Rename FetchRemoteResourceService to ResolveURLService (#6328)

The service used to be named FetchRemoteResourceService resolves local
URL as well.

spec/services/resolve_url_service_spec.rb

@@ -0,0 +1,53 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+
+describe ResolveURLService do
+  subject { described_class.new }
+
+  describe '#call' do
+    it 'returns nil when there is no atom url' do
+      url = 'http://example.com/missing-atom'
+      service = double
+      allow(FetchAtomService).to receive(:new).and_return service
+      allow(service).to receive(:call).with(url).and_return(nil)
+
+      result = subject.call(url)
+      expect(result).to be_nil
+    end
+
+    it 'fetches remote accounts for feed types' do
+      url = 'http://example.com/atom-feed'
+      service = double
+      allow(FetchAtomService).to receive(:new).and_return service
+      feed_url = 'http://feed-url'
+      feed_content = '<feed>contents</feed>'
+      allow(service).to receive(:call).with(url).and_return([feed_url, { prefetched_body: feed_content }])
+
+      account_service = double
+      allow(FetchRemoteAccountService).to receive(:new).and_return(account_service)
+      allow(account_service).to receive(:call)
+
+      _result = subject.call(url)
+
+      expect(account_service).to have_received(:call).with(feed_url, feed_content, nil)
+    end
+
+    it 'fetches remote statuses for entry types' do
+      url = 'http://example.com/atom-entry'
+      service = double
+      allow(FetchAtomService).to receive(:new).and_return service
+      feed_url = 'http://feed-url'
+      feed_content = '<entry>contents</entry>'
+      allow(service).to receive(:call).with(url).and_return([feed_url, { prefetched_body: feed_content }])
+
+      account_service = double
+      allow(FetchRemoteStatusService).to receive(:new).and_return(account_service)
+      allow(account_service).to receive(:call)
+
+      _result = subject.call(url)
+
+      expect(account_service).to have_received(:call).with(feed_url, feed_content, nil)
+    end
+  end
+end