### Question:
BaseConfigurationFactory implements ConfigurationFactory { public static BaseConfigurationFactory getInstance() { return instance; } BaseConfigurationFactory();   BaseConfigurationFactory(File serversConfigDirectory); static BaseConfigurationFactory getInstance(); @Override Configuration initConfiguration(String configDirectory, String serverName, String userName, Map<String, String> additionalProperties);  }### Answer:
@Test public void testGetInstance() { assertSame(BaseConfigurationFactory.getInstance(), BaseConfigurationFactory.getInstance()); }