java - @RestClientTest request not being executeddetected - Stack Overflow

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I have a service that calls a third-party API with RestClient using a default config, when trying to test it using @RestClientTest the mock server does not detect any incoming requests, I am not sure if its because the RestClient is not being injected correctly or because of the Async behaviour.

How could I test it correctly? Below is the error and the a similar code to what i have

java.lang.AssertionError: 
No further requests expected: HTTP GET 
0 request(s) executed

@Service
public class MyService {
    private final Logger logger = LoggerFactory.getLogger(this.getClass());

    @Autowired
    RestClient restClient;

        @Autowired MyRepository

    @Async
    public CompletableFuture<Void> fetch(Entity e) {

            List<MyDto> info = restClient
                    .get()
                    .uri("/get-info" + e.getId())
                    .attributes(clientRegistrationId("oauth2-client"))
                    .retrieve()
                    .body(new ParameterizedTypeReference<List<MyDto>>() {});

            repository.saveAll(info);

        return CompletableFuturepletedFuture(null);
    }
}

@RestClientTest({MyService.class})
@Import({ServiceTest.TestConfig.class})
class MyServiceTest {

    @TestConfiguration
    static class TestConfig {

        @Bean
        ClientRegistrationRepository clientRegistrationRepository() {
            return new InMemoryClientRegistrationRepository(ClientRegistration.withRegistrationId("oauth2-client")
                    .authorizationGrantType(AuthorizationGrantType.CLIENT_CREDENTIALS)
                    .clientId("test")
                    .tokenUri("test")
                    .build());
        }

        @Bean
        OAuth2AuthorizedClientService auth2AuthorizedClientService(
                ClientRegistrationRepository clientRegistrationRepository) {
            return new InMemoryOAuth2AuthorizedClientService(clientRegistrationRepository);
        }

        @Bean
        public Executor asyncTaskExecutor() {
            return new SyncTaskExecutor();
        }

                @Bean
                public RestClient restClient(RestClient.Builder restClientBuilder) {
                    return restClientBuilder 
                            .baseUrl(";)
                            .defaultHeader("X-API-KEY", "test-api-key")
                            .build();
                }
    }

    MockRestServiceServer server;

        @MockBean
        MyRepository myRepository;

    @Autowired
    private Service service;

        @Autowired
        RestClient.Builder restClientBuilder;

    @BeforeEach
    void setUp() {
        server = MockRestServiceServer.bindTo(restClientBuilder).build();
    }

    @Test
    void testFetch() {
        Entity e = new Entity();
        Entity.setId(1L);


        server.expect(requestTo(";))
                .andRespond(
                        withSuccess().contentType(MediaType.APPLICATION_JSON));

        service.fetchWorkload(e).join();

        server.verify();
    }

@Configuration
public class RestClientConfig {

    @Value("api.key")
    private String apiKey;

    @Bean
    public OAuth2AuthorizedClientManager authorizedClientManager(
            ClientRegistrationRepository clientRegistrationRepository,
            OAuth2AuthorizedClientService authorizedClientService) {

        AuthorizedClientServiceOAuth2AuthorizedClientManager authorizedClientManager =
                new AuthorizedClientServiceOAuth2AuthorizedClientManager(
                        clientRegistrationRepository, authorizedClientService);

        authorizedClientManager.setAuthorizedClientProvider(OAuth2AuthorizedClientProviderBuilder.builder()
                .authorizationCode()
                .build());

        return authorizedClientManager;
    }

    @Bean
    public RestClient restClient(OAuth2AuthorizedClientManager authorizedClientManager) {
        return RestClient.builder()
                .baseUrl(";)
                .defaultHeader(HttpHeaders.CONTENT_TYPE, MediaType.APPLICATION_JSON_VALUE)
                .defaultHeader(HttpHeaders.ACCEPT, MediaType.APPLICATION_JSON_VALUE)
                .defaultHeader("X-API-KEY", apiKey)
                .requestInterceptor(new OAuth2ClientHttpRequestInterceptor(authorizedClientManager))
                .build();
    }
}

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