@Test
public void testJsonObjects() throws IOException {

    ObjectNode actual1 = DXJSON.getObjectBuilder().build();
    ObjectNode expected1 = new MappingJsonFactory().createParser("{}").readValueAsTree();
    Assert.assertEquals(expected1, actual1);
    Assert.assertEquals(expected1.toString(), "{}");
    ObjectNode actual2 = DXJSON.getObjectBuilder().put("key1", "a-string").put("key2", 12321).build();
    ObjectNode expected2 = new MappingJsonFactory().createParser("{\"key1\": \"a-string\", \"key2\": 12321}")
            .readValueAsTree();
    Assert.assertEquals(expected2, actual2);
}