spec/unit/axiom/optimizer/optimize_spec.rb in axiom-optimizer-0.1.0 vs spec/unit/axiom/optimizer/optimize_spec.rb in axiom-optimizer-0.1.1

@@ -4,14 +4,14 @@
 
 describe Optimizer, '#optimize' do
   subject { object.optimize }
 
   let(:described_class) { Class.new(Optimizer)           }
-  let(:operation)       { mock('Operation')              }
+  let(:operation)       { double('Operation')            }
   let(:object)          { described_class.new(operation) }
 
   before do
-    described_class.stub!(:to_s).and_return('Optimizer')
+    described_class.stub(:to_s).and_return('Optimizer')
   end
 
   specify { expect { subject }.to raise_error(NotImplementedError, 'Optimizer#optimize must be implemented') }
 end