Add VCR to fetcher and scraper specs

spec/fetcher_spec.rb

 
   describe '#thread' do
     it "fetches a thread" do
-      result = subject.thread({ remote_id: 49668 })
-      aggregate_failures do
-        expect(result).to be_a(Nokogiri::HTML::Document)
-        expect(result.at_css('.post:first-child').text)
-          .to include('reddwarf posted this March 30th, 2020 @ 3:29:23 am')
+      VCR.use_cassette "fetch_a_thread" do
+        result = subject.thread({ remote_id: 49668 })
+        aggregate_failures do
+          expect(result).to be_a(Nokogiri::HTML::Document)
+          expect(result.at_css('.post:first-child').text)
+            .to include('reddwarf posted this March 30th, 2020 @ 3:29:23 am')
+        end
       end
     end
   end
 
   describe '#page' do
     it "fetches a page of threads" do
-      result = subject.page(0)
-      aggregate_failures do
-        expect(result).to be_a(Nokogiri::HTML::Document)
-        expect(result.at_css('h3').text).to eq('VLV: politics, food, and aging')
-        expect(result.css('.even, .odd').length).to eq(110)
+      VCR.use_cassette "fetch_a_page_of_threads" do
+        result = subject.page(0)
+        aggregate_failures do
+          expect(result).to be_a(Nokogiri::HTML::Document)
+          expect(result.at_css('h3').text).to eq('VLV: politics, food, and aging')
+          expect(result.css('.even, .odd').length).to eq(110)
+        end
       end
     end
   end

spec/scraper_spec.rb

 
   describe '#initialize' do
     it 'authenticates' do
-      expect(subject.send(:cookie)).to_not be_nil
+      VCR.use_cassette "authentication" do
+        expect(subject.send(:cookie)).to_not be_nil
+      end
     end
   end