Handle masgn outside of generic mutator

May result in syntactially invalid AST.
Currently is a noop.

TODO

@@ -4,6 +4,7 @@ Code:
   * Log all warnings through reporter, so remove random $stderr.puts calls
 
 Mutations:
+  * Add true masgn mutations
   * Add binary operator specific mutations (YAY, finally reached this point)
   * Add some kind of a "do not touch me object" that raises on all messages.
     It can be used to make sure each literal value is touched.

config/flay.yml

@@ -1,3 +1,3 @@
 ---
 threshold: 16
-total_score: 671
+total_score: 674

lib/mutant.rb

@@ -64,6 +64,7 @@ require 'mutant/mutator/node/when'
 require 'mutant/mutator/node/assignment'
 require 'mutant/mutator/node/define'
 require 'mutant/mutator/node/mlhs'
+require 'mutant/mutator/node/masgn'
 require 'mutant/mutator/node/return'
 require 'mutant/mutator/node/block'
 require 'mutant/mutator/node/if'

lib/mutant/mutator/node/generic.rb

@@ -12,7 +12,7 @@ module Mutant
           :next, :break, :match, :gvar, :cvar, :ensure,
           :dstr, :dsym, :yield, :rescue, :redo, :defined?,
           :lvar, :splat, :const, :blockarg, :block_pass, :op_asgn, :regopt,
-          :ivar, :restarg, :casgn, :masgn, :resbody, :retry, :arg_expr,
+          :ivar, :restarg, :casgn, :resbody, :retry, :arg_expr,
           :kwrestarg, :kwoptarg, :kwarg, :undef, :module, :cbase, :empty,
           :alias, :for, :xstr, :back_ref, :nth_ref, :class, :sclass, :match_with_lvasgn,
           :match_current_line, :or_asgn, :kwbegin

lib/mutant/mutator/node/masgn.rb

@@ -0,0 +1,27 @@
+module Mutant
+  class Mutator
+    class Node
+
+      # Mutation emitter to handle multipl assignment nodes
+      class MultipleAssignment < self
+
+        handle(:masgn)
+
+        children :left, :right
+
+      private
+
+        # Perform dispatch
+        #
+        # @return [undefined]
+        #
+        # @api private
+        #
+        def dispatch
+          # noop, for now
+        end
+
+      end # MultipleAssignment
+    end # Node
+  end # Mutator
+end # Mutant

mutant.gemspec

@@ -2,7 +2,7 @@
 
 Gem::Specification.new do |gem|
   gem.name        = 'mutant'
-  gem.version     = '0.3.0.beta11'
+  gem.version     = '0.3.0.beta12'
   gem.authors     = [ 'Markus Schirp' ]
   gem.email       = [ 'mbj@schirp-dso.com' ]
 

spec/unit/mutant/mutator/node/masgn/mutation_spec.rb

@@ -0,0 +1,17 @@
+require 'spec_helper'
+
+describe Mutant::Mutator, 'masgn' do
+
+  before do
+    Mutant::Random.stub(:hex_string => 'random')
+  end
+
+
+  let(:source) { 'a, b = c, d' }
+
+  let(:mutations) do
+    mutants = []
+  end
+
+  it_should_behave_like 'a mutator'
+end