@Test
  public void testGetParentDocuments() {

    setPermissionToAnonymous(EVERYTHING);

    DocumentModel root = session.getRootDocument();

    String name = "Workspaces#1";
    DocumentModel workspaces = new DocumentModelImpl(root.getPathAsString(), name, "Workspace");
    session.createDocument(workspaces);
    String name2 = "repositoryWorkspace2#";
    DocumentModel repositoryWorkspace =
        new DocumentModelImpl(workspaces.getPathAsString(), name2, "Workspace");
    repositoryWorkspace = session.createDocument(repositoryWorkspace);

    String name3 = "ws#3";
    DocumentModel ws1 =
        new DocumentModelImpl(repositoryWorkspace.getPathAsString(), name3, "Workspace");
    ws1 = session.createDocument(ws1);
    String name4 = "ws#4";
    DocumentModel ws2 = new DocumentModelImpl(ws1.getPathAsString(), name4, "Workspace");
    session.createDocument(ws2);

    if (session.isNegativeAclAllowed()) { // always false for Mem
      ACP acp = new ACPImpl();
      ACE denyRead = new ACE("test", READ, false);
      ACL acl = new ACLImpl();
      acl.setACEs(new ACE[] {denyRead});
      acp.addACL(acl);
      // TODO this produces a stack trace
      repositoryWorkspace.setACP(acp, true);
      ws1.setACP(acp, true);
    }

    session.save();

    List<DocumentModel> ws2ParentsUnderAdministrator = session.getParentDocuments(ws2.getRef());
    assertTrue(
        "list parents for"
            + ws2.getName()
            + "under "
            + session.getPrincipal().getName()
            + " is not empty:",
        !ws2ParentsUnderAdministrator.isEmpty());

    CoreSession testSession = openSessionAs("test");
    List<DocumentModel> ws2ParentsUnderTest = testSession.getParentDocuments(ws2.getRef());
    assertTrue(
        "list parents for"
            + ws2.getName()
            + "under "
            + testSession.getPrincipal().getName()
            + " is empty:",
        ws2ParentsUnderTest.isEmpty());
    closeSession(testSession);
  }