readable-range-test.js

describe("preciseDiff", function() {
    function test(d1, d2, result) {
        expect(moment.preciseDiff(moment(d1, 'YYYY-MM-DD HH:mm:ss'), moment(d2, 'YYYY-MM-DD HH:mm:ss'))).toBe(result);
    }

    describe("order", function() {
        it("same date", function() {
            test('2013-01-01 00:00:00', '2013-01-01 00:00:00', '');
        });

        it("first date after second", function() {
            test('2013-01-01 00:00:01', '2013-01-01 00:00:00', '1 second');
        });

        it("second date after first", function() {
            test('2013-01-01 00:00:00', '2013-01-01 00:00:01', '1 second');
        });
    });

    describe("single/plural", function() {
        it("multiple seconds", function() {
            test('2013-01-01 00:00:00', '2013-01-01 00:00:02', '2 seconds');
        });

        it("one minute", function() {
            test('2013-01-01 00:00:00', '2013-01-01 00:01:00', '1 minute');
        })

        it("multiple minutes", function() {
            test('2013-01-01 00:00:00', '2013-01-01 00:02:00', '2 minutes');
        })

        it("one hour", function() {
            test('2013-01-01 00:00:00', '2013-01-01 01:00:00', '1 hour');
        })

        it("multiple hours", function() {
            test('2013-01-01 00:00:00', '2013-01-01 02:00:00', '2 hours');
        })

        it("one day", function() {
            test('2013-01-01 00:00:00', '2013-01-02 00:00:00', '1 day');
        })

        it("multiple days", function() {
            test('2013-01-01 00:00:00', '2013-01-03 00:00:00', '2 days');
        })

        it("one month", function() {
            test('2013-01-01 00:00:00', '2013-02-01 00:00:00', '1 month');
        })

        it("multiple months", function() {
            test('2013-01-01 00:00:00', '2013-03-01 00:00:00', '2 months');
        })

        it("one year", function() {
            test('2013-01-01 00:00:00', '2014-01-01 00:00:00', '1 year');
        })

        it("multiple years", function() {
            test('2013-01-01 00:00:00', '2015-01-01 00:00:00', '2 years');
        })
    });

    describe("counting back", function() {
        it("seconds", function() {
            test('2013-01-01 00:02:10', '2013-01-01 00:03:05', '55 seconds');
        });
        it("minutes", function() {
            test('2013-01-01 02:10:00', '2013-01-01 03:05:00', '55 minutes');
        });
        it("hours", function() {
            test('2013-01-01 23:00:00', '2013-01-02 01:00:00', '2 hours');
        });
        it("days", function() {
            test('2013-01-20 00:00:00', '2013-02-10 00:00:00', '21 days');
        });
        it("months", function() {
            test('2013-11-01 00:00:00', '2014-02-01 00:00:00', '3 months');
        });
    });

    describe("days across month boundaries", function() {
        it("start month has more days than last full month", function() {
            test('2013-01-31 00:00:00', '2013-03-01 00:00:00', '1 month 1 day');
            test('2013-01-30 00:00:00', '2013-03-01 00:00:00', '1 month 1 day');
            test('2013-01-29 00:00:00', '2013-03-01 00:00:00', '1 month 1 day');
            test('2013-01-28 00:00:00', '2013-03-01 00:00:00', '1 month 1 day');
            test('2013-01-27 00:00:00', '2013-03-01 00:00:00', '1 month 2 days');

            test('2013-05-31 00:00:00', '2013-07-01 00:00:00', '1 month 1 day');
            test('2013-05-30 00:00:00', '2013-07-01 00:00:00', '1 month 1 day');
            test('2013-05-29 00:00:00', '2013-07-01 00:00:00', '1 month 2 days');
        });
        it("start month has fewer days than last full month", function() {
            test('2013-04-29 00:00:00', '2013-08-01 00:00:00', '3 months 3 days');
            test('2013-04-30 00:00:00', '2013-08-01 00:00:00', '3 months 2 days');
            // no way to get '3 months 1 day' to 2013-08-01 
        });
        it("start month has same days as last full month", function() {
            test('2013-05-30 00:00:00', '2013-08-01 00:00:00', '2 months 2 days');
            test('2013-05-31 00:00:00', '2013-08-01 00:00:00', '2 months 1 day');
        });
    });

    describe("combinations", function() {
        it("all values", function() {
            test('2001-11-12 13:01:43', '2014-02-01 01:03:01', '12 years 2 months 19 days 12 hours 1 minute 18 seconds');
        });
        it("multiple values", function() {
            test('2013-10-21 10:15:40', '2014-02-02 01:01:01', '3 months 11 days 14 hours 45 minutes 21 seconds');
            test('2013-12-31 23:58:10', '2014-01-01 00:02:08', '3 minutes 58 seconds');
            test('2013-12-31 04:08:20', '2014-01-01 01:02:03', '20 hours 53 minutes 43 seconds');
            test('2013-12-27 05:10:20', '2014-01-02 06:12:30', '6 days 1 hour 2 minutes 10 seconds');
            test('2013-10-21 10:15:40', '2014-02-02 01:01:01', '3 months 11 days 14 hours 45 minutes 21 seconds');
            test('2013-11-02 01:00:40', '2014-02-02 01:01:01', '3 months 21 seconds');
        });
    });
});