+ 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)