Test existing pagination configuration in McpBundleTest

This extends the existing McpBundleTest with tests that verify:
- The default page_size parameter (20) is correctly set
- Custom page_size configuration works properly
- ResourceListHandler and PromptListHandler services are not yet registered

The tests show that pagination configuration is already implemented in the
bundle through the page_size parameter, which defaults to 20 and can be
customized via bundle configuration.

Author: OskarStark

src/mcp-bundle/tests/DependencyInjection/McpBundleTest.php

@@ -17,6 +17,7 @@
 use Symfony\AI\McpBundle\McpBundle;
 use Symfony\AI\McpSdk\Capability\Tool\IdentifierInterface;
 use Symfony\AI\McpSdk\Server\NotificationHandlerInterface;
+use Symfony\AI\McpSdk\Server\RequestHandler\ToolListHandler;
 use Symfony\AI\McpSdk\Server\RequestHandlerInterface;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 
@@ -143,6 +144,51 @@ public function testServerAutoconfigurations()
         $this->assertArrayHasKey('mcp.server.request_handler', $autoconfiguredInstances[RequestHandlerInterface::class]->getTags());
     }
 
+    public function testDefaultPageSizeConfiguration()
+    {
+        $container = $this->buildContainer([]);
+
+        // Test that the default page_size parameter is set to 20
+        $this->assertSame(20, $container->getParameter('mcp.page_size'));
+
+        // Test that ToolListHandler is registered
+        $this->assertTrue($container->hasDefinition('mcp.server.request_handler.tool_list'));
+
+        $definition = $container->getDefinition('mcp.server.request_handler.tool_list');
+        $this->assertSame(ToolListHandler::class, $definition->getClass());
+    }
+
+    public function testCustomPageSizeConfiguration()
+    {
+        $container = $this->buildContainer([
+            'mcp' => [
+                'page_size' => 50,
+            ],
+        ]);
+
+        // Test that the custom page_size parameter is set
+        $this->assertSame(50, $container->getParameter('mcp.page_size'));
+    }
+
+    public function testMissingHandlerServices()
+    {
+        $container = $this->buildContainer([
+            'mcp' => [
+                'client_transports' => [
+                    'stdio' => true,
+                    'sse' => false,
+                ],
+            ],
+        ]);
+
+        // Currently, only ToolListHandler is registered
+        $this->assertTrue($container->hasDefinition('mcp.server.request_handler.tool_list'));
+
+        // These services should be registered but are currently missing
+        $this->assertFalse($container->hasDefinition('mcp.server.request_handler.resource_list'));
+        $this->assertFalse($container->hasDefinition('mcp.server.request_handler.prompt_list'));
+    }
+
     private function buildContainer(array $configuration): ContainerBuilder
     {
         $container = new ContainerBuilder();