@Test public void testSaveGrandchild() { Parent parent = new Parent(); yawp.save(parent); Child child = new Child(); child.setParentId(parent.getId()); yawp.save(child); Grandchild grandchild = new Grandchild("xpto"); grandchild.setChildId(child.getId()); yawp.save(grandchild); Child retrievedChild = child.getId().fetch(); Grandchild retrievedGrandchild = grandchild.getId().fetch(); assertEquals(retrievedGrandchild.getChildId(), retrievedChild.getId()); assertEquals("xpto", retrievedGrandchild.getName()); }