From: Greg.mpls@... Date: 2017-05-27T18:39:09+00:00 Subject: [ruby-core:81423] [Ruby trunk Bug#13591] spec/rubyspec/core/time/zone_spec - Windows does not support ENV['TZ'] Issue #13591 has been updated by MSP-Greg (Greg L). Usaku, You are correct. Linked from the page you mentioned is [_tzset](https://msdn.microsoft.com/en-us/library/90s5c885.aspx). This (sort of) doc's what ENV['TZ'] can be set to. From my testing, the strings can be anything. I called the following with several strings. ``` puts "TZ DST SST" def tz_test(s) dst = [2017, 6, 1, 12, 0] # daylight - June sst = [2017, 1, 1, 12, 0] # standard - January ENV['TZ'] = s puts "#{s.ljust(10)} #{(Time.new(*dst).utc_offset/3600).to_s.rjust(4)} #{(Time.new(*sst).utc_offset/3600).to_s.rjust(4)}" end ``` output below. ``` TZ DST SST hello-foo 1 0 hello+foo 1 0 1,2 0 0 Sun,Fri,2 1 0 12 0 0 -1aaa 1 0 aaa+8 -8 -8 AAA+8 -8 -8 aaa+8bbb -7 -8 AAAA+8BBBB 1 0 aaa-8 8 8 AAA-8 8 8 aaa-8bbb 9 8 AAAA-8BBBB 1 0 ``` A classic case of a function that assumes you have validated the input, and, if not, be prepared for anything. My opinion, Ruby mingw and mswin builds are fine, the `_tzset` function is expecting validation that ruby can't or shouldn't do. There's a gem for that... ---------------------------------------- Bug #13591: spec/rubyspec/core/time/zone_spec - Windows does not support ENV['TZ'] https://bugs.ruby-lang.org/issues/13591#change-65134 * Author: MSP-Greg (Greg L) * Status: Feedback * Priority: Normal * Assignee: Eregon (Benoit Daloze) * Target version: * ruby -v: ruby 2.5.0dev (2017-05-27 trunk 58911) [x64-mswin64_140] * Backport: 2.2: UNKNOWN, 2.3: UNKNOWN, 2.4: UNKNOWN ---------------------------------------- Windows does not support ENV['TZ'], so it should be removed from rspec tests. See [GitHub PR 1627](https://github.com/ruby/ruby/pull/1627) -- https://bugs.ruby-lang.org/ Unsubscribe: