@Test public void saveMissesProperty() throws RepositoryException {
  assumeTrue(!NodeImpl.SAVE_SESSION);
  try {
    prop1.setValue("changed");
    prop2.setValue("changed");
    prop1.save();
    fail("Expected UnsupportedRepositoryOperationException");
  }
 catch (  UnsupportedRepositoryOperationException e) {
    assertTrue(e.getCause() instanceof CommitFailedException);
  }
 finally {
    session.refresh(false);
  }
}