Timeouts return Http "ok" (200) response

[amygithub]

Set a global or a per-route timeout. Create a test that delays the response from the stubbed downstream service in order to trigger a timeout. This will log a ResponseStatusException with a message containing "504 GATEWAY_TIMEOUT". However, the resultant response from the spring-cloud-gateway service has a status of 200. Ideally, it should have a status of 504.

Spring-cloud-gateway version: "2021.0.3"

In the config:

  cloud:
    gateway:
      httpclient:
        connect-timeout: 3000
        response-timeout: 15s

In the test:

@ActiveProfiles("test")
@AutoConfigureWireMock(port = WIRE_MOCK_PORT)
@SpringBootTest(webEnvironment = RANDOM_PORT, classes = {PortalGatewayApplication.class})
@AutoConfigureWebTestClient(timeout = "20000")
public class AdvertsIntegrationTest {

    @Test
    public void shouldProxyRequestsToAdvertsService() {

        stubFor(get(urlEqualTo("/api/")).withHost(equalTo("localhost")).withPort(WIRE_MOCK_PORT)
                .withHeader("someHeader", equalTo("someHeaderValue"))
                .willReturn(status(ok())
                    .withFixedDelay(50000))
        );

        webClient.get().uri("/advert/")
                .exchange()
                .expectStatus().isOk(); // This passes, although ideally the status wouldn't be "ok".
    }
}