junit.framework.AssertionFailedError: mac was: null
	at junit.framework.Assert.fail(Assert.java:47)
	at junit.framework.Assert.assertTrue(Assert.java:20)
	at de.javastream.java.net.MacCacheTest.testApp(MacCacheTest.java:61)

Standard Output

@HL
@HL-------------------------------------------------------
@HL T E S T S
@HL-------------------------------------------------------
@SLRunning de.javastream.java.net.MacCacheTest
Mac for ip 10.10.0.107 is null

Standard Error

Jan 25, 2014 4:42:44 PM de.javastream.java.net.jmac.MacCache getMacFromAddress
WARNING: Cannot run program "arp": error=2, Datei oder Verzeichnis nicht gefunden