How to specify a specfic port number for Spring WebTestClient

Question

I have a locally running rest endpoint I am attempting to communicate with using Spring WebClient. As a first step for testing purposes, I am trying to use Spring WebTestClient. My local rest endpoint runs on a specific port (lets say 8068). My assumption is that since the port is fixed, I am supposed to use:

SpringBootTest.WebEnvironment.DEFINED_PORT

, and then somehow specify what that port is in my code. However I do not know how to do that. It would appear to default to 8080. Here are the important parts of my code:

@RunWith(SpringRunner.class)
@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.DEFINED_PORT)
@FixMethodOrder(MethodSorters.NAME_ASCENDING)
public class SpringWebclientApplicationTests {

@Autowired
private WebTestClient webTestClient;

@Test
public void wcTest() throws Exception {

    String fullUri = "/services/myEndpoint/v1?userIds=jsmith&objectType=DEFAULT";

    WebTestClient.ResponseSpec responseSpec1 = webTestClient.get().uri(fullUri, "").exchange().expectStatus().isOk();
}

This test expects to return "200 OK", but returns "404 NOT_FOUND". The request shown in the error response is:

GET http://localhost:8080/services/myEndpoint/v1?userIds=jsmith&objectType=DEFAULT

, obviously because it defaults to 8080, and I need to it to be 8068. I woould be grateful to anyone who can explain to define the port properly. Thanks.

score 2 · Accepted Answer · answered Nov 15 '20 at 17:56

I figured it out. I don't believe you are supposed to use

SpringBootTest.WebEnvironment.DEFINED_PORT

unless the endpoint is listening on 8080. In my case, since I needed to use a port number I could not control, i did this instead:

@RunWith(SpringRunner.class)
@FixMethodOrder(MethodSorters.NAME_ASCENDING)
public class SpringWebclientApplicationTests {

    private WebTestClient client;

    @Before
    public void setup() {
        String baseUri = "http://localhost:" + "8079";
        this.client = WebTestClient.bindToServer().baseUrl(baseUri).build();
    }

    @Test
    public void wcTest() throws Exception {

    String fullUri = "/services/myEndpoint/v1?userIds=jsmith&objectType=DEFAULT";
    WebTestClient.ResponseSpec responseSpec1 = client.get().uri(fullUri, "").exchange().expectStatus().isOk();
    }
}

, where I instantiate the webtestclient locally using the bindToServer method, and not as an autowired bean, and removing the:

@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.DEFINED_PORT)

, so it works fine now.

How to specify a specfic port number for Spring WebTestClient

1 Answers1