Add mutation from csend to send

Changelog.md

@@ -1,3 +1,7 @@
+# v0.8.11 2016-01-xx
+
+* Add support for mutating csend (duck tape operator) into regular sends
+
 # v0.8.10 2016-01-24
 
 * Add support for parser 2.3 (via unparser 0.2.5)

config/flay.yml

@@ -1,3 +1,3 @@
 ---
 threshold: 18
-total_score: 1167
+total_score: 1170

lib/mutant.rb

@@ -113,6 +113,7 @@ require 'mutant/mutator/node/zsuper'
 require 'mutant/mutator/node/restarg'
 require 'mutant/mutator/node/send'
 require 'mutant/mutator/node/send/binary'
+require 'mutant/mutator/node/send/conditional'
 require 'mutant/mutator/node/send/attribute_assignment'
 require 'mutant/mutator/node/send/index'
 require 'mutant/mutator/node/when'

lib/mutant/mutator/node/generic.rb

@@ -8,7 +8,7 @@ module Mutant
         # These nodes still need a dedicated mutator,
         # your contribution is that close!
         handle(
-          :csend, :ensure, :redo, :regopt, :retry, :arg_expr,
+          :ensure, :redo, :regopt, :retry, :arg_expr,
           :kwrestarg, :kwoptarg, :kwarg, :undef, :module, :empty,
           :alias, :for, :xstr, :back_ref, :class,
           :sclass, :match_with_lvasgn, :while_post,

lib/mutant/mutator/node/send/conditional.rb

@@ -0,0 +1,23 @@
+module Mutant
+  class Mutator
+    class Node
+      class Send
+        class Conditional < self
+
+          handle(:csend)
+
+        private
+
+          # Perform dispatch
+          #
+          # @return [undefined]
+          def dispatch
+            super()
+            emit(s(:send, *children))
+          end
+
+        end # Conditional
+      end # Send
+    end # Node
+  end # Mutator
+end # Mutant

meta/csend.rb

@@ -0,0 +1,8 @@
+Mutant::Meta::Example.add do
+  source 'a&.b'
+
+  singleton_mutations
+  mutation 'a.b'
+  mutation 'self&.b'
+  mutation 'a'
+end