lib/caricature/clr/isolator.rb in casualjim-caricature-0.5.0 vs lib/caricature/clr/isolator.rb in casualjim-caricature-0.6.0

@@ -16,10 +16,11 @@
       unless context.subject.respond_to?(:class_eval)
         sklass = context.subject.class
         instance = context.subject
       end
       @descriptor = ClrClassDescriptor.new sklass
-      build_isolation sklass, (instance || sklass.new)
+      instance ||= sklass.new unless sklass.to_clr_type.is_abstract
+      build_isolation sklass, instance
     end
 
     # initializes the messaging strategy for the isolator
     def initialize_messenger
       @context.messenger = ClrClassMessenger.new @context.expectations, @subject
\ No newline at end of file