@Test public void testQualifyOnToOne(){
  ReflexiveAndToOne ox=context.newObject(ReflexiveAndToOne.class);
  ox.setName("ox");
  ReflexiveAndToOne o1=context.newObject(ReflexiveAndToOne.class);
  o1.setName("o1");
  ReflexiveAndToOne o2=context.newObject(ReflexiveAndToOne.class);
  o2.setName("o2");
  o2.setToParent(o1);
  context.commitChanges();
  Expression qualifier=ExpressionFactory.matchExp("toParent",o1);
  List children=context.performQuery(new SelectQuery(ReflexiveAndToOne.class,qualifier));
  assertEquals(1,children.size());
  assertSame(o2,children.get(0));
}