Kick off the SDK based on Symfony's MCP SDK

tests/Server/JsonRpcHandlerTest.php

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+<?php
+
+/*
+ * This file is part of the official PHP MCP SDK.
+ *
+ * A collaboration between Symfony and the PHP Foundation.
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Mcp\Tests\Server;
+
+use Mcp\Message\Factory;
+use Mcp\Message\Response;
+use Mcp\Server\JsonRpcHandler;
+use Mcp\Server\NotificationHandlerInterface;
+use Mcp\Server\RequestHandlerInterface;
+use PHPUnit\Framework\Attributes\CoversClass;
+use PHPUnit\Framework\Attributes\Small;
+use PHPUnit\Framework\Attributes\TestDox;
+use PHPUnit\Framework\TestCase;
+use Psr\Log\NullLogger;
+
+#[Small]
+#[CoversClass(JsonRpcHandler::class)]
+class JsonRpcHandlerTest extends TestCase
+{
+    #[TestDox('Make sure a single notification can be handled by multiple handlers.')]
+    public function testHandleMultipleNotifications(): void
+    {
+        $handlerA = $this->getMockBuilder(NotificationHandlerInterface::class)
+            ->disableOriginalConstructor()
+            ->onlyMethods(['supports', 'handle'])
+            ->getMock();
+        $handlerA->method('supports')->willReturn(true);
+        $handlerA->expects($this->once())->method('handle');
+
+        $handlerB = $this->getMockBuilder(NotificationHandlerInterface::class)
+            ->disableOriginalConstructor()
+            ->onlyMethods(['supports', 'handle'])
+            ->getMock();
+        $handlerB->method('supports')->willReturn(false);
+        $handlerB->expects($this->never())->method('handle');
+
+        $handlerC = $this->getMockBuilder(NotificationHandlerInterface::class)
+            ->disableOriginalConstructor()
+            ->onlyMethods(['supports', 'handle'])
+            ->getMock();
+        $handlerC->method('supports')->willReturn(true);
+        $handlerC->expects($this->once())->method('handle');
+
+        $jsonRpc = new JsonRpcHandler(new Factory(), [], [$handlerA, $handlerB, $handlerC], new NullLogger());
+        $result = $jsonRpc->process(
+            '{"jsonrpc": "2.0", "id": 1, "method": "notifications/foobar"}'
+        );
+        iterator_to_array($result);
+    }
+
+    #[TestDox('Make sure a single request can NOT be handled by multiple handlers.')]
+    public function testHandleMultipleRequests(): void
+    {
+        $handlerA = $this->getMockBuilder(RequestHandlerInterface::class)
+            ->disableOriginalConstructor()
+            ->onlyMethods(['supports', 'createResponse'])
+            ->getMock();
+        $handlerA->method('supports')->willReturn(true);
+        $handlerA->expects($this->once())->method('createResponse')->willReturn(new Response(1));
+
+        $handlerB = $this->getMockBuilder(RequestHandlerInterface::class)
+            ->disableOriginalConstructor()
+            ->onlyMethods(['supports', 'createResponse'])
+            ->getMock();
+        $handlerB->method('supports')->willReturn(false);
+        $handlerB->expects($this->never())->method('createResponse');
+
+        $handlerC = $this->getMockBuilder(RequestHandlerInterface::class)
+            ->disableOriginalConstructor()
+            ->onlyMethods(['supports', 'createResponse'])
+            ->getMock();
+        $handlerC->method('supports')->willReturn(true);
+        $handlerC->expects($this->never())->method('createResponse');
+
+        $jsonRpc = new JsonRpcHandler(new Factory(), [$handlerA, $handlerB, $handlerC], [], new NullLogger());
+        $result = $jsonRpc->process(
+            '{"jsonrpc": "2.0", "id": 1, "method": "request/foobar"}'
+        );
+        iterator_to_array($result);
+    }
+}