多言語化の基盤作り (#55) (#421)

Reviewed-on: #421
Co-authored-by: miteruzo <miteruzo@naver.com>

backend/spec/tasks/post_similarity_calc_spec.rb

@@ -6,10 +6,10 @@ RSpec.describe 'post_similarity:calc' do
 
   it 'calculates similarities from active tags only' do
     # 必要最低限のデータ
-    t1 = Tag.create!(name: "t1")
-    t2 = Tag.create!(name: "t2")
-    t3 = Tag.create!(name: "t3")
-    deprecated_tag = Tag.create!(name: 'deprecated', deprecated_at: Time.current)
+    t1 = create(:tag, primary_name: 't1')
+    t2 = create(:tag, primary_name: 't2')
+    t3 = create(:tag, primary_name: 't3')
+    deprecated_tag = create(:tag, primary_name: 'deprecated', deprecated_at: Time.current)
 
     p1 = Post.create!(url: "https://example.com/1")
     p2 = Post.create!(url: "https://example.com/2")