Add actuator to webflux sample

Closes gh-10258

spring-boot-samples/spring-boot-sample-webflux/src/test/java/sample/webflux/SampleWebFluxApplicationTests.java

@@ -40,17 +40,24 @@ public class SampleWebFluxApplicationTests {
 	private WebTestClient webClient;
 
 	@Test
-	public void testWelcome() throws Exception {
+	public void testWelcome() {
 		this.webClient.get().uri("/").accept(MediaType.TEXT_PLAIN).exchange()
 				.expectBody(String.class).isEqualTo("Hello World");
 	}
 
 	@Test
-	public void testEcho() throws Exception {
+	public void testEcho() {
 		this.webClient.post().uri("/echo").contentType(MediaType.TEXT_PLAIN)
 				.accept(MediaType.TEXT_PLAIN)
 				.body(Mono.just("Hello WebFlux!"), String.class).exchange()
 				.expectBody(String.class).isEqualTo("Hello WebFlux!");
 	}
 
+	@Test
+	public void testActuatorStatus() {
+		this.webClient.get().uri("/application/status").accept(MediaType.APPLICATION_JSON)
+				.exchange().expectStatus().isOk().expectBody()
+				.json("{\"status\":\"UP\"}");
+	}
+
 }