"shared"},
        {"type":"hour","value":"10","source":"startRange"},
        {"type":"literal","value":":","source":"startRange"},
        {"type":"minute","value":"00","source":"startRange"},
        {"type":"literal","value":" ","source":"startRange"},
        {"type":"dayPeriod","value":"AM","source":"startRange"},
        {"type":"literal","value":" – ","source":"shared"},
        {"type":"hour","value":"2","source":"endRange"},
        {"type":"literal","value":":","source":"endRange"},
        {"type":"minute","value":"00","source":"endRange"},
        {"type":"literal","value":" ","source":"endRange"},
        {"type":"dayPeriod","value":"PM","source":"endRange"},
    ]);
    shouldBeParts(fmt16.formatRangeToParts(date1, date7), [
        {"type":"month","value":"1","source":"shared"},
        {"type":"literal","value":"/","source":"shared"},
        {"type":"day","value":"10","source":"shared"},
        {"type":"literal","value":"/","source":"shared"},
        {"type":"year","value":"07","source":"shared"},
        {"type":"literal","value":", ","source":"shared"},
        {"type":"hour","value":"10","source":"startRange"},
        {"type":"literal","value":":","source":"startRange"},
        {"type":"minute","value":"00","source":"startRange"},
        {"type":"literal","value":" ","source":"startRange"},
        {"type":"dayPeriod","value":"AM","source":"startRange"},
        {"type":"literal","value":" – ","source":"shared"},
        {"type":"hour","value":"11","source":"endRange"},
        {"type":"literal","value":":","source":"endRange"},
        {"type":"minute","value":"00","source":"endRange"},
        {"type":"literal","value":" ","source":"endRange"},
        {"type":"dayPeriod","value":"PM","source":"endRange"},
    ]);
    shouldBeParts(fmt16.formatRangeToParts(date1, date8), [
        {"type":"month","value":"1","source":"startRange"},
        {"type":"literal","value":"/","source":"startRange"},
        {"type":"day","value":"10","source":"startRange"},
        {"type":"literal","value":"/","source":"startRange"},
        {"type":"year","value":"07","source":"startRange"},
        {"type":"literal","value":", ","source":"startRange"},
        {"type":"hour","value":"10","source":"startRange"},
        {"type":"literal","value":":","source":"startRange"},
        {"type":"minute","value":"00","source":"startRange"},
        {"type":"literal","value":" ","source":"startRange"},
        {"type":"dayPeriod","value":"AM","source":"startRange"},
        {"type":"literal","value":" – ","source":"shared"},
        {"type":"month","value":"1","source":"endRange"},
        {"type":"literal","value":"/","source":"endRange"},
        {"type":"day","value":"11","source":"endRange"},
        {"type":"literal","value":"/","source":"endRange"},
        {"type":"year","value":"07","source":"endRange"},
        {"type":"literal","value":", ","source":"endRange"},
        {"type":"hour","value":"12","source":"endRange"},
        {"type":"literal","value":":","source":"endRange"},
        {"type":"minute","value":"00","source":"endRange"},
        {"type":"literal","value":" ","source":"endRange"},
        {"type":"dayPeriod","value":"AM","source":"endRange"},
    ]);
}

if (Intl.DateTimeFormat.prototype.formatRangeToParts)
    test();