spec/unit/mutant/mutator/node/defined_predicate/mutation_spec.rb in mutant-0.3.0.rc1 vs spec/unit/mutant/mutator/node/defined_predicate/mutation_spec.rb in mutant-0.3.0.rc2

@@ -1,10 +1,14 @@
 # encoding: utf-8
 
 require 'spec_helper'
 
 describe Mutant::Mutator::Node::Generic, 'defined?' do
-  let(:source)    { 'defined?(foo)' }
-  let(:mutations) { []              }
+  let(:source) { 'defined?(foo)' }
+
+  let(:mutations) do
+    mutations = []
+    mutations << 'defined?(nil)'
+  end
 
   it_should_behave_like 'a mutator'
 end