spec/timetable_spec.lua

   1 describe("Timetable library", function()
   2         local timetable = require "luatz.timetable"
   3
   4         local function native_normalise(year, month, day)
   5                 return os.date("*t",os.time {
   6                         year = year;
   7                         month = month;
   8                         day = day;
   9                 })
  10         end
  11
  12         it("#is_leap is correct", function()
  13                 assert.same(false, timetable.is_leap(1))
  14                 assert.same(false, timetable.is_leap(3))
  15                 assert.same(true , timetable.is_leap(4))
  16                 assert.same(true , timetable.is_leap(2000))
  17                 assert.same(true , timetable.is_leap(2004))
  18                 assert.same(true , timetable.is_leap(2012))
  19                 assert.same(false, timetable.is_leap(2013))
  20                 assert.same(false, timetable.is_leap(2014))
  21                 assert.same(false, timetable.is_leap(2100))
  22                 assert.same(true , timetable.is_leap(2400))
  23         end)
  24
  25         it("#normalise gets #wday (day of week) correct", function()
  26
  27                 local function assert_same_wday(year, month, day)
  28                         return assert.are.same(
  29                                 native_normalise(year, month, day).wday,
  30                                 timetable.new(year, month, day):normalise().wday
  31                         )
  32                 end
  33
  34                 assert_same_wday(2013, 7, 23)
  35                 assert_same_wday(2013, 7, 24)
  36                 assert_same_wday(2013, 7, 25)
  37                 assert_same_wday(2013, 7, 26)
  38                 assert_same_wday(2013, 7, 27)
  39                 assert_same_wday(2013, 7, 28)
  40                 assert_same_wday(2013, 7, 29)
  41                 assert_same_wday(2014, 1, 1)
  42                 assert_same_wday(2014, 1, 6)
  43                 assert_same_wday(2016, 2, 28)
  44                 assert_same_wday(2016, 2, 29)
  45                 assert_same_wday(2016, 3, 1)
  46         end)
  47
  48         local function native_timestamp(year, month, day)
  49                 return assert(tonumber(assert(io.popen(
  50                                                 string.format('date -u -d "%d-%d-%d" +%%s', year, month, day)
  51                                         )):read "*l"))
  52         end
  53
  54         it("#timestamp creation is valid", function()
  55                 for y=1950,2013 do
  56                         for m=1,12 do
  57                                 assert.same(native_timestamp(y,m,1), timetable.timestamp(y,m,1,0,0,0))
  58                         end
  59                 end
  60         end)
  61
  62         it("#normalise handles out of range days in a year", function()
  63                 assert.same({2014,1,1,0,0,0}, {timetable.normalise(2013,1,366,0,0,0)})
  64                 assert.same({2014,2,4,0,0,0}, {timetable.normalise(2013,1,400,0,0,0)})
  65                 assert.same({2017,2,3,0,0,0}, {timetable.normalise(2016,1,400,0,0,0)})
  66                 assert.same({2016,3,5,0,0,0}, {timetable.normalise(2015,1,430,0,0,0)})
  67                 assert.same({2017,3,5,0,0,0}, {timetable.normalise(2016,1,430,0,0,0)})
  68                 assert.same({2027,5,18,0,0,0}, {timetable.normalise(2000,1,10000,0,0,0)})
  69                 assert.same({29379,1,25,0,0,0}, {timetable.normalise(2000,1,10000000,0,0,0)})
  70         end)
  71
  72         it("#normalise handles out of range days in a #month", function()
  73                 assert.same({2012,12,1,0,0,0}, {timetable.normalise(2013,0,1,0,0,0)})
  74                 assert.same({2016,6,1,0,0,0}, {timetable.normalise(2013,42,1,0,0,0)})
  75
  76                 -- Correct behaviour around leap days
  77                 assert.same({2012,3,23,0,0,0}, {timetable.normalise(2012,2,52,0,0,0)})
  78                 assert.same({2013,3,24,0,0,0}, {timetable.normalise(2013,2,52,0,0,0)})
  79
  80                 assert.same({2012,2,27,0,0,0}, {timetable.normalise(2012,3,-2,0,0,0)})
  81                 assert.same({2013,2,26,0,0,0}, {timetable.normalise(2013,3,-2,0,0,0)})
  82
  83                 -- Also when more fields are out of range
  84                 assert.same({2016,7,22,0,0,0}, {timetable.normalise(2013,42,52,0,0,0)})
  85                 assert.same({2016,7,24,2,0,0}, {timetable.normalise(2013,42,52,50,0,0)})
  86         end)
  87
  88         it("#normalise handles fractional #month", function()
  89                 assert.same({2015,2,15,0,0,0}, {timetable.normalise(2014,14.5,1,0,0,0)})
  90                 assert.same({2016,2,15,12,0,0}, {timetable.normalise(2015,14.5,1,0,0,0)}) -- leap year, so hours is 12
  91                 assert.same({2017,2,15,0,0,0}, {timetable.normalise(2016,14.5,1,0,0,0)})
  92         end)
  93
  94         it("#normalise handles negative carry (issue #10)", function()
  95                 assert.same({1970,01,01,00,59,00}, {timetable.normalise(1970,01,01,01,00,-60)})
  96                 assert.same({1970,01,01,00,58,58}, {timetable.normalise(1970,01,01,01,00,-62)})
  97                 assert.same({1969,12,31,23,55,58}, {timetable.normalise(1970,01,01,01,-63,-62)})
  98                 assert.same({2017,02,3,0,0,0}, {timetable.normalise(2017,02,13,0,-14400,0)})
  99         end)
 100
 101         it("#normalise handles negative day carry (issue #13)", function()
 102                 assert.same({2016,11,30,00,00,00}, {timetable.normalise(2016,12,0,0,0,0)})
 103                 assert.same({2017,11,30,00,00,00}, {timetable.normalise(2017,12,0,0,0,0)})
 104                 assert.same({2018,11,30,00,00,00}, {timetable.normalise(2018,12,0,0,0,0)})
 105         end)
 106
 107         local function round_trip_add(t, field, x)
 108                 local before = t:clone()
 109                 t[field]=t[field]+x;
 110                 t:normalise();
 111                 t[field]=t[field]-x;
 112                 t:normalise();
 113                 assert.same(0, t-before)
 114         end
 115         it("#normalise round trips", function()
 116                 round_trip_add(timetable.new(2000,2,28,0,0,0), "month", 0.5)
 117                 round_trip_add(timetable.new(2014,8,28,19,23,0), "month", 0.4)
 118                 round_trip_add(timetable.new(2014,14.5,28,0,0,0), "month", 0.4)
 119         end)
 120
 121         it("#rfc_3339 works with fractional milliseconds", function()
 122                 -- on lua 5.3 this used to throw an error due to milliseconds not being an integer
 123                 timetable.new_from_timestamp(1415141759.999911111):rfc_3339()
 124         end)
 125
 126         it("#rfc_3339 doesn't round seconds up to 60 (issue #4)", function()
 127                 assert.same("2014-11-04T22:55:59.999", timetable.new_from_timestamp(1415141759.999911111):rfc_3339())
 128                 assert.same("1970-01-01T00:00:59.999", timetable.new_from_timestamp(59.9999999):rfc_3339())
 129                 assert.same("1969-12-31T23:59:59.999", timetable.new_from_timestamp(-0.001):rfc_3339())
 130                 assert.same("1969-12-31T23:59:00.000", timetable.new_from_timestamp(-59.9999999):rfc_3339())
 131         end)
 132 end)