@Test
public void testThatPrintingDoesntThrowExceptions() {
pm.currentTransaction().commit();
pm.currentTransaction().begin();
ZooClassDef def = getDef(TestClass.class);
QueryParser qp = new QueryParser("(_int > 1 && _int < 52) || _int > 50", def, null, null);
QueryTreeNode qtn = qp.parseQuery();
assertNotNull(qtn.print());
}