Object#duplicable?

1. Improve tests
2. Remove unnecessary constant
3. Add docs for BigDecimal#duplicable?

1 files changed, 9 insertions, 16 deletions

diff --git a/activesupport/test/core_ext/object/duplicable_test.rb b/activesupport/test/core_ext/object/duplicable_test.rb
index e0566e012c..84512380cf 100644
--- a/activesupport/test/core_ext/object/duplicable_test.rb
+++ b/activesupport/test/core_ext/object/duplicable_test.rb
@@ -5,34 +5,27 @@ require 'active_support/core_ext/numeric/time'
 
 class DuplicableTest < ActiveSupport::TestCase
   RAISE_DUP  = [nil, false, true, :symbol, 1, 2.3, 5.seconds]
-  YES = ['1', Object.new, /foo/, [], {}, Time.now, Class.new, Module.new]
-  NO = []
+  ALLOW_DUP = ['1', Object.new, /foo/, [], {}, Time.now, Class.new, Module.new]
 
+  # Needed to support Ruby 1.9.x, as it doesn't allow dup on BigDecimal, instead
+  # raises TypeError exception. Checking here on the runtime whether BigDecimal
+  # will allow dup or not.
   begin
     bd = BigDecimal.new('4.56')
-    YES << bd.dup
+    ALLOW_DUP << bd.dup
   rescue TypeError
     RAISE_DUP << bd
   end
 
-
   def test_duplicable
-    (RAISE_DUP + NO).each do |v|
+    RAISE_DUP.each do |v|
       assert !v.duplicable?
+      assert_raises(TypeError, v.class.name) { v.dup }
     end
 
-    YES.each do |v|
-      assert v.duplicable?, "#{v.class} should be duplicable"
-    end
-
-    (YES + NO).each do |v|
+    ALLOW_DUP.each do |v|
+      assert v.duplicable?, "#{ v.class } should be duplicable"
       assert_nothing_raised { v.dup }
     end
-
-    RAISE_DUP.each do |v|
-      assert_raises(TypeError, v.class.name) do
-        v.dup
-      end
-    end
   end
 end