Fixed to_label_tag to accept id attribute without changing for attribute [#2660 status:resolved]

Signed-off-by: José Valim <jose.valim@gmail.com>

actionpack/lib/action_view/helpers/form_helper.rb

@@ -738,6 +738,7 @@ module ActionView
         options = options.stringify_keys
         tag_value = options.delete("value")
         name_and_id = options.dup
+        name_and_id["id"] = name_and_id["for"]
         add_default_name_and_id_for_value(tag_value, name_and_id)
         options.delete("index")
         options["for"] ||= name_and_id["id"]

actionpack/test/template/form_helper_test.rb

@@ -157,6 +157,22 @@ class FormHelperTest < ActionView::TestCase
     assert_dom_equal('<label for="my_for">Title</label>', label(:post, :title, nil, "for" => "my_for"))
   end
 
+  def test_label_with_id_attribute_as_symbol
+    assert_dom_equal('<label for="post_title" id="my_id">Title</label>', label(:post, :title, nil, :id => "my_id"))
+  end
+
+  def test_label_with_id_attribute_as_string
+    assert_dom_equal('<label for="post_title" id="my_id">Title</label>', label(:post, :title, nil, "id" => "my_id"))
+  end
+
+  def test_label_with_for_and_id_attributes_as_symbol
+    assert_dom_equal('<label for="my_for" id="my_id">Title</label>', label(:post, :title, nil, :for => "my_for", :id => "my_id"))
+  end
+
+  def test_label_with_for_and_id_attributes_as_string
+    assert_dom_equal('<label for="my_for" id="my_id">Title</label>', label(:post, :title, nil, "for" => "my_for", "id" => "my_id"))
+  end
+
   def test_label_for_radio_buttons_with_value
     assert_dom_equal('<label for="post_title_great_title">The title goes here</label>', label("post", "title", "The title goes here", :value => "great_title"))
     assert_dom_equal('<label for="post_title_great_title">The title goes here</label>', label("post", "title", "The title goes here", :value => "great title"))