require 'rails_helper'
require_dependency 'topic_retriever'

describe TopicRetriever do

  let(:embed_url) { "http://eviltrout.com/2013/02/10/why-discourse-uses-emberjs.html" }
  let(:author_username) { "eviltrout" }
  let(:topic_retriever) { TopicRetriever.new(embed_url, author_username: author_username) }

  describe "#retrieve" do
    context "when host is invalid" do
      before do
        topic_retriever.stubs(:invalid_url?).returns(true)
      end

      it "does not perform_retrieve" do
        topic_retriever.expects(:perform_retrieve).never
        topic_retriever.retrieve
      end
    end

    context "when topics have been retrieived recently" do
      before do
        topic_retriever.stubs(:retrieved_recently?).returns(true)
      end

      it "does not perform_retrieve" do
        topic_retriever.expects(:perform_retrieve).never
        topic_retriever.retrieve
      end
    end

    context "when host is not invalid" do
      before do
        topic_retriever.stubs(:invalid_url?).returns(false)
      end

      context "when topics have been retrieived recently" do
        before do
          topic_retriever.stubs(:retrieved_recently?).returns(true)
        end

        it "does not perform_retrieve" do
          topic_retriever.expects(:perform_retrieve).never
          topic_retriever.retrieve
        end
      end

      context "when topics have not been retrieived recently" do
        before do
          topic_retriever.stubs(:retrieved_recently?).returns(false)
        end

        it "does perform_retrieve" do
          topic_retriever.expects(:perform_retrieve).once
          topic_retriever.retrieve
        end
      end
    end
  end

end
