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doc/timetable: Document `normalise` fractional behaviour
[etc/awesome.git] / spec / timetable_spec.lua
diff --git a/spec/timetable_spec.lua b/spec/timetable_spec.lua
index 653645921fbbc5aa876b66304b6f2b4ece8c7c33..569864fc8beba43faeee83a8a036fcce84c9bc86 100644 (file)
--- a/spec/timetable_spec.lua
+++ b/spec/timetable_spec.lua
@@ -1,37 +1,107 @@
-describe ( "Time table library" , function ( )
-       local timetable = require "timetable"
+describe ( "Timetable library" , function ( )
+       local timetable = require "luatz.timetable"
 
 
-       it ( "Doomsday calculation" , function ( )
-               local doomsday = timetable.doomsday
+       local function native_normalise ( year , month , day )
+               return os.date("*t",os.time{
+                       year = year ;
+                       month = month ;
+                       day = day ;
+               })
+       end
 
 
-               -- Doomsday in Gregorian calendar for 2013 is Thursday.
-               assert.are.same ( 5 , doomsday(2013) )
+       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.are.same ( 3 , doomsday(1967) )
-               assert.are.same ( 5 , doomsday(1968) )
+               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 )
 
        end )
 
-       it ( "Get day of week correct" , function ( )
-               local function native_normalise ( tbl )
-                       return os.date("*t",os.time(tbl))
+       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
-               local tbl = {
-                       year = 2013 ;
-                       month = 7 ;
-                       day = 23 ;
-               }
-               assert.are.same ( native_normalise ( tbl ).wday  , timetable.normalise ( tbl ).wday )
-               tbl.day=24
-               assert.are.same ( native_normalise ( tbl ).wday  , timetable.normalise ( tbl ).wday )
-               tbl.day=25
-               assert.are.same ( native_normalise ( tbl ).wday  , timetable.normalise ( tbl ).wday )
-               tbl.day=26
-               assert.are.same ( native_normalise ( tbl ).wday  , timetable.normalise ( tbl ).wday )
-               tbl.day=27
-               assert.are.same ( native_normalise ( tbl ).wday  , timetable.normalise ( tbl ).wday )
-               tbl.day=28
-               assert.are.same ( native_normalise ( tbl ).wday  , timetable.normalise ( tbl ).wday )
-               tbl.day=29
-               assert.are.same ( native_normalise ( tbl ).wday  , timetable.normalise ( tbl ).wday )
+       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 )
        end )
 end )
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