require "spec_helper"

describe Alephant::Broker::LoadStrategy::HTTP do
  subject { described_class.new(url_generator) }

  let(:component_meta) do
    instance_double(Alephant::Broker::ComponentMeta,
      :id            => "test",
      :options       => {},
      :component_key => "cache_key"
    )
  end
  let(:url_generator) { double(:generate => "http://foo.bar") }
  let(:cache) { instance_double(Alephant::Broker::Cache::Client) }
  let(:body) { "<h1>Batman!</h1>" }
  let(:content) do
    {
      :content      => body,
      :content_type => "text/html"
    }
  end

  before :each do
    allow(Alephant::Broker::Cache::Client).to receive(:new) { cache }
  end

  describe "#load" do
    context "content in cache" do
      before :each do
        allow(cache).to receive(:get) { content }
      end

      it "gets from cache" do
        expect(subject.load(component_meta)).to eq content
      end
    end

    context "content not in cache" do
      before :each do
        allow(cache).to receive(:get).and_yield
      end

      context "and available over HTTP" do
        let(:env) { double("env", :response_headers => response_headers) }
        let(:response_headers) { { "content-type" => "text/html; test" } }

        before :each do
          allow(Faraday).to receive(:get) do
            instance_double(
              "Faraday::Response",
              :body       => body,
              :'success?' => true,
              :env        => env
            )
          end
        end

        it "gets from HTTP" do
          expect(subject.load(component_meta)).to eq content
        end
      end

      context "and HTTP request fails" do
        before :each do
          allow(Faraday).to receive(:get).and_raise
        end

        specify do
          expect do
            subject.load component_meta
          end.to raise_error(RuntimeError)
        end
      end

      context "and HTTP request 404s" do
        before :each do
          allow(Faraday).to receive(:get) do
            instance_double("Faraday::Response", :body => body, :'success?' => false)
          end
        end

        specify do
          expect do
            subject.load component_meta
          end.to raise_error(Alephant::Broker::Errors::ContentNotFound)
        end
      end
    end
  end
end