[Server] Reorganize server handlers and transport structure for better organization (#86)

* refactor: reorganize server handlers and transport structure

* feat: move the test files to corresponding directories

* fix: linter issues

* fix: correct PHPDoc formatting and streamline handler imports

* refactor: update import statement for ServerBuilder to Builder
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Kyrian Obikwelu 2025-09-28 23:58:04 +01:00 • committed by GitHub
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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\Unit\Server\RequestHandler;
use Mcp\Capability\Resource\ResourceReaderInterface;
use Mcp\Exception\ResourceNotFoundException;
use Mcp\Exception\ResourceReadException;
use Mcp\Schema\Content\BlobResourceContents;
use Mcp\Schema\Content\TextResourceContents;
use Mcp\Schema\JsonRpc\Error;
use Mcp\Schema\JsonRpc\Response;
use Mcp\Schema\Request\ReadResourceRequest;
use Mcp\Schema\Result\ReadResourceResult;
use Mcp\Server\RequestHandler\ReadResourceHandler;
use Mcp\Server\Session\SessionInterface;
use PHPUnit\Framework\MockObject\MockObject;
use PHPUnit\Framework\TestCase;
class ReadResourceHandlerTest extends TestCase
{
private ReadResourceHandler $handler;
private ResourceReaderInterface|MockObject $resourceReader;
private SessionInterface|MockObject $session;
protected function setUp(): void
{
$this->resourceReader = $this->createMock(ResourceReaderInterface::class);
$this->session = $this->createMock(SessionInterface::class);
$this->handler = new ReadResourceHandler($this->resourceReader);
}
public function testSupportsReadResourceRequest(): void
{
$request = $this->createReadResourceRequest('file://test.txt');
$this->assertTrue($this->handler->supports($request));
}
public function testHandleSuccessfulResourceRead(): void
{
$uri = 'file://documents/readme.txt';
$request = $this->createReadResourceRequest($uri);
$expectedContent = new TextResourceContents(
uri: $uri,
mimeType: 'text/plain',
text: 'This is the content of the readme file.',
);
$expectedResult = new ReadResourceResult([$expectedContent]);
$this->resourceReader
->expects($this->once())
->method('read')
->with($request)
->willReturn($expectedResult);
$response = $this->handler->handle($request, $this->session);
$this->assertInstanceOf(Response::class, $response);
$this->assertEquals($request->getId(), $response->id);
$this->assertSame($expectedResult, $response->result);
}
public function testHandleResourceReadWithBlobContent(): void
{
$uri = 'file://images/logo.png';
$request = $this->createReadResourceRequest($uri);
$expectedContent = new BlobResourceContents(
uri: $uri,
mimeType: 'image/png',
blob: base64_encode('fake-image-data'),
);
$expectedResult = new ReadResourceResult([$expectedContent]);
$this->resourceReader
->expects($this->once())
->method('read')
->with($request)
->willReturn($expectedResult);
$response = $this->handler->handle($request, $this->session);
$this->assertInstanceOf(Response::class, $response);
$this->assertSame($expectedResult, $response->result);
}
public function testHandleResourceReadWithMultipleContents(): void
{
$uri = 'app://data/mixed-content';
$request = $this->createReadResourceRequest($uri);
$textContent = new TextResourceContents(
uri: $uri,
mimeType: 'text/plain',
text: 'Text part of the resource',
);
$blobContent = new BlobResourceContents(
uri: $uri,
mimeType: 'application/octet-stream',
blob: base64_encode('binary-data'),
);
$expectedResult = new ReadResourceResult([$textContent, $blobContent]);
$this->resourceReader
->expects($this->once())
->method('read')
->with($request)
->willReturn($expectedResult);
$response = $this->handler->handle($request, $this->session);
$this->assertInstanceOf(Response::class, $response);
$this->assertSame($expectedResult, $response->result);
$this->assertCount(2, $response->result->contents);
}
public function testHandleResourceNotFoundExceptionReturnsSpecificError(): void
{
$uri = 'file://nonexistent/file.txt';
$request = $this->createReadResourceRequest($uri);
$exception = new ResourceNotFoundException($request);
$this->resourceReader
->expects($this->once())
->method('read')
->with($request)
->willThrowException($exception);
$response = $this->handler->handle($request, $this->session);
$this->assertInstanceOf(Error::class, $response);
$this->assertEquals($request->getId(), $response->id);
$this->assertEquals(Error::RESOURCE_NOT_FOUND, $response->code);
$this->assertEquals('Resource not found for uri: "'.$uri.'".', $response->message);
}
public function testHandleResourceReadExceptionReturnsGenericError(): void
{
$uri = 'file://corrupted/file.txt';
$request = $this->createReadResourceRequest($uri);
$exception = new ResourceReadException(
$request,
new \RuntimeException('Failed to read resource: corrupted data'),
);
$this->resourceReader
->expects($this->once())
->method('read')
->with($request)
->willThrowException($exception);
$response = $this->handler->handle($request, $this->session);
$this->assertInstanceOf(Error::class, $response);
$this->assertEquals($request->getId(), $response->id);
$this->assertEquals(Error::INTERNAL_ERROR, $response->code);
$this->assertEquals('Error while reading resource', $response->message);
}
public function testHandleResourceReadWithDifferentUriSchemes(): void
{
$uriSchemes = [
'file://local/path/file.txt',
'http://example.com/resource',
'https://secure.example.com/api/data',
'ftp://files.example.com/document.pdf',
'app://internal/resource/123',
'custom-scheme://special/resource',
];
foreach ($uriSchemes as $uri) {
$request = $this->createReadResourceRequest($uri);
$expectedContent = new TextResourceContents(
uri: $uri,
mimeType: 'text/plain',
text: "Content for {$uri}",
);
$expectedResult = new ReadResourceResult([$expectedContent]);
$this->resourceReader
->expects($this->once())
->method('read')
->with($request)
->willReturn($expectedResult);
$response = $this->handler->handle($request, $this->session);
$this->assertInstanceOf(Response::class, $response);
$this->assertSame($expectedResult, $response->result);
// Reset the mock for next iteration
$this->resourceReader = $this->createMock(ResourceReaderInterface::class);
$this->handler = new ReadResourceHandler($this->resourceReader);
}
}
public function testHandleResourceReadWithSpecialCharactersInUri(): void
{
$uri = 'file://path/with spaces/äöü-file-ñ.txt';
$request = $this->createReadResourceRequest($uri);
$expectedContent = new TextResourceContents(
uri: $uri,
mimeType: 'text/plain',
text: 'Content with unicode characters: äöü ñ 世界 🚀',
);
$expectedResult = new ReadResourceResult([$expectedContent]);
$this->resourceReader
->expects($this->once())
->method('read')
->with($request)
->willReturn($expectedResult);
$response = $this->handler->handle($request, $this->session);
$this->assertInstanceOf(Response::class, $response);
$this->assertSame($expectedResult, $response->result);
}
public function testHandleResourceReadWithEmptyContent(): void
{
$uri = 'file://empty/file.txt';
$request = $this->createReadResourceRequest($uri);
$expectedContent = new TextResourceContents(
uri: $uri,
mimeType: 'text/plain',
text: '',
);
$expectedResult = new ReadResourceResult([$expectedContent]);
$this->resourceReader
->expects($this->once())
->method('read')
->with($request)
->willReturn($expectedResult);
$response = $this->handler->handle($request, $this->session);
$this->assertInstanceOf(Response::class, $response);
$this->assertSame($expectedResult, $response->result);
$this->assertInstanceOf(TextResourceContents::class, $response->result->contents[0]);
$this->assertEquals('', $response->result->contents[0]->text);
}
public function testHandleResourceReadWithDifferentMimeTypes(): void
{
$mimeTypes = [
'text/plain',
'text/html',
'application/json',
'application/xml',
'image/png',
'image/jpeg',
'application/pdf',
'video/mp4',
'audio/mpeg',
'application/octet-stream',
];
foreach ($mimeTypes as $i => $mimeType) {
$uri = "file://test/file{$i}";
$request = $this->createReadResourceRequest($uri);
if (str_starts_with($mimeType, 'text/') || str_starts_with($mimeType, 'application/json')) {
$expectedContent = new TextResourceContents(
uri: $uri,
mimeType: $mimeType,
text: "Content for {$mimeType}",
);
} else {
$expectedContent = new BlobResourceContents(
uri: $uri,
mimeType: $mimeType,
blob: base64_encode("binary-content-for-{$mimeType}"),
);
}
$expectedResult = new ReadResourceResult([$expectedContent]);
$this->resourceReader
->expects($this->once())
->method('read')
->with($request)
->willReturn($expectedResult);
$response = $this->handler->handle($request, $this->session);
$this->assertInstanceOf(Response::class, $response);
$this->assertSame($expectedResult, $response->result);
$this->assertEquals($mimeType, $response->result->contents[0]->mimeType);
// Reset the mock for next iteration
$this->resourceReader = $this->createMock(ResourceReaderInterface::class);
$this->handler = new ReadResourceHandler($this->resourceReader);
}
}
public function testHandleResourceNotFoundWithCustomMessage(): void
{
$uri = 'file://custom/missing.txt';
$request = $this->createReadResourceRequest($uri);
$exception = new ResourceNotFoundException($request);
$this->resourceReader
->expects($this->once())
->method('read')
->with($request)
->willThrowException($exception);
$response = $this->handler->handle($request, $this->session);
$this->assertInstanceOf(Error::class, $response);
$this->assertEquals(Error::RESOURCE_NOT_FOUND, $response->code);
$this->assertEquals('Resource not found for uri: "'.$uri.'".', $response->message);
}
public function testHandleResourceReadWithEmptyResult(): void
{
$uri = 'file://empty/resource';
$request = $this->createReadResourceRequest($uri);
$expectedResult = new ReadResourceResult([]);
$this->resourceReader
->expects($this->once())
->method('read')
->with($request)
->willReturn($expectedResult);
$response = $this->handler->handle($request, $this->session);
$this->assertInstanceOf(Response::class, $response);
$this->assertSame($expectedResult, $response->result);
$this->assertCount(0, $response->result->contents);
}
private function createReadResourceRequest(string $uri): ReadResourceRequest
{
return ReadResourceRequest::fromArray([
'jsonrpc' => '2.0',
'method' => ReadResourceRequest::getMethod(),
'id' => 'test-request-'.uniqid(),
'params' => [
'uri' => $uri,
],
]);
}
}