#55

backend/spec/services/tag_version_recorder_spec.rb

@@ -0,0 +1,47 @@
+require 'rails_helper'
+
+RSpec.describe TagVersionRecorder do
+  let(:user) { create_member_user! }
+  let(:tag) { create(:tag, primary_name: '日本語名') }
+
+  before do
+    Language.insert_all!([{ code: 'en', name: 'English', created_at: Time.current }])
+    Script.insert_all!([{ code: 'Latn', name: 'Latin', created_at: Time.current }])
+    Locale.insert_all!([{ code: 'en', language_code: 'en', script_code: 'Latn',
+                          name: 'English', created_at: Time.current }])
+    TagName.create!(tag:, language_code: 'ja', script_code: 'Jpan', name: '別名',
+                    primary_flg: false,
+                    canonical_id: tag.tag_name_id)
+    TagName.create!(tag:, language_code: 'en', script_code: 'Latn', name: 'English name',
+                    primary_flg: true)
+    TagName.create!(tag:, language_code: 'en', script_code: 'Latn', name: 'English alias',
+                    primary_flg: false)
+  end
+
+  it 'snapshots every language primary name and alias deterministically' do
+    version = described_class.record!(tag:, event_type: :create, created_by_user: user)
+
+    expect(version.names).to eq([
+      { 'language_code' => 'en', 'name' => 'English name', 'script_code' => 'Latn',
+        'primary_flg' => true },
+      { 'language_code' => 'en', 'name' => 'English alias', 'script_code' => 'Latn',
+        'primary_flg' => false },
+      { 'language_code' => 'ja', 'name' => '日本語名', 'script_code' => 'Jpan',
+        'primary_flg' => true },
+      { 'language_code' => 'ja', 'name' => '別名', 'script_code' => 'Jpan',
+        'primary_flg' => false }
+    ])
+  end
+
+  it 'creates a version for an English-only name change and preserves prior names' do
+    original = described_class.record!(tag:, event_type: :create, created_by_user: user)
+    TagName.find_by!(tag:, language_code: 'en', primary_flg: true).update!(name: 'Renamed')
+
+    updated = described_class.record!(tag:, event_type: :update, created_by_user: user)
+
+    expect(updated.version_no).to eq(2)
+    expect(original.reload.names).to include(
+      hash_including('language_code' => 'en', 'name' => 'English name'))
+    expect(updated.names).to include(hash_including('language_code' => 'en', 'name' => 'Renamed'))
+  end
+end