### Question:
DefaultConfigurationAccessor implements ConfigurationAccessor { @Override public void deleteJob(UUID jobId) throws AlertDatabaseConstraintException { if (jobId == null) { throw new AlertDatabaseConstraintException(NULL_JOB_ID); } List<Long> configIdsForJob = configGroupRepository .findByJobId(jobId) .stream() .map(ConfigGroupEntity::getConfigId) .collect(Collectors.toList()); for (Long configId : configIdsForJob) { deleteConfiguration(configId); } } @Autowired  DefaultConfigurationAccessor(RegisteredDescriptorRepository registeredDescriptorRepository, DescriptorTypeRepository descriptorTypeRepository, DefinedFieldRepository definedFieldRepository,
        DescriptorConfigRepository descriptorConfigsRepository, ConfigGroupRepository configGroupRepository, ConfigContextRepository configContextRepository, FieldValueRepository fieldValueRepository,
        EncryptionUtility encryptionUtility); @Override List<ConfigurationJobModel> getAllJobs(); @Override Optional<ConfigurationJobModel> getJobById(UUID jobId); @Override List<ConfigurationJobModel> getJobsByFrequency(FrequencyType frequency); @Override ConfigurationJobModel createJob(Collection<String> descriptorNames, Collection<ConfigurationFieldModel> configuredFields); @Override ConfigurationJobModel updateJob(UUID jobId, Collection<String> descriptorNames, Collection<ConfigurationFieldModel> configuredFields); @Override void deleteJob(UUID jobId); @Override Optional<ConfigurationModel> getProviderConfigurationByName(String providerConfigName); @Override Optional<ConfigurationModel> getConfigurationById(Long id); @Override List<ConfigurationModel> getConfigurationsByDescriptorKey(DescriptorKey descriptorKey); @Override List<ConfigurationModel> getConfigurationsByDescriptorType(DescriptorType descriptorType); @Override List<ConfigurationModel> getChannelConfigurationsByFrequency(FrequencyType frequencyType); @Override List<ConfigurationModel> getConfigurationsByDescriptorKeyAndContext(DescriptorKey descriptorKey, ConfigContextEnum context); @Override ConfigurationModel createConfiguration(DescriptorKey descriptorKey, ConfigContextEnum context, Collection<ConfigurationFieldModel> configuredFields); @Override List<ConfigurationModel> getConfigurationsByDescriptorNameAndContext(String descriptorName, ConfigContextEnum context); @Override ConfigurationModel updateConfiguration(Long descriptorConfigId, Collection<ConfigurationFieldModel> configuredFields); @Override void deleteConfiguration(ConfigurationModel configModel); @Override void deleteConfiguration(Long descriptorConfigId); static final String EXCEPTION_FORMAT_DESCRIPTOR_KEY_IS_NOT_VALID; }### Answer:
@Test public void deleteJobNullIdTest() throws Exception { DefaultConfigurationAccessor configurationAccessor = new DefaultConfigurationAccessor(null, null, null, null, null, null, null, null); try { configurationAccessor.deleteJob(null); fail("Null jobId did not throw expected AlertDatabaseConstraintException."); } catch (AlertDatabaseConstraintException e) { assertNotNull(e); } }