recognizes when a partial was rendered twice. Closes #3675

2 files changed, 18 insertions, 9 deletions

diff --git a/actionpack/lib/action_controller/test_case.rb b/actionpack/lib/action_controller/test_case.rb
index ace5a2c822..6aa43edf47 100644
--- a/actionpack/lib/action_controller/test_case.rb
+++ b/actionpack/lib/action_controller/test_case.rb
@@ -123,11 +123,17 @@ module ActionController
 
         if expected_partial = options[:partial]
           if expected_locals = options[:locals]
-            if defined?(@locals)
-              actual_locals = @locals[expected_partial.to_s.sub(/^_/,'')]
-              expected_locals.each_pair do |k,v|
-                assert_equal(v, actual_locals[k])
+            if defined?(@_locals)
+              actual_locals_collection = @_locals[expected_partial.to_s.sub(/^_/,'')]
+              result = actual_locals_collection.any? do |actual_locals|
+                expected_locals.each_pair.all? do |k,v|
+                  v == actual_locals[k]
+                end
               end
+              msg = 'expecting %s to be rendered with %s but was with %s' % [expected_partial,
+                                                                             expected_locals,
+                                                                             actual_locals_collection]
+              assert(result, msg)
             else
               warn "the :locals option to #assert_template is only supported in a ActionView::TestCase"
             end
diff --git a/actionpack/lib/action_view/test_case.rb b/actionpack/lib/action_view/test_case.rb
index 5434b3421e..6e5a3a63ca 100644
--- a/actionpack/lib/action_view/test_case.rb
+++ b/actionpack/lib/action_view/test_case.rb
@@ -120,7 +120,7 @@ module ActionView
       end
 
       def locals
-        @locals ||= {}
+        @_locals ||= {}
       end
 
       included do
@@ -162,12 +162,15 @@ module ActionView
           case options
           when Hash
             if block_given?
-              locals[options[:layout]] = options[:locals]
+              locals[options[:layout]] ||= []
+              locals[options[:layout]] << options[:locals]
             elsif options.key?(:partial)
-              locals[options[:partial]] = options[:locals]
+              locals[options[:partial]] ||= []
+              locals[options[:partial]] << options[:locals]
             end
           else
-            locals[options] = local_assigns
+            locals[options] ||= []
+            locals[options] << local_assigns
           end
 
           super
@@ -197,7 +200,7 @@ module ActionView
         :@_routes,
         :@controller,
         :@_layouts,
-        :@locals,
+        :@_locals,
         :@method_name,
         :@output_buffer,
         :@_partials,