public void testCallManagerIndexer()
{
Assert.AreEqual(0, _manager.Count);
// create a call instance
IStateMachine sm = _manager.createOutboundCall("1234");
Assert.AreEqual(1, _manager.Count);
// check if index match
Assert.AreEqual(sm, _manager[sm.Session]);
// destroy call instance
_manager.DestroySession(sm.Session);
Assert.AreEqual(0, _manager.Count);
// check nonexisting index (NullStateMachine expected
Assert.AreEqual(-1, _manager[1].Session);
Assert.AreEqual(EStateId.NULL, _manager[1].StateId);
// Many call instances
IStateMachine sm1 = _manager.createOutboundCall("1234");
IStateMachine sm2 = this.makeIncomingCall(2);
// check if index match
Assert.AreEqual(sm1, _manager[sm1.Session]);
Assert.AreEqual(sm2, _manager[sm2.Session]);
// destroy calls
_manager.DestroySession(sm1.Session);
_manager.DestroySession(sm2.Session);
}