v / vlib / time / custom_format_test.v
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1import time


2


3fn test_custom_format() {


4    date := time.now()


5    assert date.custom_format('YYYY-MM-DD HH:mm') == date.format()


6    assert date.custom_format('MMM') == date.smonth()


7


8    test_str := 'M MM Mo MMM MMMM\nD DD DDD DDDD\nd dd ddd dddd\nYY YYYY a A\nH HH h hh k kk i ii e\nm mm s ss Z ZZ ZZZ\nDo DDDo Q Qo QQ\nN NN w wo ww\nM/D/YYYY N-HH:mm:ss Qo?a'


9


10    println(date.custom_format(test_str))


11}


12


13fn test_hours() {


14    assert time.parse('2023-08-04 00:00:45')!.custom_format('ii A i a hh A h a') == '00 AM 0 am 12 AM 12 am'


15    assert time.parse('2023-08-04 01:00:45')!.custom_format('ii A i a hh A h a') == '01 AM 1 am 01 AM 1 am'


16    assert time.parse('2023-08-04 02:00:45')!.custom_format('ii A i a hh A h a') == '02 AM 2 am 02 AM 2 am'


17    assert time.parse('2023-08-04 03:00:45')!.custom_format('ii A i a hh A h a') == '03 AM 3 am 03 AM 3 am'


18    assert time.parse('2023-08-04 04:00:45')!.custom_format('ii A i a hh A h a') == '04 AM 4 am 04 AM 4 am'


19    assert time.parse('2023-08-04 05:00:45')!.custom_format('ii A i a hh A h a') == '05 AM 5 am 05 AM 5 am'


20    assert time.parse('2023-08-04 06:00:45')!.custom_format('ii A i a hh A h a') == '06 AM 6 am 06 AM 6 am'


21    assert time.parse('2023-08-04 07:00:45')!.custom_format('ii A i a hh A h a') == '07 AM 7 am 07 AM 7 am'


22    assert time.parse('2023-08-04 08:00:45')!.custom_format('ii A i a hh A h a') == '08 AM 8 am 08 AM 8 am'


23    assert time.parse('2023-08-04 09:00:45')!.custom_format('ii A i a hh A h a') == '09 AM 9 am 09 AM 9 am'


24    assert time.parse('2023-08-04 10:00:45')!.custom_format('ii A i a hh A h a') == '10 AM 10 am 10 AM 10 am'


25    assert time.parse('2023-08-04 11:00:45')!.custom_format('ii A i a hh A h a') == '11 AM 11 am 11 AM 11 am'


26    assert time.parse('2023-08-04 12:00:45')!.custom_format('ii A i a hh A h a') == '12 PM 12 pm 12 PM 12 pm'


27    assert time.parse('2023-08-04 13:00:45')!.custom_format('ii A i a hh A h a') == '01 PM 1 pm 01 PM 1 pm'


28    assert time.parse('2023-08-04 14:00:45')!.custom_format('ii A i a hh A h a') == '02 PM 2 pm 02 PM 2 pm'


29    assert time.parse('2023-08-04 15:00:45')!.custom_format('ii A i a hh A h a') == '03 PM 3 pm 03 PM 3 pm'


30    assert time.parse('2023-08-04 16:00:45')!.custom_format('ii A i a hh A h a') == '04 PM 4 pm 04 PM 4 pm'


31    assert time.parse('2023-08-04 17:00:45')!.custom_format('ii A i a hh A h a') == '05 PM 5 pm 05 PM 5 pm'


32    assert time.parse('2023-08-04 18:00:45')!.custom_format('ii A i a hh A h a') == '06 PM 6 pm 06 PM 6 pm'


33    assert time.parse('2023-08-04 19:00:45')!.custom_format('ii A i a hh A h a') == '07 PM 7 pm 07 PM 7 pm'


34    assert time.parse('2023-08-04 20:00:45')!.custom_format('ii A i a hh A h a') == '08 PM 8 pm 08 PM 8 pm'


35    assert time.parse('2023-08-04 21:00:45')!.custom_format('ii A i a hh A h a') == '09 PM 9 pm 09 PM 9 pm'


36    assert time.parse('2023-08-04 22:00:45')!.custom_format('ii A i a hh A h a') == '10 PM 10 pm 10 PM 10 pm'


37    assert time.parse('2023-08-04 23:00:45')!.custom_format('ii A i a hh A h a') == '11 PM 11 pm 11 PM 11 pm'


38}


39


40fn test_hours_k_and_kk() {


41    test_time := time.Time{


42        year:       2024


43        month:      7


44        day:        15


45        hour:       14


46        minute:     30


47        second:     45


48        nanosecond: 123456789


49    }


50    assert test_time.custom_format('MM.DD.YYYY k:mm:ss') == '07.15.2024 14:30:45'


51    assert test_time.custom_format('MM.DD.YYYY kk:mm:ss') == '07.15.2024 14:30:45'


52}


53


54fn test_zero_date() {


55    zero_date := time.Time{}


56    res :=


57        zero_date.custom_format('M MM Mo MMM MMMM |1| D DD DDD DDDD |2| d dd ddd dddd |3| YY YYYY a A |4| H HH h hh k kk i ii e |5| m mm s ss |6| Do DDDo Q Qo QQ |7| N NN |8| M/D/YYYY N-HH:mm:ss Qo?a')


58    assert res == '0 00 0th Jan January |1| 0 00 0 000 |2| -1 Mo Mon Monday |3|  0 am AM |4| 0 00 12 12 24 24 0 00 e |5| 0 00 0 00 |6| 0th 0th 1 1st 01 |7| AD Anno Domini |8| 0/0/0 AD-00:00:00 1st?am'


59}


60


61fn test_quarter() {


62    pattern := '2025-xx-27t12:34:56z'


63    expect := [1, 1, 1, 2, 2, 2, 3, 3, 3, 4, 4, 4]


64    mut want := []int{len: 12}


65    for n in 0 .. 12 {


66        tt := time.parse_rfc3339(pattern.replace('xx', '${n + 1:02}'))!


67        want[n] = tt.custom_format('Q').int()


68    }


69    assert want == expect


70


71    turing := time.parse_format('1912-06-23', 'YYYY-MM-DD')! // Alan Turing was born


72    assert turing.custom_format('Qo') == '2nd'


73    mccarthy := time.parse_format('1927-09-04', 'YYYY-MM-DD')! // John McCarthy was born


74    assert mccarthy.custom_format('QQ') == '03'


75}


76