### Question:
MedicineManagementImpl implements MedicineManagementService { @Override public CommonResult deleteMedicineById(Short id) { if (medicineMapper.get(id) == null) { return CommonResult.fail(E_602); } int count = medicineMapper.delete(id); if (count == 0) { return CommonResult.fail(); } return CommonResult.success(count); }  @Override CommonResult getMedicineById(Short id); @Override CommonResult insertMedicine(Medicine medicine); @Override CommonResult updateMedicineById(Medicine medicine); @Override CommonResult deleteMedicineById(Short id); @Override CommonResult listAllMedicines(); @Override CommonResult listMedicineByType(Integer type);  }### Answer:
@Test public void testDeleteMedicineById() throws Exception { }