public function responseIsSuccessfullyWithContainScalarResult($result)
    {
        Assertions::assertEquals(200, $this->response->getStatusCode(), sprintf(
            'Response with error "%s"',
            $this->response->getBody()
        ));

        Assertions::assertTrue(is_null($this->response->getRpcErrorCode()), sprintf(
            'Response with error "%s"',
            $this->response->getBody()
        ));

        Assertions::assertEquals($result, $this->response->getRpcResult(), sprintf(
            'Result must be a contain "%s"',
            $result
        ));
    }