Do not put partial name to local_assigns when rendering without an object

When one rendered a partial template without specifying an object
or a collection (e.g. <%= render partial: 'partial_name' %>), Rails
would make an object called :partial_name available in local_assigns.
I don't think this was the intended behavior, since no local variable
called 'partial_name' gets defined in the view.

1 files changed, 8 insertions, 0 deletions

diff --git a/actionview/test/template/render_test.rb b/actionview/test/template/render_test.rb
index 22665b6844..27bbb9b6c1 100644
--- a/actionview/test/template/render_test.rb
+++ b/actionview/test/template/render_test.rb
@@ -277,6 +277,14 @@ module RenderTestCases
     assert_nil @view.render(:partial => "test/customer", :collection => nil)
   end
 
+  def test_render_partial_without_object_does_not_put_partial_name_to_local_assigns
+    assert_equal 'false', @view.render(partial: 'test/partial_name_in_local_assigns')
+  end
+
+  def test_render_partial_with_nil_object_puts_partial_name_to_local_assigns
+    assert_equal 'true', @view.render(partial: 'test/partial_name_in_local_assigns', object: nil)
+  end
+
   def test_render_partial_with_nil_values_in_collection
     assert_equal "Hello: davidHello: Anonymous", @view.render(:partial => "test/customer", :collection => [ Customer.new("david"), nil ])
   end