Ruby 1.9 compat: TimeZone avoids localtime conversion. References #1689…

… [Chu Yeow]

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@8369 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

activesupport/lib/active_support/values/time_zone.rb

@@ -45,16 +45,17 @@ def today
 
   # Adjust the given time to the time zone represented by +self+.
   def adjust(time)
-    time = time.to_time
+    time = time.to_time unless time.is_a?(::Time)
     time + utc_offset - time.utc_offset
   end
 
   # Reinterprets the given time value as a time in the current time
   # zone, and then adjusts it to return the corresponding time in the
   # local time zone.
   def unadjust(time)
-    time = Time.local(*time.to_time.to_a)
-    time - utc_offset + time.utc_offset
+    time = time.to_time unless time.is_a?(::Time)
+    time = time.localtime
+    time - utc_offset - time.utc_offset
   end
 
   # Compare this time zone to the parameter. The two are comapred first on

activesupport/test/time_zone_test.rb

@@ -34,7 +34,7 @@ def test_today
   end
 
   def test_adjust_negative
-    zone = TimeZone.create( "Test", -4200 )
+    zone = TimeZone.create( "Test", -4200 ) # 4200s == 70 mins
     assert_equal Time.utc(2004,7,24,23,55,0), zone.adjust(Time.utc(2004,7,25,1,5,0))
   end