Add cbase mutator

lib/mutant.rb

@@ -57,6 +57,7 @@ require 'mutant/mutator/node/literal/nil'
 require 'mutant/mutator/node/argument'
 require 'mutant/mutator/node/arguments'
 require 'mutant/mutator/node/begin'
+require 'mutant/mutator/node/cbase'
 require 'mutant/mutator/node/const'
 require 'mutant/mutator/node/named_value/access'
 require 'mutant/mutator/node/named_value/constant_assignment'

lib/mutant/mutator/node/cbase.rb

@@ -0,0 +1,25 @@
+module Mutant
+  class Mutator
+    class Node
+
+      # Mutation emitter to handle cbase nodes
+      class Cbase < self
+
+        handle(:cbase)
+
+      private
+
+        # Emit mutations
+        #
+        # @return [undefined]
+        #
+        # @api private
+        #
+        def dispatch
+          # noop, for now
+        end
+
+      end # Cbase
+    end # Node
+  end # Mutator
+end # Mutant

lib/mutant/mutator/node/generic.rb

@@ -13,7 +13,7 @@ module Mutant
           :dstr, :dsym, :yield, :rescue, :redo, :defined?,
           :blockarg, :block_pass, :op_asgn, :and_asgn,
           :regopt, :restarg, :resbody, :retry, :arg_expr,
-          :kwrestarg, :kwoptarg, :kwarg, :undef, :module, :cbase, :empty,
+          :kwrestarg, :kwoptarg, :kwarg, :undef, :module, :empty,
           :alias, :for, :xstr, :back_ref, :nth_ref, :class,
           :sclass, :match_with_lvasgn, :match_current_line, :or_asgn, :kwbegin
         )

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

@@ -0,0 +1,17 @@
+require 'spec_helper'
+
+describe Mutant::Mutator::Node::NamedValue::Access, 'cbase' do
+
+  before do
+    Mutant::Random.stub(:hex_string => :random)
+  end
+
+  let(:source) { '::A' }
+
+  let(:mutations) do
+    mutants = []
+    mutants << 'nil'
+  end
+
+  it_should_behave_like 'a mutator'
+end