Use subclasses method instead of class variable.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@8977 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/models/enumeration.rb

@@ -98,7 +98,7 @@ class Enumeration < ActiveRecord::Base
   #
   # Note: subclasses is protected in ActiveRecord
   def self.get_subclasses
-    @@subclasses[Enumeration]
+    subclasses
   end
 
   # Does the +new+ Hash override the previous Enumeration?

test/unit/enumeration_test.rb

@@ -108,4 +108,15 @@ class EnumerationTest < ActiveSupport::TestCase
     enumeration.parent = Enumeration.find(5)
     assert enumeration.is_override?
   end
+
+  def test_get_subclasses
+    classes = Enumeration.get_subclasses
+    assert_include IssuePriority, classes
+    assert_include DocumentCategory, classes
+    assert_include TimeEntryActivity, classes
+
+    classes.each do |klass|
+      assert_equal Enumeration, klass.superclass
+    end
+  end
 end