### Question:
LoopbackChannel extends FilteredBase implements LogSource { public String getRealm () { return realm; } LoopbackChannel(); void setPackager(ISOPackager packager); void connect(); void disconnect(); void reconnect(); boolean isConnected(); void send(ISOMsg m); void send(byte[] b); ISOMsg receive(); void setUsable(boolean usable); int[] getCounters(); void setName(String name); String getName(); ISOPackager getPackager(); void resetCounters(); void setLogger(Logger logger, String realm); String getRealm(); Logger getLogger();  }### Answer:
@Test public void testGetRealm() throws Throwable { LoopbackChannel loopbackChannel = new LoopbackChannel(); loopbackChannel.setLogger(new Logger(), "testLoopbackChannelRealm"); String result = loopbackChannel.getRealm(); assertEquals("testLoopbackChannelRealm", result, "result"); }
@Test public void testGetRealm1() throws Throwable { String result = new LoopbackChannel().getRealm(); assertNull(result, "result"); }