#90

backend/spec/requests/nico_tags_spec.rb

@@ -91,5 +91,33 @@ RSpec.describe 'NicoTags', type: :request do
       expect(json.fetch('errors')).to include(
           'tags' => ['ニコニコ・タグ同士は連携できません．'])
     end
+
+    it 'returns the tags field error when a nico tag is specified directly' do
+      sign_in_as(member)
+
+      patch "/tags/nico/#{nico_tag.id}", params: { tags: 'nico:linked_ng' }
+
+      expect(response).to have_http_status(:unprocessable_entity)
+      expect(json.fetch('errors')).to include(
+          'tags' => ['ニコニコ・タグ同士は連携できません．'])
+    end
+
+    it 'returns tag name validation errors on the tags field and rolls back created tags' do
+      sign_in_as(member)
+      TagNameSanitisationRule.create!(
+        priority: 1,
+        source_pattern: 'invalid',
+        replacement: 'valid'
+      )
+      nico_tag
+
+      expect {
+        patch "/tags/nico/#{nico_tag.id}", params: { tags: 'created_first invalid' }
+      }.not_to change(TagName, :count)
+
+      expect(response).to have_http_status(:unprocessable_entity)
+      expect(json.fetch('errors').fetch('tags')).to include(
+          a_string_including('タグ名 “invalid”:', '名前に使用できない文字が含まれてゐます．'))
+    end
   end
 end