#399

backend/spec/services/youtube/sync_spec.rb

@@ -10,6 +10,21 @@ RSpec.describe Youtube::Sync do
     allow(sync).to receive(:attach_thumbnail_if_needed!)
   end
 
+  describe '#attach_thumbnail_if_needed!' do
+    it 'uses the common remote thumbnail attach path' do
+      post = create(:post, thumbnail_base: nil)
+      allow(sync).to receive(:attach_thumbnail_if_needed!).and_call_original
+
+      expect(post).to receive(:attach_thumbnail_from_url!)
+          .with('https://example.com/thumb.jpg')
+
+      sync.send(
+          :attach_thumbnail_if_needed!,
+          post,
+          'https://example.com/thumb.jpg')
+    end
+  end
+
   describe '#sync!' do
     it 'returns without fetching video details when no video ids are discovered' do
       allow(sync).to receive(:query_terms).and_return([])