luatz/timetable: Fix `rfc_3339()` bad rounding behaviour. Closes issue #4

diff --git a/luatz/timetable.lua b/luatz/timetable.lua
index fc89fcaec5c7271d6756ed4c3ff0429e01ff7280..7058d7f5cfbac828f0a5fd4f3d776d3309446e94 100644 (file)
--- a/luatz/timetable.lua
+++ b/luatz/timetable.lua
@@ -171,8 +171,9 @@ function timetable_methods:timestamp ( )
 end
 
 function timetable_methods:rfc_3339 ( )
-       -- %06.3f gives 3 (=6-3) digits after decimal
-       return strformat ( "%04u-%02u-%02uT%02u:%02u:%06.3f" , self:unpack ( ) )
+       local year , month , day , hour , min , sec = self:unpack ( )
+       local sec , msec = borrow ( sec , 0 , 1000 )
+       return strformat ( "%04u-%02u-%02uT%02u:%02u:%02d.%03d" , year , month , day , hour , min , sec , msec )
 end
 
 function timetable_methods:strftime ( format_string )

diff --git a/spec/timetable_spec.lua b/spec/timetable_spec.lua
index 569864fc8beba43faeee83a8a036fcce84c9bc86..7f6c7041a5ca6b8d86d576d522ed902494e224d1 100644 (file)
--- a/spec/timetable_spec.lua
+++ b/spec/timetable_spec.lua
@@ -104,4 +104,11 @@ describe ( "Timetable library" , function ( )
                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 )
+
+       it("#rfc_3339 doesn't round seconds up to 60 (issue #4)", function()
+               assert.same("2014-11-04T22:55:59.999", timetable.new_from_timestamp(1415141759.999911111):rfc_3339())
+               assert.same("1970-01-01T00:00:59.999", timetable.new_from_timestamp(59.9999999):rfc_3339())
+               assert.same("1969-12-31T23:59:59.999", timetable.new_from_timestamp(-0.001):rfc_3339())
+               assert.same("1969-12-31T23:59:00.000", timetable.new_from_timestamp(-59.9999999):rfc_3339())
+       end)
 end )