Kick off the SDK based on Symfony's MCP SDK

tests/Server/RequestHandler/PromptListHandlerTest.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\RequestHandler;
+
+use Mcp\Capability\Prompt\MetadataInterface;
+use Mcp\Capability\PromptChain;
+use Mcp\Message\Request;
+use Mcp\Server\RequestHandler\PromptListHandler;
+use PHPUnit\Framework\Attributes\CoversClass;
+use PHPUnit\Framework\Attributes\Small;
+use PHPUnit\Framework\TestCase;
+
+#[Small]
+#[CoversClass(PromptListHandler::class)]
+class PromptListHandlerTest extends TestCase
+{
+    public function testHandleEmpty(): void
+    {
+        $handler = new PromptListHandler(new PromptChain([]));
+        $message = new Request(1, 'prompts/list', []);
+        $response = $handler->createResponse($message);
+        $this->assertEquals(1, $response->id);
+        $this->assertEquals(['prompts' => []], $response->result);
+    }
+
+    public function testHandleReturnAll(): void
+    {
+        $item = self::createMetadataItem();
+        $handler = new PromptListHandler(new PromptChain([$item]));
+        $message = new Request(1, 'prompts/list', []);
+        $response = $handler->createResponse($message);
+        $this->assertCount(1, $response->result['prompts']);
+        $this->assertArrayNotHasKey('nextCursor', $response->result);
+    }
+
+    public function testHandlePagination(): void
+    {
+        $item = self::createMetadataItem();
+        $handler = new PromptListHandler(new PromptChain([$item, $item]), 2);
+        $message = new Request(1, 'prompts/list', []);
+        $response = $handler->createResponse($message);
+        $this->assertCount(2, $response->result['prompts']);
+        $this->assertArrayHasKey('nextCursor', $response->result);
+    }
+
+    private static function createMetadataItem(): MetadataInterface
+    {
+        return new class implements MetadataInterface {
+            public function getName(): string
+            {
+                return 'greet';
+            }
+
+            public function getDescription(): string
+            {
+                return 'Greet a person with a nice message';
+            }
+
+            public function getArguments(): array
+            {
+                return [
+                    [
+                        'name' => 'first name',
+                        'description' => 'The name of the person to greet',
+                        'required' => false,
+                    ],
+                ];
+            }
+        };
+    }
+}