test failing

medias_controller_spec.rb

    before(:each) do
      @user = Factory(:user)
      @media = Factory(:media)
      @place = Factory(:hotel)
      controller.stub!(:current_user).and_return(@user)
    end

    it "saves the newly uploaded image" do
      # Force the media width and height to be nil
      @media.width = nil
      @media.height = nil
      @media.save

      post :save, item_type: @place.class.name, item_id: @place.id, media: { id: @media.id }
      response.should be_success
    end