#431

backend/spec/db/tag_name_constraints_spec.rb

@@ -1,11 +1,17 @@
 require 'rails_helper'
 
 RSpec.describe 'TagName database invariants' do
-  def insert_name!(**attributes)
-    TagName.insert_all!([{ name: 'constraint_name', language_code: 'ja',
-                          script_code: 'Jpan', primary_flg: true,
-                          created_at: Time.current, updated_at: Time.current,
-                          **attributes }])
+  def insert_name! **attributes
+    defaults = {
+        tag_id: create(:tag, primary_tag_name: nil).id,
+        name: 'constraint_name',
+        language_code: 'ja',
+        script_code: 'Jpan',
+        primary_flg: true,
+        created_at: Time.current,
+        updated_at: Time.current }
+
+    TagName.insert_all!([defaults.merge(attributes)])
   end
 
   it 'defaults persisted names to human-confirmed provenance' do
@@ -33,4 +39,9 @@ RSpec.describe 'TagName database invariants' do
         .to raise_error(ActiveRecord::RecordNotUnique)
     expect(TagName.where(tag:, language_code: 'ja', primary_flg: true).count).to eq(1)
   end
+
+  it 'rejects a name without a tag' do
+    expect { insert_name!(tag_id: nil) }
+        .to raise_error(ActiveRecord::NotNullViolation)
+  end
 end