如何为Spring WebTestClient指定特定的端口号

WebTestClient webTestClient = WebTestClient.bindToServer()
        .baseUrl("http://localhost:{port}")  // 指定基本URL，端口号使用占位符
        .build();

@Test
public void testEndpoint() {
    webTestClient.get().uri("/endpoint")
            .exchange()
            .expectStatus().isOk()
            .expectBody(String.class).isEqualTo("Hello, World!");
}

@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT)
public class MyTest {

    @LocalServerPort
    private int port;

    private WebTestClient webTestClient;

    @BeforeEach
    public void setup() {
        webTestClient = WebTestClient.bindToServer()
                .baseUrl("http://localhost:" + port)
                .build();
    }

    @Test
    public void testEndpoint() {
        webTestClient.get().uri("/endpoint")
                .exchange()
                .expectStatus().isOk()
                .expectBody(String.class).isEqualTo("Hello, World!");
    }
}