@Test
public void should_fail_when_response_missing_231_continue() throws CoapException {

    givenPutRequest(1500);
    //when
    receive(coap().block1Req(0, S_512, false).ack(C400_BAD_REQUEST));
    //then
    assertNothingSent();
    verify(callback).call(coap().block1Req(0, S_512, false).ack(C400_BAD_REQUEST).build());
}