%description:
Tests cMessage.addLength().

%activity:
cMessage msg("msg");

ev << msg.length() << endl;

msg.addLength(100);
ev << msg.length() << endl;

msg.addLength(50);
ev << msg.length() << endl;

msg.addLength(-10);
ev << msg.length() << endl;

msg.addLength(-300);
ev << msg.length() << endl;

%exitcode: 1

%contains-regex: stdout
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<!> Error .*length became negative