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var moment = require("../../moment");

exports.duration = {
    "object instantiation" : function (test) {
        var d = moment.duration({
            years: 2,
            months: 3,
            weeks: 2,
            days: 1,
            hours: 8,
            minutes: 9,
            seconds: 20,
            milliseconds: 12
        });

        test.expect(8);
        test.equal(d.years(),        2,  "years");
        test.equal(d.months(),       3,  "months");
        test.equal(d.weeks(),        2,  "weeks");
        test.equal(d.days(),         15, "days"); // two weeks + 1 day
        test.equal(d.hours(),        8,  "hours");
        test.equal(d.minutes(),      9,  "minutes");
        test.equal(d.seconds(),      20, "seconds");
        test.equal(d.milliseconds(), 12, "milliseconds");
        test.done();
    },

    "object instantiation with strings" : function (test) {
        var d = moment.duration({
            years: '2',
            months: '3',
            weeks: '2',
            days: '1',
            hours: '8',
            minutes: '9',
            seconds: '20',
            milliseconds: '12'
        });

        test.expect(8);
        test.equal(d.years(),        2,  "years");
        test.equal(d.months(),       3,  "months");
        test.equal(d.weeks(),        2,  "weeks");
        test.equal(d.days(),         15, "days"); // two weeks + 1 day
        test.equal(d.hours(),        8,  "hours");
        test.equal(d.minutes(),      9,  "minutes");
        test.equal(d.seconds(),      20, "seconds");
        test.equal(d.milliseconds(), 12, "milliseconds");
        test.done();
    },

    "milliseconds instantiation" : function (test) {
        test.expect(1);
        test.equal(moment.duration(72).milliseconds(), 72, "milliseconds");
        test.done();
    },

    "instantiation by type" : function (test) {
        test.expect(16);
        test.equal(moment.duration(1, "years").years(),                 1, "years");
        test.equal(moment.duration(1, "y").years(),                     1, "y");
        test.equal(moment.duration(2, "months").months(),               2, "months");
        test.equal(moment.duration(2, "M").months(),                    2, "M");
        test.equal(moment.duration(3, "weeks").weeks(),                 3, "weeks");
        test.equal(moment.duration(3, "w").weeks(),                     3, "weeks");
        test.equal(moment.duration(4, "days").days(),                   4, "days");
        test.equal(moment.duration(4, "d").days(),                      4, "d");
        test.equal(moment.duration(5, "hours").hours(),                 5, "hours");
        test.equal(moment.duration(5, "h").hours(),                     5, "h");
        test.equal(moment.duration(6, "minutes").minutes(),             6, "minutes");
        test.equal(moment.duration(6, "m").minutes(),                   6, "m");
        test.equal(moment.duration(7, "seconds").seconds(),             7, "seconds");
        test.equal(moment.duration(7, "s").seconds(),                   7, "s");
        test.equal(moment.duration(8, "milliseconds").milliseconds(),   8, "milliseconds");
        test.equal(moment.duration(8, "ms").milliseconds(),             8, "ms");
        test.done();
    },

    "shortcuts" : function (test) {
        test.expect(8);
        test.equal(moment.duration({y: 1}).years(),         1, "years = y");
        test.equal(moment.duration({M: 2}).months(),        2, "months = M");
        test.equal(moment.duration({w: 3}).weeks(),         3, "weeks = w");
        test.equal(moment.duration({d: 4}).days(),          4, "days = d");
        test.equal(moment.duration({h: 5}).hours(),         5, "hours = h");
        test.equal(moment.duration({m: 6}).minutes(),       6, "minutes = m");
        test.equal(moment.duration({s: 7}).seconds(),       7, "seconds = s");
        test.equal(moment.duration({ms: 8}).milliseconds(), 8, "milliseconds = ms");
        test.done();
    },

    "generic getter" : function (test) {
        test.expect(24);
        test.equal(moment.duration(1, "years").get("years"),                1, "years");
        test.equal(moment.duration(1, "years").get("year"),                 1, "years = year");
        test.equal(moment.duration(1, "years").get("y"),                    1, "years = y");
        test.equal(moment.duration(2, "months").get("months"),              2, "months");
        test.equal(moment.duration(2, "months").get("month"),               2, "months = month");
        test.equal(moment.duration(2, "months").get("M"),                   2, "months = M");
        test.equal(moment.duration(3, "weeks").get("weeks"),                3, "weeks");
        test.equal(moment.duration(3, "weeks").get("week"),                 3, "weeks = week");
        test.equal(moment.duration(3, "weeks").get("w"),                    3, "weeks = w");
        test.equal(moment.duration(4, "days").get("days"),                  4, "days");
        test.equal(moment.duration(4, "days").get("day"),                   4, "days = day");
        test.equal(moment.duration(4, "days").get("d"),                     4, "days = d");
        test.equal(moment.duration(5, "hours").get("hours"),                5, "hours");
        test.equal(moment.duration(5, "hours").get("hour"),                 5, "hours = hour");
        test.equal(moment.duration(5, "hours").get("h"),                    5, "hours = h");
        test.equal(moment.duration(6, "minutes").get("minutes"),            6, "minutes");
        test.equal(moment.duration(6, "minutes").get("minute"),             6, "minutes = minute");
        test.equal(moment.duration(6, "minutes").get("m"),                  6, "minutes = m");
        test.equal(moment.duration(7, "seconds").get("seconds"),            7, "seconds");
        test.equal(moment.duration(7, "seconds").get("second"),             7, "seconds = second");
        test.equal(moment.duration(7, "seconds").get("s"),                  7, "seconds = s");
        test.equal(moment.duration(8, "milliseconds").get("milliseconds"),  8, "milliseconds");
        test.equal(moment.duration(8, "milliseconds").get("millisecond"),   8, "milliseconds = millisecond");
        test.equal(moment.duration(8, "milliseconds").get("ms"),            8, "milliseconds = ms");
        test.done();
    },

    "instantiation from another duration" : function (test) {
        var simple = moment.duration(1234),
            lengthy = moment.duration(60 * 60 * 24 * 360 * 1e3),
            complicated = moment.duration({
                years: 2,
                months: 3,
                weeks: 4,
                days: 1,
                hours: 8,
                minutes: 9,
                seconds: 20,
                milliseconds: 12
            });

        test.expect(3);
        test.deepEqual(moment.duration(simple), simple, "simple clones are equal");
        test.deepEqual(moment.duration(lengthy), lengthy, "lengthy clones are equal");
        test.deepEqual(moment.duration(complicated), complicated, "complicated clones are equal");
        test.done();
    },

    "instantiation from 24-hour time zero" : function (test) {
        test.expect(6);
        test.equal(moment.duration("00:00").years(), 0, "0 years");
        test.equal(moment.duration("00:00").days(), 0, "0 days");
        test.equal(moment.duration("00:00").hours(), 0, "0 hours");
        test.equal(moment.duration("00:00").minutes(), 0, "0 minutes");
        test.equal(moment.duration("00:00").seconds(), 0, "0 seconds");
        test.equal(moment.duration("00:00").milliseconds(), 0, "0 milliseconds");
        test.done();
    },

    "instantiation from 24-hour time <24 hours" : function (test) {
        test.expect(6);
        test.equal(moment.duration("06:45").years(), 0, "0 years");
        test.equal(moment.duration("06:45").days(), 0, "0 days");
        test.equal(moment.duration("06:45").hours(), 6, "6 hours");
        test.equal(moment.duration("06:45").minutes(), 45, "45 minutes");
        test.equal(moment.duration("06:45").seconds(), 0, "0 seconds");
        test.equal(moment.duration("06:45").milliseconds(), 0, "0 milliseconds");
        test.done();
    },

    "instantiation from 24-hour time >24 hours" : function (test) {
        test.expect(6);
        test.equal(moment.duration("26:45").years(), 0, "0 years");
        test.equal(moment.duration("26:45").days(), 1, "0 days");
        test.equal(moment.duration("26:45").hours(), 2, "2 hours");
        test.equal(moment.duration("26:45").minutes(), 45, "45 minutes");
        test.equal(moment.duration("26:45").seconds(), 0, "0 seconds");
        test.equal(moment.duration("26:45").milliseconds(), 0, "0 milliseconds");
        test.done();
    },

    "instatiation from serialized C# TimeSpan zero" : function (test) {
        test.expect(6);
        test.equal(moment.duration("00:00:00").years(), 0, "0 years");
        test.equal(moment.duration("00:00:00").days(), 0, "0 days");
        test.equal(moment.duration("00:00:00").hours(), 0, "0 hours");
        test.equal(moment.duration("00:00:00").minutes(), 0, "0 minutes");
        test.equal(moment.duration("00:00:00").seconds(), 0, "0 seconds");
        test.equal(moment.duration("00:00:00").milliseconds(), 0, "0 milliseconds");
        test.done();
    },

    "instatiation from serialized C# TimeSpan with days" : function (test) {
        test.expect(6);
        test.equal(moment.duration("1.02:03:04.9999999").years(), 0, "0 years");
        test.equal(moment.duration("1.02:03:04.9999999").days(), 1, "1 day");
        test.equal(moment.duration("1.02:03:04.9999999").hours(), 2, "2 hours");
        test.equal(moment.duration("1.02:03:04.9999999").minutes(), 3, "3 minutes");
        test.equal(moment.duration("1.02:03:04.9999999").seconds(), 4, "4 seconds");
        test.equal(moment.duration("1.02:03:04.9999999").milliseconds(), 999, "999 milliseconds");
        test.done();
    },

    "instatiation from serialized C# TimeSpan without days" : function (test) {
        test.expect(10);
        test.equal(moment.duration("01:02:03.9999999").years(), 0, "0 years");
        test.equal(moment.duration("01:02:03.9999999").days(), 0, "0 days");
        test.equal(moment.duration("01:02:03.9999999").hours(), 1, "1 hour");
        test.equal(moment.duration("01:02:03.9999999").minutes(), 2, "2 minutes");
        test.equal(moment.duration("01:02:03.9999999").seconds(), 3, "3 seconds");
        test.equal(moment.duration("01:02:03.9999999").milliseconds(), 999, "999 milliseconds");

        test.equal(moment.duration("23:59:59.9999999").days(), 0, "0 days");
        test.equal(moment.duration("23:59:59.9999999").hours(), 23, "23 hours");

        test.equal(moment.duration("500:59:59.9999999").days(), 20, "500 hours overflows to 20 days");
        test.equal(moment.duration("500:59:59.9999999").hours(), 20, "500 hours overflows to 20 hours");
        test.done();
    },

    "instatiation from serialized C# TimeSpan without days or milliseconds" : function (test) {
        test.expect(6);
        test.equal(moment.duration("01:02:03").years(), 0, "0 years");
        test.equal(moment.duration("01:02:03").days(), 0, "0 days");
        test.equal(moment.duration("01:02:03").hours(), 1, "1 hour");
        test.equal(moment.duration("01:02:03").minutes(), 2, "2 minutes");
        test.equal(moment.duration("01:02:03").seconds(), 3, "3 seconds");
        test.equal(moment.duration("01:02:03").milliseconds(), 0, "0 milliseconds");
        test.done();
    },

    "instatiation from serialized C# TimeSpan without milliseconds" : function (test) {
        test.expect(6);
        test.equal(moment.duration("1.02:03:04").years(), 0, "0 years");
        test.equal(moment.duration("1.02:03:04").days(), 1, "1 day");
        test.equal(moment.duration("1.02:03:04").hours(), 2, "2 hours");
        test.equal(moment.duration("1.02:03:04").minutes(), 3, "3 minutes");
        test.equal(moment.duration("1.02:03:04").seconds(), 4, "4 seconds");
        test.equal(moment.duration("1.02:03:04").milliseconds(), 0, "0 milliseconds");
        test.done();
    },

    "instatiation from serialized C# TimeSpan maxValue" : function (test) {
        test.expect(6);
        test.equal(moment.duration("10675199.02:48:05.4775807").years(), 29653, "29653 years");
        test.equal(moment.duration("10675199.02:48:05.4775807").days(), 29, "29 day");
        test.equal(moment.duration("10675199.02:48:05.4775807").hours(), 2, "2 hours");
        test.equal(moment.duration("10675199.02:48:05.4775807").minutes(), 48, "48 minutes");
        test.equal(moment.duration("10675199.02:48:05.4775807").seconds(), 5, "5 seconds");
        test.equal(moment.duration("10675199.02:48:05.4775807").milliseconds(), 477, "477 milliseconds");
        test.done();
    },

    "instatiation from serialized C# TimeSpan minValue" : function (test) {
        test.expect(6);
        test.equal(moment.duration("-10675199.02:48:05.4775808").years(), -29653, "29653 years");
        test.equal(moment.duration("-10675199.02:48:05.4775808").days(), -29, "29 day");
        test.equal(moment.duration("-10675199.02:48:05.4775808").hours(), -2, "2 hours");
        test.equal(moment.duration("-10675199.02:48:05.4775808").minutes(), -48, "48 minutes");
        test.equal(moment.duration("-10675199.02:48:05.4775808").seconds(), -5, "5 seconds");
        test.equal(moment.duration("-10675199.02:48:05.4775808").milliseconds(), -477, "477 milliseconds");
        test.done();
    },

    "humanize" : function (test) {
        test.expect(32);
        moment.lang('en');
        test.equal(moment.duration({seconds: 44}).humanize(),  "a few seconds", "44 seconds = a few seconds");
        test.equal(moment.duration({seconds: 45}).humanize(),  "a minute",      "45 seconds = a minute");
        test.equal(moment.duration({seconds: 89}).humanize(),  "a minute",      "89 seconds = a minute");
        test.equal(moment.duration({seconds: 90}).humanize(),  "2 minutes",     "90 seconds = 2 minutes");
        test.equal(moment.duration({minutes: 44}).humanize(),  "44 minutes",    "44 minutes = 44 minutes");
        test.equal(moment.duration({minutes: 45}).humanize(),  "an hour",       "45 minutes = an hour");
        test.equal(moment.duration({minutes: 89}).humanize(),  "an hour",       "89 minutes = an hour");
        test.equal(moment.duration({minutes: 90}).humanize(),  "2 hours",       "90 minutes = 2 hours");
        test.equal(moment.duration({hours: 5}).humanize(),     "5 hours",       "5 hours = 5 hours");
        test.equal(moment.duration({hours: 21}).humanize(),    "21 hours",      "21 hours = 21 hours");
        test.equal(moment.duration({hours: 22}).humanize(),    "a day",         "22 hours = a day");
        test.equal(moment.duration({hours: 35}).humanize(),    "a day",         "35 hours = a day");
        test.equal(moment.duration({hours: 36}).humanize(),    "2 days",        "36 hours = 2 days");
        test.equal(moment.duration({days: 1}).humanize(),      "a day",         "1 day = a day");
        test.equal(moment.duration({days: 5}).humanize(),      "5 days",        "5 days = 5 days");
        test.equal(moment.duration({weeks: 1}).humanize(),     "7 days",        "1 week = 7 days");
        test.equal(moment.duration({days: 25}).humanize(),     "25 days",       "25 days = 25 days");
        test.equal(moment.duration({days: 26}).humanize(),     "a month",       "26 days = a month");
        test.equal(moment.duration({days: 30}).humanize(),     "a month",       "30 days = a month");
        test.equal(moment.duration({days: 45}).humanize(),     "a month",       "45 days = a month");
        test.equal(moment.duration({days: 46}).humanize(),     "2 months",      "46 days = 2 months");
        test.equal(moment.duration({days: 74}).humanize(),     "2 months",      "75 days = 2 months");
        test.equal(moment.duration({days: 76}).humanize(),     "3 months",      "76 days = 3 months");
        test.equal(moment.duration({months: 1}).humanize(),    "a month",       "1 month = a month");
        test.equal(moment.duration({months: 5}).humanize(),    "5 months",      "5 months = 5 months");
        test.equal(moment.duration({days: 344}).humanize(),    "11 months",     "344 days = 11 months");
        test.equal(moment.duration({days: 345}).humanize(),    "a year",        "345 days = a year");
        test.equal(moment.duration({days: 547}).humanize(),    "a year",        "547 days = a year");
        test.equal(moment.duration({days: 548}).humanize(),    "2 years",       "548 days = 2 years");
        test.equal(moment.duration({years: 1}).humanize(),     "a year",        "1 year = a year");
        test.equal(moment.duration({years: 5}).humanize(),     "5 years",       "5 years = 5 years");
        test.equal(moment.duration(7200000).humanize(),        "2 hours",       "7200000 = 2 minutes");
        test.done();
    },

    "humanize duration with suffix" : function (test) {
        test.expect(2);
        moment.lang('en');
        test.equal(moment.duration({seconds:  44}).humanize(true),  "in a few seconds", "44 seconds = a few seconds");
        test.equal(moment.duration({seconds: -44}).humanize(true),  "a few seconds ago", "44 seconds = a few seconds");
        test.done();
    },

    "bubble value up" : function (test) {
        test.expect(5);
        test.equal(moment.duration({milliseconds: 61001}).milliseconds(), 1, "61001 milliseconds has 1 millisecond left over");
        test.equal(moment.duration({milliseconds: 61001}).seconds(),      1, "61001 milliseconds has 1 second left over");
        test.equal(moment.duration({milliseconds: 61001}).minutes(),      1, "61001 milliseconds has 1 minute left over");

        test.equal(moment.duration({minutes: 350}).minutes(), 50, "350 minutes has 50 minutes left over");
        test.equal(moment.duration({minutes: 350}).hours(),   5,  "350 minutes has 5 hours left over");
        test.done();
    },

    "clipping" : function (test) {
        test.expect(18);
        test.equal(moment.duration({months: 11}).months(), 11, "11 months is 11 months");
        test.equal(moment.duration({months: 11}).years(),  0,  "11 months makes no year");
        test.equal(moment.duration({months: 12}).months(), 0,  "12 months is 0 months left over");
        test.equal(moment.duration({months: 12}).years(),  1,  "12 months makes 1 year");
        test.equal(moment.duration({months: 13}).months(), 1,  "13 months is 1 month left over");
        test.equal(moment.duration({months: 13}).years(),  1,  "13 months makes 1 year");

        test.equal(moment.duration({days: 29}).days(),   29, "29 days is 29 days");
        test.equal(moment.duration({days: 29}).months(), 0,  "29 days makes no month");
        test.equal(moment.duration({days: 30}).days(),   0,  "30 days is 0 days left over");
        test.equal(moment.duration({days: 30}).months(), 1,  "30 days is a month");
        test.equal(moment.duration({days: 31}).days(),   1,  "31 days is 1 day left over");
        test.equal(moment.duration({days: 31}).months(), 1,  "31 days is a month");

        test.equal(moment.duration({hours: 23}).hours(), 23, "23 hours is 23 hours");
        test.equal(moment.duration({hours: 23}).days(),  0,  "23 hours makes no day");
        test.equal(moment.duration({hours: 24}).hours(), 0,  "24 hours is 0 hours left over");
        test.equal(moment.duration({hours: 24}).days(),  1,  "24 hours makes 1 day");
        test.equal(moment.duration({hours: 25}).hours(), 1,  "25 hours is 1 hour left over");
        test.equal(moment.duration({hours: 25}).days(),  1,  "25 hours makes 1 day");
        test.done();
    },

    "effective equivalency" : function (test) {
        test.expect(7);
        test.deepEqual(moment.duration({seconds: 1})._data,  moment.duration({milliseconds: 1000})._data, "1 second is the same as 1000 milliseconds");
        test.deepEqual(moment.duration({seconds: 60})._data, moment.duration({minutes: 1})._data,         "1 minute is the same as 60 seconds");
        test.deepEqual(moment.duration({minutes: 60})._data, moment.duration({hours: 1})._data,           "1 hour is the same as 60 minutes");
        test.deepEqual(moment.duration({hours: 24})._data,   moment.duration({days: 1})._data,            "1 day is the same as 24 hours");
        test.deepEqual(moment.duration({days: 7})._data,     moment.duration({weeks: 1})._data,           "1 week is the same as 7 days");
        test.deepEqual(moment.duration({days: 30})._data,    moment.duration({months: 1})._data,          "1 month is the same as 30 days");
        test.deepEqual(moment.duration({months: 12})._data,  moment.duration({years: 1})._data,           "1 years is the same as 12 months");
        test.done();
    },

    "asGetters" : function (test) {
        var d = moment.duration({
            years: 2,
            months: 3,
            weeks: 2,
            days: 1,
            hours: 8,
            minutes: 9,
            seconds: 20,
            milliseconds: 12
        });

        test.expect(8);
        test.equal(d.asYears().toFixed(2),          "2.29", "years");
        test.equal(d.asMonths().toFixed(2),        "27.51", "months");
        test.equal(d.asWeeks().toFixed(2),        "119.33", "weeks");
        test.equal(d.asDays().toFixed(2),         "835.34", "days");
        test.equal(d.asHours().toFixed(2),      "20048.16", "hours");
        test.equal(d.asMinutes().toFixed(2),  "1202889.33", "minutes");
        test.equal(d.asSeconds().toFixed(2), "72173360.01", "seconds");
        test.equal(d.asMilliseconds(),         72173360012, "milliseconds");
        test.done();
    },

    "generic as getter" : function (test) {
        var d = moment.duration({
            years: 2,
            months: 3,
            weeks: 2,
            days: 1,
            hours: 8,
            minutes: 9,
            seconds: 20,
            milliseconds: 12
        });

        test.expect(24);
        test.equal(d.as("years").toFixed(2),          "2.29", "years");
        test.equal(d.as("year").toFixed(2),           "2.29", "years = year");
        test.equal(d.as("y").toFixed(2),              "2.29", "years = y");
        test.equal(d.as("months").toFixed(2),         "27.51", "months");
        test.equal(d.as("month").toFixed(2),          "27.51", "months = month");
        test.equal(d.as("M").toFixed(2),              "27.51", "months = M");
        test.equal(d.as("weeks").toFixed(2),          "119.33", "weeks");
        test.equal(d.as("week").toFixed(2),           "119.33", "weeks = week");
        test.equal(d.as("w").toFixed(2),              "119.33", "weeks = w");
        test.equal(d.as("days").toFixed(2),           "835.34", "days");
        test.equal(d.as("day").toFixed(2),            "835.34", "days = day");
        test.equal(d.as("d").toFixed(2),              "835.34", "days = d");
        test.equal(d.as("hours").toFixed(2),          "20048.16", "hours");
        test.equal(d.as("hour").toFixed(2),           "20048.16", "hours = hour");
        test.equal(d.as("h").toFixed(2),              "20048.16", "hours = h");
        test.equal(d.as("minutes").toFixed(2),        "1202889.33", "minutes");
        test.equal(d.as("minute").toFixed(2),         "1202889.33", "minutes = minute");
        test.equal(d.as("m").toFixed(2),              "1202889.33", "minutes = m");
        test.equal(d.as("seconds").toFixed(2),        "72173360.01", "seconds");
        test.equal(d.as("second").toFixed(2),         "72173360.01", "seconds = second");
        test.equal(d.as("s").toFixed(2),              "72173360.01", "seconds = s");
        test.equal(d.as("milliseconds"),              72173360012, "milliseconds");
        test.equal(d.as("millisecond"),               72173360012, "milliseconds = millisecond");
        test.equal(d.as("ms"),                        72173360012, "milliseconds = ms");
        test.done();
    },

    "isDuration" : function (test) {
        test.expect(3);
        test.ok(moment.isDuration(moment.duration(12345678)), "correctly says true");
        test.ok(!moment.isDuration(moment()), "moment object is not a duration");
        test.ok(!moment.isDuration({milliseconds: 1}), "plain object is not a duration");
        test.done();
    },

    "add" : function (test) {
        test.expect(4);

        var d = moment.duration({months: 4, weeks: 3, days: 2});
        // for some reason, d._data._months does not get updated; use d._months instead.
        test.equal(d.add(1, 'month')._months, 5, 'Add months');
        test.equal(d.add(5, 'days')._days, 28, 'Add days');
        test.equal(d.add(10000)._milliseconds, 10000, 'Add milliseconds');
        test.equal(d.add({h: 23, m: 59})._milliseconds, 23 * 60 * 60 * 1000 + 59 * 60 * 1000 + 10000, 'Add hour:minute');

        test.done();
    },

    "add and bubble" : function (test) {
        test.expect(4);

        test.equal(moment.duration(1, 'second').add(1000, 'milliseconds').seconds(), 2, 'Adding milliseconds should bubble up to seconds');
        test.equal(moment.duration(1, 'minute').add(60, 'second').minutes(), 2, 'Adding seconds should bubble up to minutes');
        test.equal(moment.duration(1, 'hour').add(60, 'minutes').hours(), 2, 'Adding minutes should bubble up to hours');
        test.equal(moment.duration(1, 'day').add(24, 'hours').days(), 2, 'Adding hours should bubble up to days');

        test.done();
    },

    "subtract and bubble" : function (test) {
        test.expect(4);

        test.equal(moment.duration(2, 'second').subtract(1000, 'milliseconds').seconds(), 1, 'Subtracting milliseconds should bubble up to seconds');
        test.equal(moment.duration(2, 'minute').subtract(60, 'second').minutes(), 1, 'Subtracting seconds should bubble up to minutes');
        test.equal(moment.duration(2, 'hour').subtract(60, 'minutes').hours(), 1, 'Subtracting minutes should bubble up to hours');
        test.equal(moment.duration(2, 'day').subtract(24, 'hours').days(), 1, 'Subtracting hours should bubble up to days');

        test.done();
    },

    "subtract" : function (test) {
        test.expect(4);

        var d = moment.duration({months: 2, weeks: 2, days: 0, hours: 5});
        // for some reason, d._data._months does not get updated; use d._months instead.
        test.equal(d.subtract(1, 'months')._months, 1, 'Subtract months');
        test.equal(d.subtract(14, 'days')._days, 0, 'Subtract days');
        test.equal(d.subtract(10000)._milliseconds, 5 * 60 * 60 * 1000 - 10000, 'Subtract milliseconds');
        test.equal(d.subtract({h: 1, m: 59})._milliseconds, 3 * 60 * 60 * 1000 + 1 * 60 * 1000 - 10000, 'Subtract hour:minute');

        test.done();
    }

};