Hash#to_xml doesn't double-unescape. Closes #8806.

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@7505 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

activesupport/CHANGELOG

 *SVN*
 
+* Hash#to_xml doesn't double-unescape.  #8806 [Ezran]
+
 * Added Array#rand #9170 [norbert]. Examples:
 
     [].rand       # => nil

activesupport/lib/active_support/core_ext/hash/conversions.rb

@@ -169,7 +169,7 @@ def typecast_xml_value(value)
               case value.class.to_s
                 when 'Hash'
                   if value.has_key?("__content__")
-                    content = translate_xml_entities(value["__content__"])
+                    content = value["__content__"]
                     if parser = XML_PARSING[value["type"]]
                       if parser.arity == 2
                         XML_PARSING[value["type"]].call(content, value)
@@ -226,14 +226,6 @@ def typecast_xml_value(value)
               end
             end
 
-            def translate_xml_entities(value)
-              value.gsub(/&lt;/,   "<").
-                    gsub(/&gt;/,   ">").
-                    gsub(/&quot;/, '"').
-                    gsub(/&apos;/, "'").
-                    gsub(/&amp;/,  "&")
-            end
-
             def undasherize_keys(params)
               case params.class.to_s
                 when "Hash"

activesupport/test/core_ext/hash_ext_test.rb

@@ -643,6 +643,34 @@ def test_empty_string_works_for_typecast_xml_value
       Hash.send(:typecast_xml_value, "")
     end
   end
+  
+  def test_escaping_to_xml
+    hash = { 
+      :bare_string        => 'First & Last Name', 
+      :pre_escaped_string => 'First & Last Name'
+    }.stringify_keys
+    
+    expected_xml = '<person><bare-string>First &amp; Last Name</bare-string><pre-escaped-string>First &amp;amp; Last Name</pre-escaped-string></person>'
+    assert_equal expected_xml, hash.to_xml(@xml_options)
+  end
+  
+  def test_unescaping_from_xml
+    xml_string = '<person><bare-string>First &amp; Last Name</bare-string><pre-escaped-string>First &amp;amp; Last Name</pre-escaped-string></person>'
+    expected_hash = { 
+      :bare_string        => 'First & Last Name', 
+      :pre_escaped_string => 'First &amp; Last Name'
+    }.stringify_keys
+    assert_equal expected_hash, Hash.from_xml(xml_string)['person']
+  end
+  
+  def test_roundtrip_to_xml_from_xml
+    hash = { 
+      :bare_string        => 'First & Last Name', 
+      :pre_escaped_string => 'First &amp; Last Name'
+    }.stringify_keys
+
+    assert_equal hash, Hash.from_xml(hash.to_xml(@xml_options))['person']
+  end
 end
 
 class QueryTest < Test::Unit::TestCase