make Custom jackson module fails

[Djacke]

My system：

• springbootversion 2.0.1.RELEASE
• springCloudVersion Finchley.M9
• java 1.8
• org.springframework.boot:spring-boot-starter-webflux
• org.javamoney:moneta:1.2.1
• org.springframework.restdocs:spring-restdocs-webtestclient

custom SimpleModule

 @Bean
  public SimpleModule moneyModule() {
    return new MoneyModule();
  }

public MoneyModule() {
      addSerializer(Money.class, new MoneySerializer());
      addValueInstantiator(Money.class, new MoneyInstantiator());
  }

Integration test

@RunWith(SpringRunner.class)
@ActiveProfiles("integTest")
@SpringBootTest(webEnvironment = WebEnvironment.RANDOM_PORT)
public class XxxxHandlerTest{
    @Autowired
  WebTestClient webTestClient;

  @Rule
  public JUnitRestDocumentation restDocumentation = new JUnitRestDocumentation();

  @Autowired
  ApplicationContext context;

@Before
  public void init() throws Exception {
    this.webTestClient = WebTestClient.bindToApplicationContext(this.context)
        .configureClient()
        .baseUrl("http://local.com.cn")
        .filter(WebTestClientRestDocumentation
            .documentationConfiguration(this.restDocumentation)
            .operationPreprocessors()
            .withResponseDefaults(prettyPrint())
        )
        .build();
  }

 @Test
  public void testStoreVoucherEntry() {
    Operator mockUser = Operator.builder().name("张会计").id(ObjectId.get().toString()).build();
    List<AccountingEntry> accountingEntries = Arrays.asList(AccountingEntry.builder()
        .code("12121").summary("销售票据").debit(Money.of(100, "CNY"))
        .credit(Money.of(100, "CNY")).build());
    VoucherPost voucherPost = VoucherPost.builder().operator(mockUser)
        .accountingEntries(accountingEntries).build();
    webTestClient.post()
        .uri(mockUrl)
        .body(BodyInserters.fromObject(voucherPost))
        .exchange().expectStatus().isOk();
}

The above code test error :

org.springframework.core.codec.DecodingException: JSON decoding error: Cannot construct instance of `org.javamoney.moneta.Money` (although at least one Creator exists): cannot deserialize from Object value (no delegate- or property-based Creator); nested exception is com.fasterxml.jackson.databind.exc.MismatchedInputException: Cannot construct instance of `org.javamoney.moneta.Money` (although at least one Creator exists): cannot deserialize from Object value (no delegate- or property-based Creator)

When I remove the following code，test code is working properly

 this.webTestClient = WebTestClient.bindToApplicationContext(this.context)
        .configureClient()
        .baseUrl("http://local.com.cn")
        .filter(WebTestClientRestDocumentation
            .documentationConfiguration(this.restDocumentation)
            .operationPreprocessors()
            .withResponseDefaults(prettyPrint())
        )
        .build();

I guess the webtestclient's configuration has caused it to ignore the custom jackson module, so I would like to know how to solve this problem. Maybe there is no problem at all, but my configuration is wrong. Please give me some advice. Thank you.

[Djacke]

I am sorry, I should go to StackOverflow

[wilkinsona]

Yeah, Stack Overflow is the best place for a question like this. If you ask one, could you comment here with a link to it, please? That was anyone finding this issue can follow the trail.