Isolating Class Changes

base_spec-fragment.rb

    context "with an isolated decorator class" do
      let(:decorator_class) { Class.new(Decorator) }
      subject{ decorator_class.new(source) }

      context "when #hello_world is called again" do
        it "proxies method directly after first hit" do
          subject.methods.should_not include(:hello_world)
          subject.hello_world
          subject.methods.should include(:hello_world)
        end
      end

      context "when #hello_world is called for the first time" do
        it "hits method missing" do
          subject.should_receive(:method_missing)
          subject.hello_world
        end
      end
    end