Merge pull request #3772 from lest/label-with-block

fix label with block in erb

actionpack/lib/action_view/helpers/form_helper.rb

@@ -960,7 +960,7 @@ def instantiate_builder(record_name, record_object, options, &block)
     end
 
     class InstanceTag
-      include Helpers::CaptureHelper, Context, Helpers::TagHelper, Helpers::FormTagHelper
+      include Helpers::TagHelper, Helpers::FormTagHelper
 
       attr_reader :object, :method_name, :object_name
 
@@ -992,7 +992,7 @@ def to_label_tag(text = nil, options = {}, &block)
         options["for"] ||= name_and_id["id"]
 
         if block_given?
-          label_tag(name_and_id["id"], options, &block)
+          @template_object.label_tag(name_and_id["id"], options, &block)
         else
           content = if text.blank?
             object_name.gsub!(/\[(.*)_attributes\]\[\d\]/, '.\1')

actionpack/test/fixtures/test/_label_with_block.erb

+<%= label 'post', 'message' do %>
+  Message
+  <%= text_field 'post', 'message' %>
+<% end %>

actionpack/test/template/form_helper_test.rb

@@ -230,6 +230,13 @@ def test_label_with_block
     assert_dom_equal('<label for="post_title">The title, please:</label>', label(:post, :title) { "The title, please:" })
   end
 
+  def test_label_with_block_in_erb
+    path = ActionView::FileSystemResolver.new(FIXTURE_LOAD_PATH)
+    view_paths = ActionView::PathSet.new([path])
+    view = ActionView::Base.new(view_paths)
+    assert_equal "<label for=\"post_message\">\n  Message\n  <input id=\"post_message\" name=\"post[message]\" size=\"30\" type=\"text\" />\n</label>", view.render("test/label_with_block")
+  end
+
   def test_text_field
     assert_dom_equal(
       '<input id="post_title" name="post[title]" size="30" type="text" value="Hello World" />', text_field("post", "title")