### Question:
BranchApiImpl implements BranchApi { @Override public Set<String> getValidators(String branchId) { BlockChain bc = branchGroup.getBranch(BranchId.of(branchId)); ValidatorSet validators = bc.getValidators(); if (validators == null) { throw new NonExistObjectException.TxNotFound(); } return validators.getValidatorMap().keySet(); } @Autowired  BranchApiImpl(BranchGroup branchGroup); @Override Map<String, BranchDto> getBranches(); @Override Set<String> getValidators(String branchId);  }### Answer:
@Test public void getValidatorsTest() { try { assertThat(BRANCH_API.getValidators(branchId)).isNotNull(); } catch (Exception exception) { log.debug("getValidatorsTest :: exception : " + exception); } }