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-rw-r--r--lib/stdlib/test/calendar_SUITE.erl22
1 files changed, 18 insertions, 4 deletions
diff --git a/lib/stdlib/test/calendar_SUITE.erl b/lib/stdlib/test/calendar_SUITE.erl
index 81b0299118..8192d035ca 100644
--- a/lib/stdlib/test/calendar_SUITE.erl
+++ b/lib/stdlib/test/calendar_SUITE.erl
@@ -28,7 +28,8 @@
day_of_the_week_calibrate/1,
leap_years/1,
last_day_of_the_month/1,
- local_time_to_universal_time_dst/1]).
+ local_time_to_universal_time_dst/1,
+ iso_week_number/1]).
-define(START_YEAR, 1947).
-define(END_YEAR, 2012).
@@ -38,7 +39,7 @@ suite() -> [{ct_hooks,[ts_install_cth]}].
all() ->
[gregorian_days, gregorian_seconds, day_of_the_week,
day_of_the_week_calibrate, leap_years,
- last_day_of_the_month, local_time_to_universal_time_dst].
+ last_day_of_the_month, local_time_to_universal_time_dst, iso_week_number].
groups() ->
[].
@@ -55,7 +56,6 @@ init_per_group(_GroupName, Config) ->
end_per_group(_GroupName, Config) ->
Config.
-
gregorian_days(doc) ->
"Tests that date_to_gregorian_days and gregorian_days_to_date "
"are each others inverses from ?START_YEAR-01-01 up to ?END_YEAR-01-01. "
@@ -170,6 +170,15 @@ local_time_to_universal_time_dst_x(Config) when is_list(Config) ->
{comment,"Bug in mktime() in this OS"}
end.
+iso_week_number(doc) ->
+ "Test the iso week number calculation for all three possibilities."
+ " When the date falls on the last week of the previous year,"
+ " when the date falls on a week within the given year and finally,"
+ " when the date falls on the first week of the next year.";
+iso_week_number(suite) ->
+ [];
+iso_week_number(Config) when is_list(Config) ->
+ ?line check_iso_week_number().
%%
%% LOCAL FUNCTIONS
@@ -259,7 +268,12 @@ check_last_day_of_the_month({SYr, SMon}, {EYr, EMon}) when SYr < EYr ->
check_last_day_of_the_month(_, _) ->
ok.
-
+%% check_iso_week_number
+%%
+check_iso_week_number() ->
+ ?line {2004, 53} = calendar:iso_week_number({2005, 1, 1}),
+ ?line {2007, 1} = calendar:iso_week_number({2007, 1, 1}),
+ ?line {2009, 1} = calendar:iso_week_number({2008, 12, 29}).