Change connective mutator to mutate the operand boolean context

config/flay.yml

@@ -1,3 +1,3 @@
 ---
 threshold: 16
-total_score: 743
+total_score: 737

lib/mutant/mutator/node/connective/binary.rb

@@ -28,7 +28,7 @@ module Mutant
             emit(left)
             emit(right)
             mutate_operator
-            mutate_conditions
+            mutate_operands
           end
 
           # Emit operator mutations
@@ -47,11 +47,9 @@ module Mutant
           #
           # @api private
           #
-          def mutate_conditions
+          def mutate_operands
-            [N_TRUE, N_FALSE, N_NIL].each do |condition|
+            emit(s(node.type, s(:not, left), right))
-              emit_left(condition)  unless left == condition
+            emit(s(node.type, left, s(:not, right)))
-              emit_right(condition) unless right == condition
-            end
           end
 
         end # Binary

spec/unit/mutant/mutator/node/connective/binary/mutation_spec.rb

@@ -12,11 +12,8 @@ describe Mutant::Mutator::Node::Connective::Binary, 'mutations' do
 
       mutations << 'true or false'
 
-      mutations << 'false and false'
+      mutations << 'not true and false'
-      mutations << 'true and true'
+      mutations << 'true and not false'
-
-      mutations << 'nil and false'
-      mutations << 'true and nil'
     end
 
     it_should_behave_like 'a mutator'
@@ -33,11 +30,8 @@ describe Mutant::Mutator::Node::Connective::Binary, 'mutations' do
 
       mutations << 'true and false'
 
-      mutations << 'false or false'
+      mutations << 'not true or false'
-      mutations << 'true or true'
+      mutations << 'true or not false'
-
-      mutations << 'nil or false'
-      mutations << 'true or nil'
     end
 
     it_should_behave_like 'a mutator'