Merge pull request #1452 from Futurelearn/faster-view-specs

Halve the time it takes to run view specs by enabling the resolver cache

Author: soulcutter

lib/rspec/rails/example/view_example_group.rb

@@ -114,7 +114,7 @@ def _default_render_options
 
             render_options = { :template => template }
             render_options[:handlers] = [handler] if handler
-            render_options[:formats] = [format] if format
+            render_options[:formats] = [format.to_sym] if format
             render_options[:locales] = [locale] if locale
 
             render_options
@@ -155,9 +155,6 @@ def _include_controller_helpers
             view.lookup_context.prefixes << _controller_path
           end
 
-          # fixes bug with differing formats
-          view.lookup_context.view_paths.each(&:clear_cache)
-
           controller.controller_path = _controller_path
           controller.request.path_parameters[:controller] = _controller_path
           controller.request.path_parameters[:action]     = _inferred_action unless _inferred_action =~ /^_/

spec/rspec/rails/example/view_example_group_spec.rb

@@ -121,7 +121,7 @@ def _assigns
           view_spec.render
 
           if ::Rails::VERSION::STRING >= '3.2'
-            expect(view_spec.received.first).to eq([{:template => "widgets/new", :locales=>['en'], :formats=>['html'], :handlers=>['erb']}, {}, nil])
+            expect(view_spec.received.first).to eq([{:template => "widgets/new", :locales=>['en'], :formats=>[:html], :handlers=>['erb']}, {}, nil])
           else
             expect(view_spec.received.first).to eq([{:template => "widgets/new.en.html.erb"}, {}, nil])
           end