lib/mutant/matcher/method/singleton.rb in mutant-0.8.10 vs lib/mutant/matcher/method/singleton.rb in mutant-0.8.11

@@ -14,13 +14,14 @@
           super(scope, method_name, Evaluator)
         end
 
         # Singleton method evaluator
         class Evaluator < Evaluator
-          SUBJECT_CLASS  = Subject::Method::Singleton
-          RECEIVER_INDEX = 0
-          NAME_INDEX     = 1
+          SUBJECT_CLASS    = Subject::Method::Singleton
+          RECEIVER_INDEX   = 0
+          NAME_INDEX       = 1
+          RECEIVER_WARNING = 'Can only match :defs on :self or :const got %p unable to match'.freeze
 
         private
 
           # Test for node match
           #
@@ -63,10 +64,10 @@
             when :self
               true
             when :const
               receiver_name?(receiver)
             else
-              env.warn(format('Can only match :defs on :self or :const got %s unable to match', receiver.type.inspect))
+              env.warn(RECEIVER_WARNING % receiver.type)
               nil
             end
           end
 
           # Test if receiver name matches context