Ability to pass block to AV#select helper

  Example:

    = select(report, "campaign_ids") do
      - available_campaigns.each do |c|
        %option{:data => {:tags => c.tags.to_json}, :value => c.id}= c.name

1 files changed, 15 insertions, 0 deletions

diff --git a/actionview/test/template/form_options_helper_test.rb b/actionview/test/template/form_options_helper_test.rb
index a6977766d1..801f1607aa 100644
--- a/actionview/test/template/form_options_helper_test.rb
+++ b/actionview/test/template/form_options_helper_test.rb
@@ -556,6 +556,21 @@ class FormOptionsHelperTest < ActionView::TestCase
     )
   end
 
+  def test_select_under_fields_for_with_block
+    @post = Post.new
+
+    output_buffer = fields_for :post, @post do |f|
+      concat(f.select(:category) do
+        concat content_tag(:option, "hello world")
+      end)
+    end
+
+    assert_dom_equal(
+      "<select id=\"post_category\" name=\"post[category]\"><option>hello world</option></select>",
+      output_buffer
+    )
+  end
+
   def test_select_with_multiple_to_add_hidden_input
     output_buffer =  select(:post, :category, "", {}, :multiple => true)
     assert_dom_equal(