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java.lang.NullPointerException at org.jivesoftware.smack.SASLAuthentication.send(SASLAuthentication.java:401) at org.jivesoftware.smack.sasl.SASLMechanism.authenticate(SASLMechanism.java:68) at org.jivesoftware.smack.SASLAuthentication.authenticate(SASLAuthentication.java:190) at org.jivesoftware.smack.XMPPConnection.login(XMPPConnection.java:410) at org.jivesoftware.smack.XMPPConnection.login(XMPPConnection.java:374) at org.jivesoftware.smack.RosterTest.testRosterPresences(RosterTest.java:454) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:585) at junit.framework.TestCase.runTest(TestCase.java:154) at junit.framework.TestCase.runBare(TestCase.java:127) at junit.framework.TestResult$1.protect(TestResult.java:106) at junit.framework.TestResult.runProtected(TestResult.java:124) at junit.framework.TestResult.run(TestResult.java:109) at junit.framework.TestCase.run(TestCase.java:118) at junit.framework.TestSuite.runTest(TestSuite.java:208) at junit.framework.TestSuite.run(TestSuite.java:203) at org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.run(JUnitTestRunner.java:289) at org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.launch(JUnitTestRunner.java:656) at org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.main(JUnitTestRunner.java:558)