Use directly TZInfo::Timezone without proxy

Since real timezone is loaded anyway in `#utc_offset`
which is called during `#create`

2 files changed, 6 insertions, 11 deletions

diff --git a/activesupport/lib/active_support/values/time_zone.rb b/activesupport/lib/active_support/values/time_zone.rb
index fd05a5459c..17629eabb3 100644
--- a/activesupport/lib/active_support/values/time_zone.rb
+++ b/activesupport/lib/active_support/values/time_zone.rb
@@ -202,7 +202,7 @@ module ActiveSupport
       end
 
       def find_tzinfo(name)
-        TZInfo::TimezoneProxy.new(MAPPING[name] || name)
+        TZInfo::Timezone.new(MAPPING[name] || name)
       end
 
       alias_method :create, :new
@@ -237,7 +237,7 @@ module ActiveSupport
         case arg
           when String
           begin
-            @lazy_zones_map[arg] ||= create(arg).tap(&:utc_offset)
+            @lazy_zones_map[arg] ||= create(arg)
           rescue TZInfo::InvalidTimezoneIdentifier
             nil
           end
diff --git a/activesupport/test/time_zone_test.rb b/activesupport/test/time_zone_test.rb
index 3e6d9652bb..cd7e184cda 100644
--- a/activesupport/test/time_zone_test.rb
+++ b/activesupport/test/time_zone_test.rb
@@ -395,15 +395,10 @@ class TimeZoneTest < ActiveSupport::TestCase
     assert_raise(ArgumentError) { ActiveSupport::TimeZone[false] }
   end
 
-  def test_unknown_zone_should_have_tzinfo_but_exception_on_utc_offset
-    zone = ActiveSupport::TimeZone.create("bogus")
-    assert_instance_of TZInfo::TimezoneProxy, zone.tzinfo
-    assert_raise(TZInfo::InvalidTimezoneIdentifier) { zone.utc_offset }
-  end
-
-  def test_unknown_zone_with_utc_offset
-    zone = ActiveSupport::TimeZone.create("bogus", -21_600)
-    assert_equal(-21_600, zone.utc_offset)
+  def test_unknown_zone_raises_exception
+    assert_raise TZInfo::InvalidTimezoneIdentifier do
+      ActiveSupport::TimeZone.create("bogus")
+    end
   end
 
   def test_unknown_zones_dont_store_mapping_keys