test(auto_source): add spec for routes

spec/html2rss/web/helpers/auto_source_spec.rb

@@ -147,4 +147,18 @@
     end
   end
   # rubocop:enable RSpec/NamedSubject, RSpec/MessageSpies
+
+  describe '.build_auto_source_from_encoded_url' do
+    subject(:feed) do
+      VCR.use_cassette('auto_source-github-h2r-web', match_requests_on: [:host]) do
+        described_class.build_auto_source_from_encoded_url(encoded_url)
+      end
+    end
+
+    let(:encoded_url) { Base64.urlsafe_encode64('https://github.com/html2rss/html2rss-web') }
+
+    it 'returns an RSS::Rss object' do
+      expect(feed).to be_a(RSS::Rss)
+    end
+  end
 end

spec/routes/auto_source_spec.rb

@@ -1,7 +1,7 @@
 # frozen_string_literal: true
 
 require 'spec_helper'
-
+require 'rss'
 require_relative '../../app'
 
 describe Html2rss::Web::App do # rubocop:disable RSpec/SpecFilePathFormat
@@ -57,17 +57,27 @@ def app = described_class
   describe "GET '/auto_source/:encoded_url'" do
     context 'with provided basic auth' do
       subject(:response) do
-        VCR.use_cassette('auto_source-github-h2r-web') do
-          get "/auto_source/#{Base64.urlsafe_encode64('https://github.com/html2rss/html2rss-web')}",
-              {},
-              request_headers.merge('HTTP_AUTHORIZATION' => basic_authorize(username, password))
+        get "/auto_source/#{Base64.urlsafe_encode64('https://github.com/html2rss/html2rss-web')}",
+            {},
+            request_headers.merge('HTTP_AUTHORIZATION' => basic_authorize(username, password))
+      end
+
+      let(:feed) do
+        RSS::Maker.make('2.0') do |maker|
+          maker.channel.title = 'title'
+          maker.channel.link = 'link'
+          maker.channel.description = 'description'
         end
       end
 
+      before do
+        allow(Html2rss::Web::AutoSource).to receive(:build_auto_source_from_encoded_url).and_return(feed)
+      end
+
       it 'responds successfully', :aggregate_failures do
         expect(response).to be_ok
         expect(response.body).to start_with '<?xml version="1.0" encoding="UTF-8"?>'
-        expect(response.get_header('cache-control')).to eq 'must-revalidate, private, max-age=0'
+        expect(response.get_header('cache-control')).to eq 'must-revalidate, private, max-age=3600'
         expect(response.get_header('content-type')).to eq described_class::CONTENT_TYPE_RSS
       end
     end