Add mutation from #[] to #at #fetch

Changelog.md

@@ -1,3 +1,7 @@
+# v0.8.1 2015-xx-xx
+
+* Add mutation from #[] to #at / #fetch
+
 # v0.8.0 2015-06-15
 
 * Drop support for ruby < 2.1

lib/mutant/mutator/node/send.rb

@@ -24,6 +24,8 @@ module Mutant
           to_s:          %i[to_str],
           to_i:          %i[to_int],
           to_a:          %i[to_ary],
+          at:            %i[fetch],
+          :[] =>         %i[at fetch],
           :== =>         %i[eql? equal?],
           :>= =>         %i[> == eql? equal?],
           :<= =>         %i[< == eql? equal?],

meta/send.rb

@@ -367,6 +367,8 @@ Mutant::Meta::Example.add do
   mutation '1'
   mutation 'foo'
   mutation 'foo[]'
+  mutation 'foo.at(1)'
+  mutation 'foo.fetch(1)'
   mutation 'self[1]'
   mutation 'foo[0]'
   mutation 'foo[2]'
@@ -380,6 +382,8 @@ Mutant::Meta::Example.add do
 
   singleton_mutations
   mutation 'self.foo'
+  mutation 'self.foo.at()'
+  mutation 'self.foo.fetch()'
   mutation 'self[]'
   mutation 'foo[]'
 end
@@ -391,6 +395,8 @@ Mutant::Meta::Example.add do
   mutation 'self[self]'
   mutation 'self[nil]'
   mutation 'self[]'
+  mutation 'self.at(foo)'
+  mutation 'self.fetch(foo)'
   mutation 'foo'
 end
 
@@ -400,6 +406,8 @@ Mutant::Meta::Example.add do
   singleton_mutations
   mutation 'foo'
   mutation 'foo[]'
+  mutation 'foo.at(*bar)'
+  mutation 'foo.fetch(*bar)'
   mutation 'foo[nil]'
   mutation 'foo[self]'
   mutation 'foo[bar]'