#399

backend/spec/tasks/nico_sync_spec.rb

@@ -60,6 +60,25 @@ RSpec.describe "nico:sync" do
     expect(active_tag_names).to include("bot操作")
   end
 
+  it '既存 post のサムネール取得に共通 attach 経路を使ふ' do
+    post = Post.create!(
+        title: 'old',
+        url: 'https://www.nicovideo.jp/watch/sm9',
+        uploaded_user: nil)
+    Tag.bot
+    Tag.tagme
+
+    stub_python([{ 'code' => 'sm9', 'title' => 't', 'tags' => [] }])
+    allow(URI).to receive(:open)
+        .and_return(
+            StringIO.new(
+                '<meta name="thumbnail" content="https://example.com/thumb.jpg">'))
+    expect(post).to receive(:attach_thumbnail_from_url!)
+        .with('https://example.com/thumb.jpg')
+
+    run_rake_task('nico:sync')
+  end
+
   it "既存 post にあった古い nico tag は active から外され、履歴として discard される" do
     post = Post.create!(title: "old", url: "https://www.nicovideo.jp/watch/sm9", uploaded_user: nil)