fix OrderedHash#each* methods to return Enumerators when called without a...

fix OrderedHash#each* methods to return Enumerators when called without a block [#6366 state:resolved]
Signed-off-by: NSantiago Pastorino <santiago@wyeworks.com>

activesupport/lib/active_support/ordered_hash.rb

@@ -137,16 +137,19 @@ def to_a
       end
 
       def each_key
+        return to_enum(:each_key) unless block_given?
         @keys.each { |key| yield key }
         self
       end
 
       def each_value
+        return to_enum(:each_value) unless block_given?
         @keys.each { |key| yield self[key]}
         self
       end
 
       def each
+        return to_enum(:each) unless block_given?
         @keys.each {|key| yield [key, self[key]]}
         self
       end

activesupport/test/ordered_hash_test.rb

@@ -80,18 +80,24 @@ def test_each_key
     keys = []
     assert_equal @ordered_hash, @ordered_hash.each_key { |k| keys << k }
     assert_equal @keys, keys
+    expected_class = RUBY_VERSION < '1.9.1' ? Enumerable::Enumerator : Enumerator
+    assert_kind_of expected_class, @ordered_hash.each_key
   end
 
   def test_each_value
     values = []
     assert_equal @ordered_hash, @ordered_hash.each_value { |v| values << v }
     assert_equal @values, values
+    expected_class = RUBY_VERSION < '1.9.1' ? Enumerable::Enumerator : Enumerator
+    assert_kind_of expected_class, @ordered_hash.each_value
   end
 
   def test_each
     values = []
     assert_equal @ordered_hash, @ordered_hash.each {|key, value| values << value}
     assert_equal @values, values
+    expected_class = RUBY_VERSION < '1.9.1' ? Enumerable::Enumerator : Enumerator
+    assert_kind_of expected_class, @ordered_hash.each
   end
 
   def test_each_with_index