Test the new notification publisher

Author: Bellangelo

src/Server/NotificationPublisher.php

@@ -43,7 +43,7 @@ public static function make(EventDispatcher $eventDispatcher): self
         return $instance;
     }
 
-    public function onEvent(object $event): void
+    public function onEvent(Event $event): void
     {
         $eventClass = $event::class;
         if (!isset(self::EVENTS_TO_NOTIFICATIONS[$eventClass])) {

tests/Server/NotificationPublisherTest.php

@@ -0,0 +1,36 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Mcp\Tests\Server;
+
+use Mcp\JsonRpc\MessageFactory;
+use Mcp\Server\NotificationPublisher;
+use PHPUnit\Framework\TestCase;
+use Symfony\Contracts\EventDispatcher\Event;
+
+class NotificationPublisherTest extends TestCase
+{
+    public function testOnEventCreatesNotification(): void
+    {
+        $expectedNotifications = [];
+        $notificationPublisher = new NotificationPublisher(MessageFactory::make());
+
+        foreach (NotificationPublisher::EVENTS_TO_NOTIFICATIONS as $eventClass => $notificationClass) {
+            /** @var Event $event */
+            $event = new $eventClass();
+            $notificationPublisher->onEvent($event);
+            $expectedNotifications[] = $notificationClass;
+        }
+
+        $flushedNotifications = $notificationPublisher->flush();
+
+        $this->assertCount(count($expectedNotifications), $flushedNotifications);
+
+        foreach ($flushedNotifications as $index => $notification) {
+            $this->assertInstanceOf($expectedNotifications[$index], $notification);
+        }
+
+        $this->assertEmpty($notificationPublisher->flush());
+    }
+}