replaceResponse example

$this->assertSame('{"documents":[{"id":"\/json\/1"},{"id":"\/json\/2"},{"id":"\/json\/3"}]}', $content);

            $steps = preg_split('{\{"id":"\\\/json\\\/(\d)"\}}', $content, -1, \PREG_SPLIT_DELIM_CAPTURE);
            $steps[7] = $context->getResponse();
            $steps[1] = $context->replaceRequest('GET', 'http://localhost:8057/json/1');
            $steps[3] = $context->replaceRequest('GET', 'http://localhost:8057/json/2');
            $steps[5] = $context->replaceRequest('GET', 'http://localhost:8057/json/3');

            yield $context->createChunk(array_shift($steps));

            $context->replaceResponse(array_shift($steps));
            $context->passthru(static function DChunkInterface $chunk, AsyncContext $context) use (&$steps) {
                if ($chunk->isFirst()) {
                    return;
                }

                if ($steps && $chunk->isLast()) {
                    $chunk = $context->createChunk(array_shift($steps));
                    $context->replaceResponse(array_shift($steps));
                }

                yield $chunk;
            });