@Test
public void globalTxIsNotSet() throws Throwable {

  omegaContext.setGlobalTxId(null);
  try {
    aspect.advise(joinPoint, compensable);
    fail("Expect exception here");
  } catch (OmegaException ex) {
    assertThat(ex.getMessage(), is("Cannot find the globalTxId from OmegaContext. Please using @SagaStart to start a global transaction."));
  }
}