add refund and event logic

tests/Unit/Services/Refunds/RefundNotificationServiceTest.php

@@ -0,0 +1,23 @@
+<?php
+
+namespace Tests\Unit\Services\Refunds;
+
+use App\Services\Refunds\RefundNotificationService;
+use Illuminate\Foundation\Testing\RefreshDatabase;
+use Illuminate\Support\Facades\Log;
+use Tests\TestCase;
+
+class RefundNotificationServiceTest extends TestCase
+{
+    use RefreshDatabase;
+
+    public function test_notify_pending_logs_event(): void
+    {
+        Log::spy();
+
+        $service = new RefundNotificationService();
+        $service->notifyPending(10, 50.25, 'https://example.test/login');
+
+        Log::shouldHaveReceived('info')->once();
+    }
+}