ObjectNode equality? jackson 2.2.2

gistfile1.java

    @Test
    public void testObjectNodesWithKeysInDifferentOrder() {
        ObjectNode a = JsonNodeFactory.instance.objectNode();
        a.put("foo",1);
        a.put("bar",2);

        ObjectNode b = JsonNodeFactory.instance.objectNode();
        b.put("bar",2);
        b.put("foo",1);

        assertEquals(a,b);  //This fails
    }