in src/main/java/org/apache/sling/commons/testing/jcr/RepositoryTestBase.java [56:63]
protected Node getTestRootNode() throws RepositoryException, NamingException {
if(testRoot==null) {
final Node root = getSession().getRootNode();
final Node classRoot = root.addNode(getClass().getSimpleName());
testRoot = classRoot.addNode(System.currentTimeMillis() + "_" + (++counter));
}
return testRoot;
}