lib/rubocop/cop/rspec/instance_variable.rb in rubocop-rspec-1.21.0 vs lib/rubocop/cop/rspec/instance_variable.rb in rubocop-rspec-1.22.0

@@ -51,24 +51,33 @@
 
         EXAMPLE_GROUP_METHODS = ExampleGroups::ALL + SharedGroups::ALL
 
         def_node_matcher :spec_group?, EXAMPLE_GROUP_METHODS.block_pattern
 
+        def_node_matcher :dynamic_class?, <<-PATTERN
+          (block (send (const nil? :Class) :new ...) ...)
+        PATTERN
+
         def_node_search :ivar_usage, '$(ivar $_)'
 
         def_node_search :ivar_assigned?, '(ivasgn % ...)'
 
         def on_block(node)
           return unless spec_group?(node)
 
           ivar_usage(node) do |ivar, name|
+            return if inside_dynamic_class?(ivar)
             return if assignment_only? && !ivar_assigned?(node, name)
 
             add_offense(ivar, location: :expression)
           end
         end
 
         private
+
+        def inside_dynamic_class?(node)
+          node.each_ancestor(:block).any? { |block| dynamic_class?(block) }
+        end
 
         def assignment_only?
           cop_config['AssignmentOnly']
         end
       end