Merge branch '2.7.x'

Closes gh-31807

Author: wilkinsona

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/web/mappings/reactive/DispatcherHandlersMappingDescriptionProvider.java

@@ -190,8 +190,6 @@ public void resources(Function<ServerRequest, Mono<Resource>> lookupFunction) {
 
 		@Override
 		public void attributes(Map<String, Object> attributes) {
-			// TODO Auto-generated method stub
-			throw new UnsupportedOperationException("Auto-generated method stub");
 		}
 
 		@Override

spring-boot-project/spring-boot-actuator/src/test/java/org/springframework/boot/actuate/web/mappings/MappingsEndpointTests.java

@@ -163,7 +163,7 @@ void reactiveWebMappings() {
 							contextMappings, "dispatcherHandlers");
 					assertThat(dispatcherHandlers).containsOnlyKeys("webHandler");
 					List<DispatcherHandlerMappingDescription> handlerMappings = dispatcherHandlers.get("webHandler");
-					assertThat(handlerMappings).hasSize(3);
+					assertThat(handlerMappings).hasSize(4);
 				});
 	}
 
@@ -210,6 +210,11 @@ void three() {
 
 		}
 
+		@Bean
+		RouterFunction<ServerResponse> routerFunctionWithAttributes() {
+			return route(GET("/four"), (request) -> ServerResponse.ok().build()).withAttribute("test", "test");
+		}
+
 	}
 
 	@Configuration(proxyBeanMethods = false)