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-rw-r--r--lib/stdlib/test/calendar_SUITE.erl24
1 files changed, 21 insertions, 3 deletions
diff --git a/lib/stdlib/test/calendar_SUITE.erl b/lib/stdlib/test/calendar_SUITE.erl
index 20053dfe54..52c3cc68eb 100644
--- a/lib/stdlib/test/calendar_SUITE.erl
+++ b/lib/stdlib/test/calendar_SUITE.erl
@@ -1,7 +1,7 @@
%%
%% %CopyrightBegin%
%%
-%% Copyright Ericsson AB 1997-2016. All Rights Reserved.
+%% Copyright Ericsson AB 1997-2018. All Rights Reserved.
%%
%% Licensed under the Apache License, Version 2.0 (the "License");
%% you may not use this file except in compliance with the License.
@@ -30,7 +30,8 @@
leap_years/1,
last_day_of_the_month/1,
local_time_to_universal_time_dst/1,
- iso_week_number/1]).
+ iso_week_number/1,
+ system_time/1]).
-define(START_YEAR, 1947).
-define(END_YEAR, 2012).
@@ -40,7 +41,8 @@ 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, iso_week_number].
+ last_day_of_the_month, local_time_to_universal_time_dst,
+ iso_week_number, system_time].
groups() ->
[].
@@ -157,6 +159,22 @@ local_time_to_universal_time_dst_x(Config) when is_list(Config) ->
iso_week_number(Config) when is_list(Config) ->
check_iso_week_number().
+system_time(Config) when is_list(Config) ->
+ EpochDate = {{1970,1,1}, {0,0,0}},
+ Epoch = calendar:datetime_to_gregorian_seconds(EpochDate),
+ Y0 = {{0,1,1},{0,0,0}},
+
+ EpochDate = calendar:system_time_to_universal_time(0, second),
+ 0 = calendar:datetime_to_gregorian_seconds(Y0),
+ Y0 = calendar:system_time_to_universal_time(-Epoch, second),
+
+ T = erlang:system_time(second),
+ UDate = calendar:system_time_to_universal_time(T, second),
+ LDate = erlang:universaltime_to_localtime(UDate),
+ LDate = calendar:system_time_to_local_time(T, second),
+
+ ok.
+
%%
%% LOCAL FUNCTIONS
%%