require 'spec_helper'

describe LinkThumbnailer::Fetcher do

  it { should respond_to :fetch }
  it { should respond_to :url }
  it { should respond_to :url= }

  let(:fetcher) { LinkThumbnailer::Fetcher.new }
  let(:url) { 'http://foo.com' }

  describe ".fetch" do

    before do
      LinkThumbnailer.configure {|config| config.redirect_count = 3}
    end

    context "when redirect_count is more than config" do

      it { expect { fetcher.fetch(url, 10) }.to raise_exception(ArgumentError) }

    end

    context "when no http error" do

      before do
        stub_request(:get, url).to_return(status: 200, body: 'foo', headers: {})
      end

      it "returns body response" do
        fetcher.fetch(url).should eq('foo')
      end

      it "sets fetcher url" do
        fetcher.fetch(url)
        fetcher.url.to_s.should eq(url)
      end

    end

    context "when http redirection" do

      context "and relative uri" do

        let(:another_url) { '/bar' }

        before do
          stub_request(:get, url).to_return(status: 300, body: 'foo', headers: { 'Location' => another_url })
          stub_request(:get, url + another_url).to_return(status: 200, body: 'bar', headers: {})
        end

        it "returns body response" do
          fetcher.fetch(url).should eq('bar')
        end

        it "sets fetcher url" do
          fetcher.fetch(url)
          fetcher.url.to_s.should eq(url + another_url)
        end

      end

      context "and absolute uri" do

        let(:another_url) { 'http://bar.com' }

        before do
          stub_request(:get, url).to_return(status: 300, body: 'foo', headers: { 'Location' => another_url })
          stub_request(:get, another_url).to_return(status: 200, body: 'bar', headers: {})
        end

        it "returns body response" do
          fetcher.fetch(url).should eq('bar')
        end

        it "sets fetcher url" do
          fetcher.fetch(url)
          fetcher.url.to_s.should eq(another_url)
        end

      end

    end

    context "when http error" do

      before do
        stub_request(:get, url).to_return(status: 500, body: 'foo', headers: {})
      end

      it { expect { fetcher.fetch(url) }.to raise_exception(Net::HTTPFatalError) }

    end

  end

end