ContentLengthTest.php

<?php

declare (strict_types=1);
namespace Drupal\Tests\big_pipe\Unit\StackMiddleware;

use Drupal\big_pipe\Render\BigPipeResponse;
use Drupal\big_pipe\StackMiddleware\ContentLength;
use Drupal\Core\Render\HtmlResponse;
use Drupal\Tests\UnitTestCase;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\HttpKernel\HttpKernelInterface;

/**
 * Defines a test for ContentLength middleware.
 *
 * @group big_pipe
 * @coversDefaultClass \Drupal\big_pipe\StackMiddleware\ContentLength
 */
final class ContentLengthTest extends UnitTestCase {
    
    /**
     * @covers ::handle
     * @dataProvider providerTestSetContentLengthHeader
     */
    public function testHandle(false|int $expected_header, Response $response) : void {
        $kernel = $this->prophesize(HttpKernelInterface::class);
        $request = Request::create('/');
        $kernel->handle($request, HttpKernelInterface::MAIN_REQUEST, TRUE)
            ->willReturn($response);
        $middleware = new ContentLength($kernel->reveal());
        $response = $middleware->handle($request);
        if ($expected_header === FALSE) {
            $this->assertFalse($response->headers
                ->has('Content-Length'));
            return;
        }
        $this->assertSame((string) $expected_header, $response->headers
            ->get('Content-Length'));
    }
    public static function providerTestSetContentLengthHeader() {
        $response = new Response('Test content', 200);
        $response->headers
            ->set('Content-Length', (string) strlen('Test content'));
        return [
            '200 ok' => [
                12,
                $response,
            ],
            'Big pipe' => [
                FALSE,
                new BigPipeResponse(new HtmlResponse('Test content')),
            ],
        ];
    }

}