@Test
public void should_return_tracing_by_tracing_id() {

    long tracingId = 1L;
    Tracing tracing = mock(Tracing.class);
    when(tracingDao.getTracingById(tracingId)).thenReturn(tracing);
    assertThat(tracingService.getById(tracingId), is(tracing));
    verify(tracingDao, times(1)).getTracingById(tracingId);
}