Introduce Capability Registry & Discovery

tests/Capability/Attribute/McpResourceTest.php

@@ -0,0 +1,77 @@
+<?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\Capability\Attribute;
+
+use Mcp\Capability\Attribute\McpResource;
+use PHPUnit\Framework\TestCase;
+
+class McpResourceTest extends TestCase
+{
+    public function testInstantiatesWithCorrectProperties(): void
+    {
+        // Arrange
+        $uri = 'file:///test/resource';
+        $name = 'test-resource-name';
+        $description = 'This is a test resource description.';
+        $mimeType = 'text/plain';
+        $size = 1024;
+
+        // Act
+        $attribute = new McpResource(
+            uri: $uri,
+            name: $name,
+            description: $description,
+            mimeType: $mimeType,
+            size: $size,
+        );
+
+        // Assert
+        $this->assertSame($uri, $attribute->uri);
+        $this->assertSame($name, $attribute->name);
+        $this->assertSame($description, $attribute->description);
+        $this->assertSame($mimeType, $attribute->mimeType);
+        $this->assertSame($size, $attribute->size);
+    }
+
+    public function testInstantiatesWithNullValuesForNameAndDescription(): void
+    {
+        // Arrange & Act
+        $attribute = new McpResource(
+            uri: 'file:///test', // URI is required
+            name: null,
+            description: null,
+            mimeType: null,
+            size: null,
+        );
+
+        // Assert
+        $this->assertSame('file:///test', $attribute->uri);
+        $this->assertNull($attribute->name);
+        $this->assertNull($attribute->description);
+        $this->assertNull($attribute->mimeType);
+        $this->assertNull($attribute->size);
+    }
+
+    public function testInstantiatesWithMissingOptionalArguments(): void
+    {
+        // Arrange & Act
+        $uri = 'file:///only-uri';
+        $attribute = new McpResource(uri: $uri);
+
+        // Assert
+        $this->assertSame($uri, $attribute->uri);
+        $this->assertNull($attribute->name);
+        $this->assertNull($attribute->description);
+        $this->assertNull($attribute->mimeType);
+        $this->assertNull($attribute->size);
+    }
+}