How to use

testConnection

method

in

com.notnoop.apns.ApnsService

 final InputStream certificate = Thread.currentThread().getContextClassLoader()
    .getResourceAsStream("aps_dev_credentials.p12");
final char[] passwd = {'1','2','3','4'};
final ApnsService apnsService = com.notnoop.apns.APNS.newService()
    .withCert(certificate, new String(passwd))
    .withSandboxDestination().build();
apnsService.testConnection();

public void testConnection() throws NetworkIOException {
  service.testConnection();
}