Kick off the SDK based on Symfony's MCP SDK

tests/Message/ErrorTest.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\Message;
+
+use Mcp\Message\Error;
+use PHPUnit\Framework\Attributes\CoversClass;
+use PHPUnit\Framework\Attributes\Small;
+use PHPUnit\Framework\TestCase;
+
+#[Small]
+#[CoversClass(Error::class)]
+final class ErrorTest extends TestCase
+{
+    public function testWithIntegerId(): void
+    {
+        $error = new Error(1, -32602, 'Another error occurred');
+        $expected = [
+            'jsonrpc' => '2.0',
+            'id' => 1,
+            'error' => [
+                'code' => -32602,
+                'message' => 'Another error occurred',
+            ],
+        ];
+
+        $this->assertSame($expected, $error->jsonSerialize());
+    }
+
+    public function testWithStringId(): void
+    {
+        $error = new Error('abc', -32602, 'Another error occurred');
+        $expected = [
+            'jsonrpc' => '2.0',
+            'id' => 'abc',
+            'error' => [
+                'code' => -32602,
+                'message' => 'Another error occurred',
+            ],
+        ];
+
+        $this->assertSame($expected, $error->jsonSerialize());
+    }
+}

tests/Message/FactoryTest.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\Message;
+
+use Mcp\Exception\InvalidInputMessageException;
+use Mcp\Message\Factory;
+use Mcp\Message\Notification;
+use Mcp\Message\Request;
+use PHPUnit\Framework\Attributes\CoversClass;
+use PHPUnit\Framework\Attributes\Small;
+use PHPUnit\Framework\TestCase;
+
+#[Small]
+#[CoversClass(Factory::class)]
+final class FactoryTest extends TestCase
+{
+    private Factory $factory;
+
+    protected function setUp(): void
+    {
+        $this->factory = new Factory();
+    }
+
+    /**
+     * @param iterable<mixed> $items
+     */
+    private function first(iterable $items): mixed
+    {
+        foreach ($items as $item) {
+            return $item;
+        }
+
+        return null;
+    }
+
+    public function testCreateRequest(): void
+    {
+        $json = '{"jsonrpc": "2.0", "method": "test_method", "params": {"foo": "bar"}, "id": 123}';
+
+        $result = $this->first($this->factory->create($json));
+
+        $this->assertInstanceOf(Request::class, $result);
+        $this->assertSame('test_method', $result->method);
+        $this->assertSame(['foo' => 'bar'], $result->params);
+        $this->assertSame(123, $result->id);
+    }
+
+    public function testCreateNotification(): void
+    {
+        $json = '{"jsonrpc": "2.0", "method": "notifications/test_event", "params": {"foo": "bar"}}';
+
+        $result = $this->first($this->factory->create($json));
+
+        $this->assertInstanceOf(Notification::class, $result);
+        $this->assertSame('notifications/test_event', $result->method);
+        $this->assertSame(['foo' => 'bar'], $result->params);
+    }
+
+    public function testInvalidJson(): void
+    {
+        $this->expectException(\JsonException::class);
+
+        $this->first($this->factory->create('invalid json'));
+    }
+
+    public function testMissingMethod(): void
+    {
+        $result = $this->first($this->factory->create('{"jsonrpc": "2.0", "params": {}, "id": 1}'));
+        $this->assertInstanceOf(InvalidInputMessageException::class, $result);
+        $this->assertEquals('Invalid JSON-RPC request, missing "method".', $result->getMessage());
+    }
+
+    public function testBatchMissingMethod(): void
+    {
+        $results = $this->factory->create('[{"jsonrpc": "2.0", "params": {}, "id": 1}, {"jsonrpc": "2.0", "method": "notifications/test_event", "params": {}, "id": 2}]');
+
+        $results = iterator_to_array($results);
+        $result = array_shift($results);
+        $this->assertInstanceOf(InvalidInputMessageException::class, $result);
+        $this->assertEquals('Invalid JSON-RPC request, missing "method".', $result->getMessage());
+
+        $result = array_shift($results);
+        $this->assertInstanceOf(Notification::class, $result);
+    }
+}

tests/Message/ResponseTest.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\Message;
+
+use Mcp\Message\Response;
+use PHPUnit\Framework\Attributes\CoversClass;
+use PHPUnit\Framework\Attributes\Small;
+use PHPUnit\Framework\TestCase;
+
+#[Small]
+#[CoversClass(Response::class)]
+final class ResponseTest extends TestCase
+{
+    public function testWithIntegerId(): void
+    {
+        $response = new Response(1, ['foo' => 'bar']);
+        $expected = [
+            'jsonrpc' => '2.0',
+            'id' => 1,
+            'result' => ['foo' => 'bar'],
+        ];
+
+        $this->assertSame($expected, $response->jsonSerialize());
+    }
+
+    public function testWithStringId(): void
+    {
+        $response = new Response('abc', ['foo' => 'bar']);
+        $expected = [
+            'jsonrpc' => '2.0',
+            'id' => 'abc',
+            'result' => ['foo' => 'bar'],
+        ];
+
+        $this->assertSame($expected, $response->jsonSerialize());
+    }
+}