describe ( "Timetable library" , function ( ) local timetable = require "luatz.timetable" local function native_normalise ( year , month , day ) return os.date("*t",os.time{ year = year ; month = month ; day = day ; }) end it ( "#is_leap is correct" , function ( ) assert.same ( false , timetable.is_leap ( 1 ) ) assert.same ( false , timetable.is_leap ( 3 ) ) assert.same ( true , timetable.is_leap ( 4 ) ) assert.same ( true , timetable.is_leap ( 2000 ) ) assert.same ( true , timetable.is_leap ( 2004 ) ) assert.same ( true , timetable.is_leap ( 2012 ) ) assert.same ( false , timetable.is_leap ( 2013 ) ) assert.same ( false , timetable.is_leap ( 2014 ) ) assert.same ( false , timetable.is_leap ( 2100 ) ) assert.same ( true , timetable.is_leap ( 2400 ) ) end ) it ( "#normalise gets #wday (day of week) correct" , function ( ) local function assert_same_wday ( year , month , day ) return assert.are.same ( native_normalise ( year , month , day ).wday , timetable.new ( year , month , day ):normalise().wday ) end assert_same_wday ( 2013 , 7 , 23 ) assert_same_wday ( 2013 , 7 , 24 ) assert_same_wday ( 2013 , 7 , 25 ) assert_same_wday ( 2013 , 7 , 26 ) assert_same_wday ( 2013 , 7 , 27 ) assert_same_wday ( 2013 , 7 , 28 ) assert_same_wday ( 2013 , 7 , 29 ) assert_same_wday ( 2014 , 1 , 1 ) assert_same_wday ( 2014 , 1 , 6 ) assert_same_wday ( 2016 , 2 , 28 ) assert_same_wday ( 2016 , 2 , 29 ) assert_same_wday ( 2016 , 3 , 1 ) end ) local function native_timestamp ( year , month , day ) return assert ( tonumber ( assert ( io.popen ( string.format('date -u -d "%d-%d-%d" +%%s', year , month , day ) ) ):read "*l" ) ) end it ( "#timestamp creation is valid" , function ( ) for y=1950,2013 do for m=1,12 do assert.same ( native_timestamp ( y,m,1 ) , timetable.timestamp(y,m,1,0,0,0) ) end end end ) it ( "#normalise handles out of range days in a year" , function ( ) assert.same ( { timetable.normalise(2013,1,366,0,0,0) } , { 2014,1,1,0,0,0 } ) assert.same ( { timetable.normalise(2013,1,400,0,0,0) } , { 2014,2,4,0,0,0 } ) assert.same ( { timetable.normalise(2016,1,400,0,0,0) } , { 2017,2,3,0,0,0 } ) assert.same ( { timetable.normalise(2015,1,430,0,0,0) } , { 2016,3,5,0,0,0 } ) assert.same ( { timetable.normalise(2016,1,430,0,0,0) } , { 2017,3,5,0,0,0 } ) assert.same ( { timetable.normalise(2000,1,10000,0,0,0) } , { 2027,5,18,0,0,0 } ) assert.same ( { timetable.normalise(2000,1,10000000,0,0,0) } , { 29379,1,25,0,0,0 } ) end ) it ( "#normalise handles out of range days in a #month" , function ( ) assert.same ( { timetable.normalise(2013,0,1,0,0,0) } , { 2012,12,1,0,0,0 } ) assert.same ( { timetable.normalise(2013,42,1,0,0,0) } , { 2016,6,1,0,0,0 } ) -- Correct behaviour around leap days assert.same ( { timetable.normalise(2012,2,52,0,0,0) } , { 2012,3,23,0,0,0 } ) assert.same ( { timetable.normalise(2013,2,52,0,0,0) } , { 2013,3,24,0,0,0 } ) assert.same ( { timetable.normalise(2012,3,-2,0,0,0) } , { 2012,2,26,0,0,0 } ) assert.same ( { timetable.normalise(2013,3,-2,0,0,0) } , { 2013,2,27,0,0,0 } ) -- Also when more fields are out of range assert.same ( { timetable.normalise(2013,42,52,0,0,0) } , { 2016,7,22,0,0,0 } ) assert.same ( { timetable.normalise(2013,42,52,50,0,0) } , { 2016,7,24,2,0,0 } ) end ) it ( "#normalise handles fractional #month" , function ( ) assert.same ( { timetable.normalise(2014,14.5,1,0,0,0) } , { 2015,2,15,0,0,0 } ) assert.same ( { timetable.normalise(2015,14.5,1,0,0,0) } , { 2016,2,15,12,0,0 } ) -- leap year, so hours is 12 assert.same ( { timetable.normalise(2016,14.5,1,0,0,0) } , { 2017,2,15,0,0,0 } ) end ) local function round_trip_add(t, field, x) local before = t:clone() t[field]=t[field]+x; t:normalise(); t[field]=t[field]-x; t:normalise(); assert.same(0, t-before) end it ( "#normalise round trips" , function ( ) round_trip_add(timetable.new(2000,2,28,0,0,0), "month", 0.5) round_trip_add(timetable.new(2014,8,28,19,23,0), "month", 0.4) round_trip_add(timetable.new(2014,14.5,28,0,0,0), "month", 0.4) end ) end )