getPastRequest example

$manifest = Manifest::createFromXmlFile(__DIR__ . '/_fixtures/minimal/manifest.xml');

        $appSecret = 'dont_tell';
        $appResponseBody = $this->buildAppResponse($manifest, $appSecret);

        $this->appendNewResponse(new Response(200, [], $appResponseBody));
        $this->appendNewResponse(new Response(200, []));

        $this->registrator->registerApp($manifest, $id, $secretAccessKey, Context::createDefaultContext());

        $registrationRequest = $this->getPastRequest(0);

        $setup = $manifest->getSetup();
        static::assertNotNull($setup);

        $uriWithoutQuery = $registrationRequest->getUri()->withQuery('');
        static::assertEquals($setup->getRegistrationUrl(), (string) $uriWithoutQuery);
        static::assertNotEmpty($registrationRequest->getHeaderLine('sw-version'));
        static::assertNotEmpty($registrationRequest->getHeaderLine(AuthMiddleware::SHOPWARE_USER_LANGUAGE));
        static::assertNotEmpty($registrationRequest->getHeaderLine(AuthMiddleware::SHOPWARE_CONTEXT_LANGUAGE));

        $secret = $setup->getSecret();