Refactor tests and MCPProtocol for cleanup and improvements

Updated test annotations for clarity and consistency by adding #[Small] and removing unused #[CoversClass]. Simplified MCPProtocol by using a readonly constructor property, eliminating redundant class property.

Author: klapaudius

src/Protocol/MCPProtocol.php

@@ -24,8 +24,6 @@ final class MCPProtocol implements MCPProtocolInterface
 {
     public const PROTOCOL_VERSION = '2024-11-05';
 
-    private TransportInterface $transport;
-
     /**
      * @var RequestHandler[]
      */
@@ -40,9 +38,8 @@ final class MCPProtocol implements MCPProtocolInterface
      * @param  TransportInterface  $transport  The transport implementation to use for communication
      * @return void
      */
-    public function __construct(TransportInterface $transport)
+    public function __construct(private readonly TransportInterface $transport)
     {
-        $this->transport = $transport;
         $this->transport->onMessage([$this, 'handleMessage']);
     }
 

tests/Services/ToolService/ToolParamsValidatorTest.php

@@ -4,11 +4,10 @@
 
 use KLP\KlpMcpServer\Exceptions\ToolParamsValidatorException;
 use KLP\KlpMcpServer\Services\ToolService\ToolParamsValidator;
+use PHPUnit\Framework\Attributes\Small;
 use PHPUnit\Framework\TestCase;
 
-/**
- * Tests for the ToolParamsValidator class and its validate method.
- */
+#[Small]
 class ToolParamsValidatorTest extends TestCase
 {
     public function test_validate_with_valid_arguments(): void