%description:
test cQueueIterator with empty queue
test iter++, iter-- and iter() behaves good after reaching end()

%activity:

#define CHECK(cond)  if (!(cond)) {throw new cException("BUG at line %d, failed condition %s", __LINE__, #cond);}

cQueue q("queue");

cQueueIterator iter(q);
CHECK(iter.end());
CHECK(iter()==NULL);

iter++;
CHECK(iter.end());
CHECK(iter()==NULL);

iter++;
CHECK(iter.end());
CHECK(iter()==NULL);

iter--;
CHECK(iter.end());
CHECK(iter()==NULL);

iter--;
CHECK(iter.end());
CHECK(iter()==NULL);

// now with athead==false
cQueueIterator iter2(q,false);
CHECK(iter2.end());
CHECK(iter2()==NULL);

iter2++;
CHECK(iter2.end());
CHECK(iter2()==NULL);

iter2--;
CHECK(iter2.end());
CHECK(iter2()==NULL);

ev << "OK!\n";

%contains: stdout
OK!

%not-contains: stdout
BUG