assertEquals(1, deserializer.getDeserializationMixins().size());
//Test roundTrip
FruitCollection fc = JsonBeanRoundTripTestCase.JSON_OBJECT;
String result = (String)serializer.transform(fc);
assertNotNull(result);
// compare the structure and values but not the attributes' order
ObjectMapper mapper = new ObjectMapper();
JsonNode actualJsonNode = mapper.readTree(result);
JsonNode expectedJsonNode = mapper.readTree(JsonBeanRoundTripTestCase.JSON_STRING);