assertNodeExists("/tmp/a");
assertNodeExists("/tmp/b");
// uninstall
opts.setNonRecursive(false);
pack.uninstall(opts);
assertNodeMissing("/etc/packages/my_packages/sub_a.zip");
assertNodeMissing("/etc/packages/my_packages/sub_b.zip");
assertNodeMissing("/tmp/a");
assertNodeMissing("/tmp/b");