Polish "Add support for MVC router functions to mappings endpoint"

See gh-44163

Author: wilkinsona

spring-boot-project/spring-boot-actuator-autoconfigure/src/test/java/org/springframework/boot/actuate/autoconfigure/endpoint/web/documentation/MappingsEndpointServletDocumentationTests.java

@@ -63,6 +63,7 @@
  * Tests for generating documentation describing {@link MappingsEndpoint}.
  *
  * @author Andy Wilkinson
+ * @author Xiong Tang
  */
 @ExtendWith(RestDocumentationExtension.class)
 @SpringBootTest(webEnvironment = WebEnvironment.RANDOM_PORT)
@@ -136,10 +137,10 @@ void mappings() {
 					.description("Descriptor of the method as specified in the Java Language Specification."));
 		List<FieldDescriptor> handlerFunction = List.of(
 				fieldWithPath("*.[].details.handlerFunction").optional()
-						.type(JsonFieldType.OBJECT)
-						.description("Details of the function, if any, that will handle requests to this mapping."),
+					.type(JsonFieldType.OBJECT)
+					.description("Details of the function, if any, that will handle requests to this mapping."),
 				fieldWithPath("*.[].details.handlerFunction.className").type(JsonFieldType.STRING)
-						.description("Fully qualified name of the class of the function."));
+					.description("Fully qualified name of the class of the function."));
 		dispatcherServletFields.addAll(handlerFunction);
 		dispatcherServletFields.addAll(handlerMethod);
 		dispatcherServletFields.addAll(requestMappingConditions);

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/web/mappings/servlet/DispatcherServletMappingDetails.java

@@ -23,6 +23,7 @@
  * Details of a {@link DispatcherServlet} mapping.
  *
  * @author Andy Wilkinson
+ * @author Xiong Tang
  * @since 2.0.0
  */
 public class DispatcherServletMappingDetails {

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/web/mappings/servlet/DispatcherServletsMappingDescriptionProvider.java

@@ -60,6 +60,7 @@
  *
  * @author Andy Wilkinson
  * @author Stephane Nicoll
+ * @author Xiong Tang
  * @since 2.0.0
  */
 @ImportRuntimeHints(DispatcherServletsMappingDescriptionProviderRuntimeHints.class)

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/web/mappings/servlet/HandlerFunctionDescription.java

@@ -16,7 +16,6 @@
 
 package org.springframework.boot.actuate.web.mappings.servlet;
 
-
 import org.springframework.web.servlet.function.HandlerFunction;
 
 /**

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

@@ -57,6 +57,8 @@
 import org.springframework.web.servlet.config.annotation.EnableWebMvc;
 import org.springframework.web.servlet.config.annotation.PathMatchConfigurer;
 import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
+import org.springframework.web.servlet.function.RequestPredicates;
+import org.springframework.web.servlet.function.RouterFunctions;
 import org.springframework.web.util.pattern.PathPatternParser;
 
 import static org.assertj.core.api.Assertions.assertThat;
@@ -71,6 +73,7 @@
  *
  * @author Andy Wilkinson
  * @author Stephane Nicoll
+ * @author Xiong Tang
  */
 class MappingsEndpointTests {
 
@@ -88,7 +91,7 @@ void servletWebMappings() {
 						"dispatcherServlets");
 				assertThat(dispatcherServlets).containsOnlyKeys("dispatcherServlet");
 				List<DispatcherServletMappingDescription> handlerMappings = dispatcherServlets.get("dispatcherServlet");
-				assertThat(handlerMappings).hasSize(3);
+				assertThat(handlerMappings).hasSize(4);
 				List<ServletRegistrationMappingDescription> servlets = mappings(contextMappings, "servlets");
 				assertThat(servlets).hasSize(1);
 				List<FilterRegistrationMappingDescription> filters = mappings(contextMappings, "servletFilters");
@@ -111,7 +114,7 @@ void servletWebMappingsWithPathPatternParser() {
 						"dispatcherServlets");
 				assertThat(dispatcherServlets).containsOnlyKeys("dispatcherServlet");
 				List<DispatcherServletMappingDescription> handlerMappings = dispatcherServlets.get("dispatcherServlet");
-				assertThat(handlerMappings).hasSize(3);
+				assertThat(handlerMappings).hasSize(4);
 				List<ServletRegistrationMappingDescription> servlets = mappings(contextMappings, "servlets");
 				assertThat(servlets).hasSize(1);
 				List<FilterRegistrationMappingDescription> filters = mappings(contextMappings, "servletFilters");
@@ -131,9 +134,9 @@ void servletWebMappingsWithAdditionalDispatcherServlets() {
 						"dispatcherServlets");
 				assertThat(dispatcherServlets).containsOnlyKeys("dispatcherServlet",
 						"customDispatcherServletRegistration", "anotherDispatcherServletRegistration");
-				assertThat(dispatcherServlets.get("dispatcherServlet")).hasSize(3);
-				assertThat(dispatcherServlets.get("customDispatcherServletRegistration")).hasSize(3);
-				assertThat(dispatcherServlets.get("anotherDispatcherServletRegistration")).hasSize(3);
+				assertThat(dispatcherServlets.get("dispatcherServlet")).hasSize(4);
+				assertThat(dispatcherServlets.get("customDispatcherServletRegistration")).hasSize(4);
+				assertThat(dispatcherServlets.get("anotherDispatcherServletRegistration")).hasSize(4);
 			});
 	}
 
@@ -248,18 +251,26 @@ DispatcherServlet dispatcherServlet(WebApplicationContext context) throws Servle
 			return dispatcherServlet;
 		}
 
+		@Bean
+		org.springframework.web.servlet.function.RouterFunction<org.springframework.web.servlet.function.ServerResponse> routerFunction() {
+			return RouterFunctions
+				.route(RequestPredicates.GET("/one"),
+						(request) -> org.springframework.web.servlet.function.ServerResponse.ok().build())
+				.andRoute(RequestPredicates.POST("/two"),
+						(request) -> org.springframework.web.servlet.function.ServerResponse.ok().build());
+		}
+
 		@RequestMapping("/three")
 		void three() {
 
 		}
 
 		@Bean
-		org.springframework.web.servlet.function.RouterFunction<org.springframework.web.servlet.function.ServerResponse> routerFunction() {
-			return org.springframework.web.servlet.function.RouterFunctions
-					.route(org.springframework.web.servlet.function.RequestPredicates.GET("/one"),
-							(request) -> org.springframework.web.servlet.function.ServerResponse.ok().build())
-					.andRoute(org.springframework.web.servlet.function.RequestPredicates.POST("/two"),
-							(request) -> org.springframework.web.servlet.function.ServerResponse.ok().build());
+		org.springframework.web.servlet.function.RouterFunction<org.springframework.web.servlet.function.ServerResponse> routerFunctionWithAttributes() {
+			return RouterFunctions
+				.route(RequestPredicates.GET("/four"),
+						(request) -> org.springframework.web.servlet.function.ServerResponse.ok().build())
+				.withAttribute("test", "test");
 		}
 
 	}