cmp.ignoredAttributes.add("bgcolor");
ensureFail("The \"cellpading\" attribute should not be ignored anymore.", cmp);
// Ignore the table node, which contains the faulty attribute.
cmp.ignoredNodes.add("table");
cmp.compare();
// Ignore the form node and all its children.
cmp.ignoredNodes.clear();
cmp.ignoredNodes.add("form");
cmp.compare();