feat: タグ補完から 0 件を除外（#109） (#245)

#109

#109

Co-authored-by: miteruzo <miteruzo@naver.com>
Reviewed-on: #245

backend/spec/requests/tags_spec.rb

@@ -4,8 +4,12 @@ require 'rails_helper'
 
 RSpec.describe 'Tags API', type: :request do
   let!(:tn) { TagName.create!(name: 'spec_tag') }
-  let!(:tag) { Tag.create!(tag_name: tn, category: 'general') }
+  let!(:tag) { Tag.create!(tag_name: tn, category: :general) }
   let!(:alias_tn) { TagName.create!(name: 'unko', canonical: tn) }
+  let!(:post) { Post.create!(url: 'https://example.com/unkounkounko') }
+  let!(:post_tag) { PostTag.create!(post:, tag:) }
+  let!(:tn2) { TagName.create!(name: 'unknown') }
+  let!(:tag2) { Tag.create!(tag_name: tn2, category: :general) }
 
   describe 'GET /tags' do
     it 'returns tags with name' do
@@ -71,6 +75,7 @@ RSpec.describe 'Tags API', type: :request do
       expect(json.map { |t| t['name'] }).to include('spec_tag')
       t = json.find { |t| t['name'] == 'spec_tag' }
       expect(t['matched_alias']).to eq('unko')
+      expect(json.map { |t| t['name'] }).not_to include('unknown')
     end
   end