Index: src/test/java/org/apache/harmony/luni/tests/java/net/InetAddressTest.java =================================================================== --- src/test/java/org/apache/harmony/luni/tests/java/net/InetAddressTest.java (revision 490122) +++ src/test/java/org/apache/harmony/luni/tests/java/net/InetAddressTest.java (working copy) @@ -486,6 +486,21 @@ ia = Inet4Address.getByName("1.1.1.1"); assertFalse(ia.isReachable(1000)); assertFalse(ia.isReachable(null, 0, 1000)); + + // Regression test for HARMONY-1842. + ia = InetAddress.getByName("localhost"); + Enumeration nif = NetworkInterface.getNetworkInterfaces(); + Object e = null; + NetworkInterface netif = null; + + for (; nif.hasMoreElements(); ) { + e = nif.nextElement(); + + if (e != null) { + netif = (NetworkInterface)e; + } + ia.isReachable(netif, 10, 1000); + } } // comparator for InetAddress objects