@Configuration
public class RestTemplateConfiguration {

    @Bean
    @DependsOn(value = {"secureRestTemplateCustomizer"})
    @Qualifier("secureRestTemplateBuilder")
    public RestTemplateBuilder secureRestTemplateBuilder() {
        return new RestTemplateBuilder(secureRestTemplateCustomizer());
    }

    @Bean
    @DependsOn(value = {"publicRestTemplateCustomizer"})
    @Qualifier("publicRestTemplateBuilder")
    public RestTemplateBuilder publicRestTemplateBuilder() {
        return new RestTemplateBuilder(publicRestTemplateCustomizer());
    }

    @Bean
    @Qualifier("secureRestTemplateCustomizer")
    public SecureRestTemplateCustomizer secureRestTemplateCustomizer() {
        return new SecureRestTemplateCustomizer();
    }

    @Bean
    @Qualifier("publicRestTemplateCustomizer")
    public PublicRestTemplateCustomizer publicRestTemplateCustomizer() {
        return new PublicRestTemplateCustomizer();
    }
}

@Component
public class SecureRestTemplateCustomizer implements RestTemplateCustomizer {
    @Override
    public void customize(RestTemplate restTemplate) {
        restTemplate.setErrorHandler(new ErrorHandler());
        restTemplate.getInterceptors().add(new AuthorizationHeaderInterceptor());
    }
}

@Component
public class PublicRestTemplateCustomizer implements RestTemplateCustomizer {
  @Override
  public void customize(RestTemplate restTemplate) {
    restTemplate.setErrorHandler(new ErrorHandler());
  }
}

private RestTemplate restTemplate;
  @Autowired
  public LoginApiClient(@Qualifier("publicRestTemplateBuilder") RestTemplateBuilder restTemplateBuilder) {
    this.restTemplate = restTemplateBuilder.build();
  }

@RunWith(SpringRunner.class)
@RestClientTest({LoginApiClient.class})
@Category(IUnitTest.class)
public class LoginApiClientTest {

  @Autowired ILoginApiClient loginApiClient;

  @Autowired private MockRestServiceServer server;

  @Test
  public void validateToken_returns_true_for_valid_token() throws Exception{
    String token = "token";

    this.server.expect(requestTo(this.validateTokenUrl))
               .andExpect(method(HttpMethod.POST))
               .andRespond(withSuccess(objectMapper.writeValueAsString(validTokenResponse(token)), MediaType
                       .APPLICATION_JSON));

    Boolean isValid = loginApiClient.validateToken(token);

    server.verify();
    assertThat(isValid,is(equalTo(true)));
  }

}