Simplified Version of user_presenter_spec.rb from DestroyAllSoftware

user_presenter_spec.rb

class Module
  alias :let :define_method
end

UserPresenter = Struct.new(:user) do
  let(:full_name){ [user.first_name, user.last_name].join(' ') }
end

describe UserPresenter do
  let(:user){ stub(:user, :first_name => 'Bob', :last_name => 'Smith') }

  it "presents user's full name" do
    UserPresenter.new(user).full_name.should == 'Bob Smith'
  end
end