Update MockMvc section on Streaming in the docs

Closes gh-32687

src/docs/asciidoc/testing.adoc

@@ -7670,35 +7670,13 @@ or reactive type such as Reactor `Mono`:
 [[spring-mvc-test-vs-streaming-response]]
 ===== Streaming Responses
 
-The best way to test streaming responses such as Server-Sent Events is through the
-<<WebTestClient>> which can be used as a test client to connect to a `MockMvc` instance
-to perform tests on Spring MVC controllers without a running server. For example:
-
-[source,java,indent=0,subs="verbatim,quotes",role="primary"]
-.Java
-----
-	WebTestClient client = MockMvcWebTestClient.bindToController(new SseController()).build();
-
-	FluxExchangeResult<Person> exchangeResult = client.get()
-			.uri("/persons")
-			.exchange()
-			.expectStatus().isOk()
-			.expectHeader().contentType("text/event-stream")
-			.returnResult(Person.class);
-
-	// Use StepVerifier from Project Reactor to test the streaming response
-
-	StepVerifier.create(exchangeResult.getResponseBody())
-			.expectNext(new Person("N0"), new Person("N1"), new Person("N2"))
-			.expectNextCount(4)
-			.consumeNextWith(person -> assertThat(person.getName()).endsWith("7"))
-			.thenCancel()
-			.verify();
-----
-
-`WebTestClient` can also connect to a live server and perform full end-to-end integration
-tests. This is also supported in Spring Boot where you can
-{doc-spring-boot}/html/spring-boot-features.html#boot-features-testing-spring-boot-applications-testing-with-running-server[test a running server].
+You can use `WebTestClient` to test <<testing/testing-webtestclient.adoc#webtestclient-stream,streaming responses>>
+such as Server-Sent Events. However, `MockMvcWebTestClient` doesn't support infinite
+streams because there is no way to cancel the server stream from the client side.
+To test infinite streams, you'll need to
+<<testing/testing-webtestclient.adoc#webtestclient-server-config,bind to>> a running server,
+or when using Spring Boot,
+{doc-spring-boot}/html/spring-boot-features.html#boot-features-testing-spring-boot-applications-testing-with-running-server[test with a running server].
 
 
 [[spring-mvc-test-server-filters]]