@Test
public void tryToDetermineActorNameWithMissingCorrelationId() {

    final DittoHeaders dittoHeaders = DittoHeaders.newBuilder()
            .acknowledgementRequest(AcknowledgementRequest.of(AcknowledgementLabel.of("my-requested-ack")))
            .build();
    assertThatExceptionOfType(AcknowledgementCorrelationIdMissingException.class)
            .isThrownBy(() -> AcknowledgementForwarderActor.determineActorName(dittoHeaders));
}