### Question:
DatabaseServerConfigService extends AbstractArchivistService<DatabaseServerConfig> implements ResourceBasedCrnProvider { public DatabaseServerConfig deleteByCrn(String crn) { DatabaseServerConfig resource = getByCrn(crn); if (resource.getResourceStatus() == ResourceStatus.SERVICE_MANAGED) { throw new IllegalStateException("deleteByCrn called with service-managed server. This indicates an error in redbeams code"); } return delete(resource); }  Set<DatabaseServerConfig> findAll(Long workspaceId, String environmentCrn); DatabaseServerConfig create(DatabaseServerConfig resource, Long workspaceId, boolean test); DatabaseServerConfig update(DatabaseServerConfig resource); DatabaseServerConfig release(String resourceCrn); @Override DatabaseServerConfig delete(DatabaseServerConfig resource); DatabaseServerConfig getByName(Long workspaceId, String environmentCrn, String name); DatabaseServerConfig getByCrn(String resourceCrn); Optional<DatabaseServerConfig> getByCrn(Crn resourceCrn); Optional<DatabaseServerConfig> getByClusterCrn(String clusterCrn); DatabaseServerConfig deleteByCrn(String crn); @Override JpaRepository repository(); Set<DatabaseServerConfig> getByCrns(Set<String> crns); String testConnection(String crn); String testConnection(DatabaseServerConfig resource); String createDatabaseOnServer(String serverCrn, String databaseName, String databaseType, Optional<String> databaseDescription); @Override AuthorizationResourceType getResourceType(); @Override String getResourceCrnByResourceName(String resourceName); @Override List<String> getResourceCrnListByResourceNameList(List<String> resourceNames); @Override List<String> getResourceCrnsInAccount();  }### Answer:
@Test public void testDeleteByCrnNotFound() { thrown.expect(NotFoundException.class); when(repository.findByResourceCrn(SERVER_CRN)).thenReturn(Optional.empty()); underTest.deleteByCrn(server.getResourceCrn().toString()); }