require "spec_helper"

describe Recommendations::Item do
  subject {Recommendations::Item.new("1", violent: 100, romantic: 25)}

  describe "#initialize" do
    its(:id)         {should == "1"}
    its(:categories) {should == {violent: 100, romantic: 25}}
  end

  describe "#similars" do
    context "when count was not specified" do
      let(:count) {Recommendations.configuration.similar_items_count - 1}

      it "gets sorted set range from similar count configuration" do
        Recommendations.redis.should_receive(:zrange)
                             .with("recommendations:similars:item:1", 0, count)
                             .and_return ["2", "3", "4"]
        subject.similars.should == ["2", "3", "4"]
      end
    end

    context "when count was specified" do
      it "gets sorted set range until count" do
        Recommendations.redis.should_receive(:zrange)
                             .with("recommendations:similars:item:1", 0, 9)
                             .and_return ["2", "3", "4"]
        subject.similars(10).should == ["2", "3", "4"]
      end
    end
  end
end