@Test public void findByMeterReadingId_returnsIntervalBlocks() { MeterReading meterReading = new MeterReading(); meterReading.setUUID(UUID.randomUUID()); IntervalBlock intervalBlock = new IntervalBlock(); intervalBlock.setUUID(UUID.randomUUID()); IntervalBlock intervalBlock1 = new IntervalBlock(); intervalBlock1.setUUID(UUID.randomUUID()); meterReading.addIntervalBlock(intervalBlock); meterReading.addIntervalBlock(intervalBlock1); meterReadingRepository.persist(meterReading); assertEquals(2, repository.findAllByMeterReadingId(meterReading.getId()).size()); }