%description:
Test the const version of the check_and_cast<T>() function.

%activity:

// create a cPacket as cMessage
const cOwnedObject *msg = new cMessage();

// this should succeed
const cMessage *p1 = check_and_cast<const cMessage *>(msg);
EV << "p1:" << (p1!=nullptr) << endl;

// and this one not
const cQueue *p2 = check_and_cast<const cQueue *>(msg);
(void)p2;
EV << "fell through" << endl;

%exitcode: 1

%contains: stdout
p1:1

%contains: stderr
Cannot cast

%not-contains: stdout
fell through