Merge pull request #2754 from javierjulio/patch-3

Fix uninitialized constant RSpec::Rails::OpenStruct error

Author: pirj

spec/rspec/rails/example/view_example_group_spec.rb

@@ -1,3 +1,4 @@
+require 'ostruct'
 require 'support/group_failure_formatter'
 
 module RSpec::Rails
@@ -187,7 +188,7 @@ def _default_file_to_render; end # Stub method
         Class.new do
           include ViewExampleGroup::ExampleMethods
           def controller
-            @controller ||= OpenStruct.new(params: nil)
+            @controller ||= ::OpenStruct.new(params: nil)
           end
         end.new
       end