### Question:
FeedsTools { public static boolean isFeedValid(String url, String username, String password) { final ConnectionsManager manager = new ConnectionsManager(1); Connection connection = null; try { final ConnectionConfiguration configuration = new ConnectionConfiguration(url); if ((username != null) && (password != null)) { configuration.addCredentials(username, password); } connection = manager.openConnection(configuration); final InputStream theInputStream = connection.getInputStream(); new SyndFeedInput().build(new XmlReader(theInputStream)); return true; } catch (final Exception e) { } finally { if (connection != null) { connection.close(); } manager.shutdown(); } return false; }  static String extractEnclosureUrl(SyndEntry entry); static boolean isFeedValid(String url, String username, String password); static TtsLangData extractFeedLanguage(String url); static Set<VAction> getUsedFullActionByType(int type);  }### Answer:
@Test public void isFeedValidTest() { Assert.assertFalse(FeedsTools.isFeedValid("http: Assert.assertFalse(FeedsTools.isFeedValid("https: Assert.assertTrue(FeedsTools.isFeedValid("https: Assert.assertTrue(FeedsTools.isFeedValid("http: }