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 )