ConfigurationFileManager { public InputStream downloadStoredConfiguration() { return configurationProvider.getStorage().load(); } ConfigurationFileManager();   ConfigurationFileManager(final ConfigurationProvider configurationProvider, final File rootDirectory); void initConfiguration(); void restoreConfiguration(); void unzipFilesFrom(final FileItem file); void deleteFile(final String path); void saveConfiguration(final String includes, final String excludes); InputStream downloadStoredConfiguration(); File getRootDirectory();  }
@Test public void testDownloadFromFileStorage() { final ConfigurationFileManager subject = getTestJenkinsConfiguration(); assertNotNull(subject.downloadStoredConfiguration()); }