public void testSetPrincipalSubjectStack()
{
SecurityAssociation.clear();
SecurityAssociation.setServer();
SubjectContext subjectContext = SecurityAssociation.peekSubjectContext();
assertTrue("SubjectContext is null", subjectContext == null);
//Direct Usage of setPrincipal on the server side will increase subject ctx
SecurityAssociation.setPrincipal(null);
subjectContext = SecurityAssociation.peekSubjectContext();