create_merge_token!

app/models/france_connect_information.rb

@@ -42,6 +42,13 @@ class FranceConnectInformation < ApplicationRecord
     touch # needed to update updated_at column
   end
 
+  def create_merge_token!
+    merge_token = SecureRandom.uuid
+    update(merge_token: merge_token, merge_token_created_at: Time.zone.now)
+
+    merge_token
+  end
+
   def valid_for_merge?
     (MERGE_VALIDITY.ago < merge_token_created_at) && user_id.nil?
   end

spec/models/france_connect_information_spec.rb

@@ -43,4 +43,15 @@ describe FranceConnectInformation, type: :model do
       it { is_expected.to be(false) }
     end
   end
+
+  describe '#create_merge_token!' do
+    let(:fci) { create(:france_connect_information) }
+
+    it 'returns a merge_token and register it s creation date' do
+      token = fci.create_merge_token!
+
+      expect(fci.merge_token).to eq(token)
+      expect(fci.merge_token_created_at).not_to be_nil
+    end
+  end
 end