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[Schema][Server] feat: support sampling with tools (#409)

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* feat: support sampling with tools

* address sampling tools review feedback

* tighten sampling tools spec compliance

* drop SamplingStopReason enum in favor of open string

The spec leaves stopReason open for provider-specific values, so upcasting
the four known ones to enum cases makes every future enum addition a silent
BC break for string comparisons.

---------

Co-authored-by: Christopher Hertel <mail@christopher-hertel.de>
This commit is contained in:
wWzZb 2026-08-15 09:28:11 +08:00 • committed by GitHub
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53
tests/Unit/Schema/Result/CreateSamplingMessageResultTest.php Normal file
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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\Schema\Result;
use Mcp\Schema\Content\TextContent;
use Mcp\Schema\Content\ToolUseContent;
use Mcp\Schema\Result\CreateSamplingMessageResult;
use PHPUnit\Framework\TestCase;
final class CreateSamplingMessageResultTest extends TestCase
{
public function testArrayContentAndKnownStopReasonAreHydrated(): void
{
$result = CreateSamplingMessageResult::fromArray([
'role' => 'assistant',
'content' => [
['type' => 'text', 'text' => 'Checking weather.'],
['type' => 'tool_use', 'id' => 'call-1', 'name' => 'weather', 'input' => ['city' => 'Paris']],
],
'model' => 'test-model',
'stopReason' => 'toolUse',
'_meta' => ['traceId' => 'trace-1'],
]);
$this->assertInstanceOf(TextContent::class, $result->content[0]);
$this->assertInstanceOf(ToolUseContent::class, $result->content[1]);
$this->assertSame('toolUse', $result->stopReason);
$this->assertSame('toolUse', $result->jsonSerialize()['stopReason']);
$this->assertSame(['traceId' => 'trace-1'], $result->jsonSerialize()['_meta']);
}
public function testProviderSpecificStopReasonIsPreserved(): void
{
$result = CreateSamplingMessageResult::fromArray([
'role' => 'assistant',
'content' => ['type' => 'text', 'text' => 'Done'],
'model' => 'test-model',
'stopReason' => 'provider-specific',
]);
$this->assertSame('provider-specific', $result->stopReason);
$this->assertSame('provider-specific', $result->jsonSerialize()['stopReason']);
}
}