parentage is correct
ok(!defined($clone->getParent()), '... the clones parent is not defined');
isnt($clone, $btree, '... these should be refs');
is($clone->getLeft()->getNodeValue(), $btree->getLe
)->getLeft()->getNodeValue()), "SCALAR", '... these should be scalar refs');
# but different ones
isnt($clone->getLeft()->getLeft()->getNodeValue(), $btree->getLeft()->getLeft()->getNodeValue(),
'...
ee->getRight()->getNodeValue()), "ARRAY", '... these should be array refs');
# but different ones
isnt($clone->getRight()->getNodeValue(), $btree->getRight()->getNodeValue(),
'... these should be dif