diff options
Diffstat (limited to 'erts')
| -rw-r--r-- | erts/emulator/test/time_SUITE.erl | 77 |
1 files changed, 19 insertions, 58 deletions
diff --git a/erts/emulator/test/time_SUITE.erl b/erts/emulator/test/time_SUITE.erl index 76d440529f..87b8c62cfa 100644 --- a/erts/emulator/test/time_SUITE.erl +++ b/erts/emulator/test/time_SUITE.erl @@ -209,23 +209,17 @@ test_seconds_to_univ([]) -> %% Test that the the different time functions return -%% consistent results. (See the test case for assumptions -%% and limitations.) -consistency(Config) when is_list(Config) -> - %% Test the following equations: - %% date() & time() == erlang:localtime() - %% erlang:universaltime() + timezone == erlang:localtime() +%% consistent results. +consistency(_Config) -> + %% Test that: + %% * date() & time() gives the same time as erlang:localtime() %% - %% Assumptions: - %% Middle-European time zone, EU rules for daylight-saving time. - %% - %% Limitations: - %% Localtime and universaltime must be in the same month. - %% Daylight-saving calculations are incorrect from the last - %% Sunday of March and October to the end of the month. + %% * the difference between erlang:universaltime() and + %% erlang:localtime() is reasonable (with assuming any + %% particular timezone) ok = compare_date_time_and_localtime(16), - ok = compare_local_and_universal(16). + compare_local_and_universal(16). compare_date_time_and_localtime(Times) when Times > 0 -> {Year, Mon, Day} = date(), @@ -238,22 +232,18 @@ compare_date_time_and_localtime(0) -> error. compare_local_and_universal(Times) when Times > 0 -> - case compare(erlang:universaltime(), erlang:localtime()) of - true -> ok; - false -> compare_local_and_universal(Times-1) - end; -compare_local_and_universal(0) -> - error. + Utc = erlang:universaltime(), + Local = erlang:localtime(), + io:format("local = ~p, utc = ~p", [Local,Utc]), -compare(Utc0, Local) -> - io:format("local = ~p, utc = ~p", [Local, Utc0]), - Utc = linear_time(Utc0)+effective_timezone(Utc0)*3600, - case linear_time(Local) of - Utc -> true; - Other -> - io:format("Failed: local = ~p, utc = ~p~n", - [Other, Utc]), - false + AcceptableDiff = 14*3600, + case linear_time(Utc) - linear_time(Local) of + Diff when abs(Diff) < AcceptableDiff -> + ok; + Diff -> + io:format("More than ~p seconds difference betwen " + "local and universal time", [Diff]), + ct:fail(huge_diff) end. %% This function converts a date and time to a linear time. @@ -280,35 +270,6 @@ days_in_february(Year) -> _ -> 28 end. -%% This functions returns either the normal timezone or the -%% the DST timezone, depending on the given UTC time. -%% -%% XXX This function uses an approximation of the EU rule for -%% daylight saving time. This function will fail in the -%% following intervals: After the last Sunday in March upto -%% the end of March, and after the last Sunday in October -%% upto the end of October. - -effective_timezone(Time) -> - case os:type() of - {unix,_} -> - case os:cmd("date '+%Z'") of - "SAST"++_ -> - 2; - _ -> - effective_timezone1(Time) - end; - _ -> - effective_timezone1(Time) - end. - -effective_timezone1({{_Year,Mon,_Day}, _}) when Mon < 4 -> - ?timezone; -effective_timezone1({{_Year,Mon,_Day}, _}) when Mon > 10 -> - ?timezone; -effective_timezone1(_) -> - ?dst_timezone. - %% Test (the bif) os:timestamp/0, which is something quite like, but not %% similar to erlang:now... |