public void testRemoveItemRhs() {
final RuleModel model = new RuleModel();
model.rhs = new IAction[3];
final ActionRetractFact r0 = new ActionRetractFact( "x" );
final ActionRetractFact r1 = new ActionRetractFact( "y" );
final ActionRetractFact r2 = new ActionRetractFact( "z" );
model.rhs[0] = r0;
model.rhs[1] = r1;
model.rhs[2] = r2;