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Time.local instances: Adding 24.hours across the DST boundary adds 24 hours instead of one day [#2066 state:resolved]

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Michael Curtis 2009-03-10 12:14:54 -05:00 committed by Geoff Buesing
parent dd2eb1ea7c
commit 5a8b481f71
4 changed files with 36 additions and 27 deletions
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5
activesupport/CHANGELOG
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@ -1,3 +1,8 @@
*Edge
* Time.local instances: Adding 24.hours across the DST boundary adds 24 hours instead of one day #2066 [Michael Curtis]
*2.3.2 [Final] (March 15, 2009)*
* XmlMini supports LibXML and Nokogiri backends. #2084, #2190 [Bart ten Brinke, Aaron Patterson]

14
activesupport/lib/active_support/core_ext/time/calculations.rb
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@ -116,22 +116,14 @@ def advance(options)
seconds_to_advance == 0 ? time_advanced_by_date : time_advanced_by_date.since(seconds_to_advance)
end
# Returns a new Time representing the time a number of seconds ago, this is basically a wrapper around the Numeric extension
# Returns a new Time representing the time a number of seconds ago
def ago(seconds)
self.since(-seconds)
end
# Returns a new Time representing the time a number of seconds since the instance time, this is basically a wrapper around
# the Numeric extension.
# Returns a new Time representing the time a number of seconds since the instance time
def since(seconds)
f = seconds.since(self)
if ActiveSupport::Duration === seconds
f
else
initial_dst = self.dst? ? 1 : 0
final_dst = f.dst? ? 1 : 0
(seconds.abs >= 86400 && initial_dst != final_dst) ? f + (initial_dst - final_dst).hours : f
end
self + seconds
rescue
self.to_datetime.since(seconds)
end

12
activesupport/test/core_ext/duration_test.rb
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@ -110,6 +110,18 @@ def test_since_and_ago_anchored_to_time_zone_now_when_time_zone_default_set
Time.zone_default = nil
end
def test_adding_hours_across_dst_boundary
with_env_tz 'CET' do
assert_equal Time.local(2009,3,29,0,0,0) + 24.hours, Time.local(2009,3,30,1,0,0)
end
end
def test_adding_day_across_dst_boundary
with_env_tz 'CET' do
assert_equal Time.local(2009,3,29,0,0,0) + 1.day, Time.local(2009,3,30,0,0,0)
end
end
protected
def with_env_tz(new_tz = 'US/Eastern')
old_tz, ENV['TZ'] = ENV['TZ'], new_tz

32
activesupport/test/core_ext/time_ext_test.rb
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@ -183,26 +183,26 @@ def test_ago
def test_daylight_savings_time_crossings_backward_start
with_env_tz 'US/Eastern' do
# dt: US: 2005 April 3rd 4:18am
assert_equal Time.local(2005,4,2,4,18,0), Time.local(2005,4,3,4,18,0).ago(86400), 'dt-1.day=>st'
assert_equal Time.local(2005,4,1,4,18,0), Time.local(2005,4,2,4,18,0).ago(86400), 'st-1.day=>st'
assert_equal Time.local(2005,4,2,3,18,0), Time.local(2005,4,3,4,18,0).ago(24.hours), 'dt-1.day=>st'
assert_equal Time.local(2005,4,1,4,18,0), Time.local(2005,4,2,4,18,0).ago(24.hours), 'st-1.day=>st'
end
with_env_tz 'NZ' do
# dt: New Zealand: 2006 October 1st 4:18am
assert_equal Time.local(2006,9,30,4,18,0), Time.local(2006,10,1,4,18,0).ago(86400), 'dt-1.day=>st'
assert_equal Time.local(2006,9,29,4,18,0), Time.local(2006,9,30,4,18,0).ago(86400), 'st-1.day=>st'
assert_equal Time.local(2006,9,30,3,18,0), Time.local(2006,10,1,4,18,0).ago(24.hours), 'dt-1.day=>st'
assert_equal Time.local(2006,9,29,4,18,0), Time.local(2006,9,30,4,18,0).ago(24.hours), 'st-1.day=>st'
end
end
def test_daylight_savings_time_crossings_backward_end
with_env_tz 'US/Eastern' do
# st: US: 2005 October 30th 4:03am
assert_equal Time.local(2005,10,29,4,3), Time.local(2005,10,30,4,3,0).ago(86400), 'st-1.day=>dt'
assert_equal Time.local(2005,10,28,4,3), Time.local(2005,10,29,4,3,0).ago(86400), 'dt-1.day=>dt'
assert_equal Time.local(2005,10,29,5,3), Time.local(2005,10,30,4,3,0).ago(24.hours), 'st-1.day=>dt'
assert_equal Time.local(2005,10,28,4,3), Time.local(2005,10,29,4,3,0).ago(24.hours), 'dt-1.day=>dt'
end
with_env_tz 'NZ' do
# st: New Zealand: 2006 March 19th 4:03am
assert_equal Time.local(2006,3,18,4,3), Time.local(2006,3,19,4,3,0).ago(86400), 'st-1.day=>dt'
assert_equal Time.local(2006,3,17,4,3), Time.local(2006,3,18,4,3,0).ago(86400), 'dt-1.day=>dt'
assert_equal Time.local(2006,3,18,5,3), Time.local(2006,3,19,4,3,0).ago(24.hours), 'st-1.day=>dt'
assert_equal Time.local(2006,3,17,4,3), Time.local(2006,3,18,4,3,0).ago(24.hours), 'dt-1.day=>dt'
end
end
@ -243,13 +243,13 @@ def test_since
def test_daylight_savings_time_crossings_forward_start
with_env_tz 'US/Eastern' do
# st: US: 2005 April 2nd 7:27pm
assert_equal Time.local(2005,4,3,19,27,0), Time.local(2005,4,2,19,27,0).since(86400), 'st+1.day=>dt'
assert_equal Time.local(2005,4,4,19,27,0), Time.local(2005,4,3,19,27,0).since(86400), 'dt+1.day=>dt'
assert_equal Time.local(2005,4,3,20,27,0), Time.local(2005,4,2,19,27,0).since(24.hours), 'st+1.day=>dt'
assert_equal Time.local(2005,4,4,19,27,0), Time.local(2005,4,3,19,27,0).since(24.hours), 'dt+1.day=>dt'
end
with_env_tz 'NZ' do
# st: New Zealand: 2006 September 30th 7:27pm
assert_equal Time.local(2006,10,1,19,27,0), Time.local(2006,9,30,19,27,0).since(86400), 'st+1.day=>dt'
assert_equal Time.local(2006,10,2,19,27,0), Time.local(2006,10,1,19,27,0).since(86400), 'dt+1.day=>dt'
assert_equal Time.local(2006,10,1,20,27,0), Time.local(2006,9,30,19,27,0).since(24.hours), 'st+1.day=>dt'
assert_equal Time.local(2006,10,2,19,27,0), Time.local(2006,10,1,19,27,0).since(24.hours), 'dt+1.day=>dt'
end
end
@ -295,13 +295,13 @@ def test_daylight_savings_time_crossings_backward_start_yesterday
def test_daylight_savings_time_crossings_forward_end
with_env_tz 'US/Eastern' do
# dt: US: 2005 October 30th 12:45am
assert_equal Time.local(2005,10,31,0,45,0), Time.local(2005,10,30,0,45,0).since(86400), 'dt+1.day=>st'
assert_equal Time.local(2005,11, 1,0,45,0), Time.local(2005,10,31,0,45,0).since(86400), 'st+1.day=>st'
assert_equal Time.local(2005,10,30,23,45,0), Time.local(2005,10,30,0,45,0).since(24.hours), 'dt+1.day=>st'
assert_equal Time.local(2005,11, 1,0,45,0), Time.local(2005,10,31,0,45,0).since(24.hours), 'st+1.day=>st'
end
with_env_tz 'NZ' do
# dt: New Zealand: 2006 March 19th 1:45am
assert_equal Time.local(2006,3,20,1,45,0), Time.local(2006,3,19,1,45,0).since(86400), 'dt+1.day=>st'
assert_equal Time.local(2006,3,21,1,45,0), Time.local(2006,3,20,1,45,0).since(86400), 'st+1.day=>st'
assert_equal Time.local(2006,3,20,0,45,0), Time.local(2006,3,19,1,45,0).since(24.hours), 'dt+1.day=>st'
assert_equal Time.local(2006,3,21,1,45,0), Time.local(2006,3,20,1,45,0).since(24.hours), 'st+1.day=>st'
end
end