Fix assert_select for XML documents. Closes #8173. [dasil003]

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@7417 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

actionpack/lib/action_controller/test_process.rb

@@ -449,7 +449,8 @@ def build_request_uri(action, parameters)
     end
 
     def html_document
-      @html_document ||= HTML::Document.new(@response.body)
+      xml = @response.content_type =~ /xml$/
+      @html_document ||= HTML::Document.new(@response.body, false, xml)
     end
 
     def find_tag(conditions)

actionpack/test/controller/test_test.rb

@@ -45,6 +45,16 @@ def test_html_output
 </html>
 HTML
     end
+    
+    def test_xml_output
+      response.content_type = "application/xml"
+      render :text => <<XML
+<?xml version="1.0" encoding="UTF-8"?>
+<root>
+  <area>area is an empty tag in HTML, raising an error if not in xml mode</area>
+</root>
+XML
+    end
 
     def test_only_one_param
       render :text => (params[:left] && params[:right]) ? "EEP, Both here!" : "OK"
@@ -301,6 +311,20 @@ def test_assert_tag_children_without_content
           :children => { :count => 1,
             :only => { :tag => "img" } } } }
   end
+  
+  def test_should_not_impose_childless_html_tags_in_xml
+    process :test_xml_output
+
+    begin
+      $stderr = StringIO.new
+      assert_select 'area' #This will cause a warning if content is processed as HTML
+      $stderr.rewind && err = $stderr.read
+    ensure
+      $stderr = STDERR
+    end
+
+    assert err.empty?
+  end
 
   def test_assert_tag_attribute_matching
     @response.body = '<input type="text" name="my_name">'