partials inside directory work with `assert_template`

previously when a partial was placed inside a directory
(eg. '/dir/_partial'), `assert_template` did not replace
the '_' prefix when looking through rendered tempaltes,
which resulted in an error.

I modified it to replace both, the leading '_' and the last '_'
after a '/'.

1 files changed, 1 insertions, 1 deletions

diff --git a/actionpack/lib/action_view/test_case.rb b/actionpack/lib/action_view/test_case.rb
index 1f89e51c66..463f192d0c 100644
--- a/actionpack/lib/action_view/test_case.rb
+++ b/actionpack/lib/action_view/test_case.rb
@@ -122,7 +122,7 @@ module ActionView
 
       class RenderedViewsCollection
         def initialize
-          @rendered_views ||= {}
+          @rendered_views ||= Hash.new { |hash, key| hash[key] = [] }
         end
 
         def add(view, locals)