### Question:
DataSourceRepositoryHolder { public boolean isInitialized() { return initialized; } private  DataSourceRepositoryHolder(); static DataSourceRepositoryHolder getInstance(); void init(DataSourceInformationRepository repository, Properties properties); DataSourceInformationRepository getDataSourceInformationRepository(); boolean isInitialized(); DataSourceRepositoryManager getDataSourceRepositoryManager(); RepositoryBasedDataSourceFinder getRepositoryBasedDataSourceFinder();  }### Answer:
@Test public void testIsInitialized() { Assert.assertTrue("must return true since already initialized", repositoryHolder.isInitialized()); }