  @Test
  void basicReject() {

    when(envelope.getDeliveryTag()).thenReturn(43L);
    Envelope e = map.envelopeWithPseudoDeliveryTag(channel, envelope);
    assertNotEquals(43L, e.getDeliveryTag());
    assertDoesNotThrow(() -> map.basicReject(e.getDeliveryTag(), false));
    assertDoesNotThrow(() -> verify(channel).basicReject(43L, false));
  }