Convert tags controller spec to system and request specs (#31708)

spec/controllers/tags_controller_spec.rb

@@ -1,45 +0,0 @@
-# frozen_string_literal: true
-
-require 'rails_helper'
-
-RSpec.describe TagsController do
-  render_views
-
-  describe 'GET #show' do
-    let(:format) { 'html' }
-    let(:tag) { Fabricate(:tag, name: 'test') }
-    let(:tag_name) { tag&.name }
-
-    before do
-      get :show, params: { id: tag_name, format: format }
-    end
-
-    context 'when tag exists' do
-      context 'when requested as HTML' do
-        it 'returns http success' do
-          expect(response).to have_http_status(200)
-        end
-
-        it_behaves_like 'cacheable response', expects_vary: 'Accept, Accept-Language, Cookie'
-      end
-
-      context 'when requested as JSON' do
-        let(:format) { 'json' }
-
-        it 'returns http success' do
-          expect(response).to have_http_status(200)
-        end
-
-        it_behaves_like 'cacheable response', expects_vary: 'Accept, Accept-Language, Cookie'
-      end
-    end
-
-    context 'when tag does not exist' do
-      let(:tag_name) { 'hoge' }
-
-      it 'returns http not found' do
-        expect(response).to have_http_status(404)
-      end
-    end
-  end
-end