[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
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1 changed files with 65 additions and 67 deletions
319
tests/Unit/Server/Handler/Request/ListToolsHandlerTest.php
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319
tests/Unit/Server/Handler/Request/ListToolsHandlerTest.php
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<?php
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/*
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* This file is part of the official PHP MCP SDK.
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*
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* A collaboration between Symfony and the PHP Foundation.
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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namespace Mcp\Tests\Unit\Server\Handler\Request;
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use Mcp\Capability\Registry;
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use Mcp\Exception\InvalidCursorException;
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use Mcp\Schema\Request\ListToolsRequest;
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use Mcp\Schema\Result\ListToolsResult;
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use Mcp\Schema\Tool;
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use Mcp\Server\Handler\Request\ListToolsHandler;
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use Mcp\Server\Session\InMemorySessionStore;
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use Mcp\Server\Session\Session;
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use Mcp\Server\Session\SessionInterface;
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use PHPUnit\Framework\Attributes\TestDox;
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use PHPUnit\Framework\TestCase;
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class ListToolsHandlerTest extends TestCase
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{
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private Registry $registry;
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private ListToolsHandler $handler;
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private SessionInterface $session;
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protected function setUp(): void
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{
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$this->registry = new Registry();
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$this->handler = new ListToolsHandler($this->registry, pageSize: 3); // Use small page size for testing
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$this->session = new Session(new InMemorySessionStore());
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}
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#[TestDox('Returns first page when no cursor provided')]
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public function testReturnsFirstPageWhenNoCursorProvided(): void
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{
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// Arrange
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$this->addToolsToRegistry(5);
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$request = $this->createListToolsRequest();
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// Act
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$response = $this->handler->handle($request, $this->session);
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// Assert
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/** @var ListToolsResult $result */
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$result = $response->result;
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$this->assertInstanceOf(ListToolsResult::class, $result);
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$this->assertCount(3, $result->tools);
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$this->assertNotNull($result->nextCursor);
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$this->assertEquals('tool_0', $result->tools[0]->name);
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$this->assertEquals('tool_1', $result->tools[1]->name);
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$this->assertEquals('tool_2', $result->tools[2]->name);
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}
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#[TestDox('Returns paginated tools with cursor')]
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public function testReturnsPaginatedToolsWithCursor(): void
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{
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// Arrange
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$this->addToolsToRegistry(10);
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$request = $this->createListToolsRequest(cursor: null);
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// Act
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$response = $this->handler->handle($request, $this->session);
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// Assert
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/** @var ListToolsResult $result */
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$result = $response->result;
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$this->assertInstanceOf(ListToolsResult::class, $result);
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$this->assertCount(3, $result->tools);
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$this->assertNotNull($result->nextCursor);
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$this->assertEquals('tool_0', $result->tools[0]->name);
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$this->assertEquals('tool_1', $result->tools[1]->name);
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$this->assertEquals('tool_2', $result->tools[2]->name);
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}
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#[TestDox('Returns second page with cursor')]
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public function testReturnsSecondPageWithCursor(): void
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{
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// Arrange
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$this->addToolsToRegistry(10);
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$firstPageRequest = $this->createListToolsRequest();
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$firstPageResponse = $this->handler->handle($firstPageRequest, $this->session);
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/** @var ListToolsResult $firstPageResult */
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$firstPageResult = $firstPageResponse->result;
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$secondPageRequest = $this->createListToolsRequest(cursor: $firstPageResult->nextCursor);
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// Act
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$response = $this->handler->handle($secondPageRequest, $this->session);
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// Assert
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/** @var ListToolsResult $result */
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$result = $response->result;
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$this->assertInstanceOf(ListToolsResult::class, $result);
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$this->assertCount(3, $result->tools);
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$this->assertNotNull($result->nextCursor);
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$this->assertEquals('tool_3', $result->tools[0]->name);
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$this->assertEquals('tool_4', $result->tools[1]->name);
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$this->assertEquals('tool_5', $result->tools[2]->name);
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}
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#[TestDox('Returns last page with null cursor')]
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public function testReturnsLastPageWithNullCursor(): void
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{
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// Arrange
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$this->addToolsToRegistry(5);
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$firstPageRequest = $this->createListToolsRequest();
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$firstPageResponse = $this->handler->handle($firstPageRequest, $this->session);
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/** @var ListToolsResult $firstPageResult */
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$firstPageResult = $firstPageResponse->result;
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$secondPageRequest = $this->createListToolsRequest(cursor: $firstPageResult->nextCursor);
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// Act
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$response = $this->handler->handle($secondPageRequest, $this->session);
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// Assert
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/** @var ListToolsResult $result */
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$result = $response->result;
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$this->assertInstanceOf(ListToolsResult::class, $result);
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$this->assertCount(2, $result->tools);
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$this->assertNull($result->nextCursor);
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$this->assertEquals('tool_3', $result->tools[0]->name);
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$this->assertEquals('tool_4', $result->tools[1]->name);
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}
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#[TestDox('Returns all tools when count is less than page size')]
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public function testReturnsAllToolsWhenCountIsLessThanPageSize(): void
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{
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// Arrange
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$this->addToolsToRegistry(2); // Less than page size 3
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$request = $this->createListToolsRequest();
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// Act
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$response = $this->handler->handle($request, $this->session);
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// Assert
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/** @var ListToolsResult $result */
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$result = $response->result;
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$this->assertInstanceOf(ListToolsResult::class, $result);
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$this->assertCount(2, $result->tools);
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$this->assertNull($result->nextCursor);
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$this->assertEquals('tool_0', $result->tools[0]->name);
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$this->assertEquals('tool_1', $result->tools[1]->name);
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}
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#[TestDox('Handles empty registry')]
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public function testHandlesEmptyRegistry(): void
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{
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// Arrange
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$request = $this->createListToolsRequest();
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// Act
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$response = $this->handler->handle($request, $this->session);
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// Assert
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/** @var ListToolsResult $result */
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$result = $response->result;
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$this->assertInstanceOf(ListToolsResult::class, $result);
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$this->assertCount(0, $result->tools);
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$this->assertNull($result->nextCursor);
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}
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#[TestDox('Throws exception for invalid cursor')]
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public function testThrowsExceptionForInvalidCursor(): void
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{
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// Arrange
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$this->addToolsToRegistry(5);
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$request = $this->createListToolsRequest(cursor: 'invalid-cursor');
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// Assert
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$this->expectException(InvalidCursorException::class);
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// Act
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$this->handler->handle($request, $this->session);
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}
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#[TestDox('Throws exception for cursor beyond bounds')]
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public function testThrowsExceptionForCursorBeyondBounds(): void
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{
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// Arrange
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$this->addToolsToRegistry(5);
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$outOfBoundsCursor = base64_encode('100');
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$request = $this->createListToolsRequest(cursor: $outOfBoundsCursor);
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// Assert
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$this->expectException(InvalidCursorException::class);
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// Act
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$this->handler->handle($request, $this->session);
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}
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#[TestDox('Handles cursor at exact boundary')]
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public function testHandlesCursorAtExactBoundary(): void
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{
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// Arrange
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$this->addToolsToRegistry(6);
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$exactBoundaryCursor = base64_encode('6');
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$request = $this->createListToolsRequest(cursor: $exactBoundaryCursor);
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// Act
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$response = $this->handler->handle($request, $this->session);
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// Assert
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/** @var ListToolsResult $result */
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$result = $response->result;
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$this->assertInstanceOf(ListToolsResult::class, $result);
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$this->assertCount(0, $result->tools);
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$this->assertNull($result->nextCursor);
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}
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#[TestDox('Maintains stable cursors across calls')]
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public function testMaintainsStableCursorsAcrossCalls(): void
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{
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// Arrange
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$this->addToolsToRegistry(10);
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// Act
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$request = $this->createListToolsRequest();
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$response1 = $this->handler->handle($request, $this->session);
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$response2 = $this->handler->handle($request, $this->session);
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// Assert
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/** @var ListToolsResult $result1 */
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$result1 = $response1->result;
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/** @var ListToolsResult $result2 */
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$result2 = $response2->result;
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$this->assertEquals($result1->nextCursor, $result2->nextCursor);
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$this->assertEquals($result1->tools, $result2->tools);
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}
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#[TestDox('Uses custom page size when provided')]
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public function testUsesCustomPageSizeWhenProvided(): void
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{
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// Arrange
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$customPageSize = 5;
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$customHandler = new ListToolsHandler($this->registry, pageSize: $customPageSize);
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$this->addToolsToRegistry(10);
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$request = $this->createListToolsRequest();
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// Act
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$response = $customHandler->handle($request, $this->session);
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// Assert
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/** @var ListToolsResult $result */
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$result = $response->result;
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$this->assertInstanceOf(ListToolsResult::class, $result);
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$this->assertCount($customPageSize, $result->tools);
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$this->assertNotNull($result->nextCursor);
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}
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#[TestDox('Different page sizes produce different pagination results')]
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public function testDifferentPageSizesProduceDifferentPaginationResults(): void
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{
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// Arrange
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$this->addToolsToRegistry(10);
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$smallPageHandler = new ListToolsHandler($this->registry, pageSize: 2);
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$largePageHandler = new ListToolsHandler($this->registry, pageSize: 7);
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$request = $this->createListToolsRequest();
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// Act
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$smallPageResponse = $smallPageHandler->handle($request, $this->session);
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$largePageResponse = $largePageHandler->handle($request, $this->session);
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// Assert
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/** @var ListToolsResult $smallResult */
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$smallResult = $smallPageResponse->result;
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/** @var ListToolsResult $largeResult */
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$largeResult = $largePageResponse->result;
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$this->assertCount(2, $smallResult->tools);
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$this->assertCount(7, $largeResult->tools);
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$this->assertNotNull($smallResult->nextCursor);
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$this->assertNotNull($largeResult->nextCursor);
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}
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private function addToolsToRegistry(int $count): void
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{
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for ($i = 0; $i < $count; ++$i) {
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$tool = new Tool(
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name: "tool_$i",
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inputSchema: [
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'type' => 'object',
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'properties' => [],
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'required' => [],
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],
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description: "Test tool $i",
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annotations: null
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);
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$this->registry->registerTool($tool, fn () => null);
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}
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}
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private function createListToolsRequest(?string $cursor = null): ListToolsRequest
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{
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$data = [
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'jsonrpc' => '2.0',
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'id' => 'test-request-id',
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'method' => 'tools/list',
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];
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if (null !== $cursor) {
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$data['params'] = ['cursor' => $cursor];
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}
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return ListToolsRequest::fromArray($data);
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}
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}
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