Restructure omni services and add Chatwoot research snapshot

research/chatwoot/spec/enterprise/models/account_user_spec.rb

@@ -0,0 +1,53 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+
+RSpec.describe AccountUser, type: :model do
+  describe 'associations' do
+    # option and dependant nullify
+    it { is_expected.to belong_to(:custom_role).optional }
+  end
+
+  describe 'permissions' do
+    context 'when custom role is assigned' do
+      it 'returns permissions of the custom role along with `custom_role` permission' do
+        account = create(:account)
+        custom_role = create(:custom_role, account: account)
+        account_user = create(:account_user, account: account, custom_role: custom_role)
+
+        expect(account_user.permissions).to eq(custom_role.permissions + ['custom_role'])
+      end
+    end
+
+    context 'when custom role is not assigned' do
+      it 'returns permissions of the default role' do
+        account = create(:account)
+        account_user = create(:account_user, account: account)
+
+        expect(account_user.permissions).to eq([account_user.role])
+      end
+    end
+  end
+
+  describe 'audit log' do
+    context 'when account user is created' do
+      it 'has associated audit log created' do
+        account_user = create(:account_user)
+        account_user_audit_log = Audited::Audit.where(auditable_type: 'AccountUser', action: 'create').first
+        expect(account_user_audit_log).to be_present
+        expect(account_user_audit_log.associated).to eq(account_user.account)
+      end
+    end
+
+    context 'when account user is updated' do
+      it 'has associated audit log created' do
+        account_user = create(:account_user)
+        account_user.update!(availability: 'offline')
+        account_user_audit_log = Audited::Audit.where(auditable_type: 'AccountUser', action: 'update').first
+        expect(account_user_audit_log).to be_present
+        expect(account_user_audit_log.associated).to eq(account_user.account)
+        expect(account_user_audit_log.audited_changes).to eq('availability' => [0, 1])
+      end
+    end
+  end
+end