Add mutation from #reverse_merge to #merge

[fix #214]

Changelog.md

@@ -4,6 +4,7 @@
 * Add -j, --jobs flag to control concurrency.
 * Fix blind spots on send with block.
 * Add mutation from `foo { bar }` to `bar`
+* Add mutation from `reverse_merge` to `merge`
 * Fix reporting of diff errors to include context [tjchambers]
 
 # v0.5.26 2014-07-07

lib/mutant/mutator/node/send.rb

@@ -11,18 +11,19 @@ module Mutant
         children :receiver, :selector
 
         SELECTOR_REPLACEMENTS = IceNine.deep_freeze(
-          reverse_map:  [:map, :each],
-          kind_of?:     [:instance_of?],
-          is_a?:        [:instance_of?],
-          reverse_each: [:each],
-          map:          [:each],
-          send:         [:public_send],
-          gsub:         [:sub],
-          eql?:         [:equal?],
-          to_s:         [:to_str],
-          to_i:         [:to_int],
-          to_a:         [:to_ary],
-          :== =>        [:eql?, :equal?]
+          reverse_map:   [:map, :each],
+          kind_of?:      [:instance_of?],
+          is_a?:         [:instance_of?],
+          reverse_each:  [:each],
+          reverse_merge: [:merge],
+          map:           [:each],
+          send:          [:public_send],
+          gsub:          [:sub],
+          eql?:          [:equal?],
+          to_s:          [:to_str],
+          to_i:          [:to_int],
+          to_a:          [:to_ary],
+          :== =>         [:eql?, :equal?]
         )
 
       private

meta/send.rb

@@ -7,6 +7,13 @@ Mutant::Meta::Example.add do
   mutation 'each'
 end
 
+Mutant::Meta::Example.add do
+  source 'reverse_merge'
+
+  singleton_mutations
+  mutation 'merge'
+end
+
 Mutant::Meta::Example.add do
   source 'reverse_map'