add all controllers logic

tests/Unit/Services/Preferences/PreferencesCommandServiceTest.php

@@ -0,0 +1,30 @@
+<?php
+
+namespace Tests\Unit\Services\Preferences;
+
+use App\Services\Preferences\PreferencesCommandService;
+use Illuminate\Foundation\Testing\RefreshDatabase;
+use Tests\TestCase;
+
+class PreferencesCommandServiceTest extends TestCase
+{
+    use RefreshDatabase;
+
+    public function test_upsert_creates_record(): void
+    {
+        $service = app(PreferencesCommandService::class);
+        $pref = $service->upsert(1, [
+            'receive_email_notifications' => true,
+            'receive_sms_notifications' => false,
+            'theme' => 'light',
+            'language' => 'en',
+        ]);
+
+        $this->assertSame(1, $pref->user_id);
+        $this->assertDatabaseHas('user_preferences', [
+            'user_id' => 1,
+            'notification_email' => 1,
+            'notification_sms' => 0,
+        ]);
+    }
+}