Use MessageSource for @ExceptionHandler methods

Follow-up for commit bb816c123c

See gh-27203

spring-webmvc/src/test/java/org/springframework/web/servlet/mvc/method/annotation/ExceptionHandlerExceptionResolverTests.java

@@ -19,7 +19,9 @@ package org.springframework.web.servlet.mvc.method.annotation;
 import java.io.IOException;
 import java.io.UnsupportedEncodingException;
 import java.io.Writer;
+import java.net.SocketTimeoutException;
 import java.util.Collections;
+import java.util.Locale;
 
 import org.junit.jupiter.api.BeforeAll;
 import org.junit.jupiter.api.BeforeEach;
@@ -30,8 +32,11 @@ import org.springframework.beans.FatalBeanException;
 import org.springframework.context.annotation.AnnotationConfigApplicationContext;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
+import org.springframework.context.i18n.LocaleContextHolder;
+import org.springframework.context.support.StaticApplicationContext;
 import org.springframework.core.MethodParameter;
 import org.springframework.core.annotation.Order;
+import org.springframework.http.HttpStatus;
 import org.springframework.http.MediaType;
 import org.springframework.http.converter.HttpMessageConverter;
 import org.springframework.http.server.ServerHttpRequest;
@@ -42,6 +47,7 @@ import org.springframework.util.ClassUtils;
 import org.springframework.web.HttpRequestHandler;
 import org.springframework.web.bind.annotation.ExceptionHandler;
 import org.springframework.web.bind.annotation.ResponseBody;
+import org.springframework.web.bind.annotation.ResponseStatus;
 import org.springframework.web.bind.annotation.RestControllerAdvice;
 import org.springframework.web.context.support.WebApplicationObjectSupport;
 import org.springframework.web.method.HandlerMethod;
@@ -333,6 +339,28 @@ public class ExceptionHandlerExceptionResolverTests {
 		assertThat(this.response.getContentAsString()).isEqualTo(rootCause.toString());
 	}
 
+	@Test //gh-27156
+	void resolveExceptionWithReasonResovledByMessageSource() throws Exception {
+		AnnotationConfigApplicationContext ctx = new AnnotationConfigApplicationContext(MyConfig.class);
+		StaticApplicationContext context = new StaticApplicationContext(ctx);
+		Locale locale = Locale.ENGLISH;
+		context.addMessage("gateway.timeout", locale, "Gateway Timeout");
+		context.refresh();
+		LocaleContextHolder.setLocale(locale);
+		this.resolver.setApplicationContext(context);
+		this.resolver.afterPropertiesSet();
+
+		SocketTimeoutException ex = new SocketTimeoutException();
+		HandlerMethod handlerMethod = new HandlerMethod(new ResponseBodyController(), "handle");
+		ModelAndView mav = this.resolver.resolveException(this.request, this.response, handlerMethod, ex);
+
+		assertThat(mav).as("Exception was not handled").isNotNull();
+		assertThat(mav.isEmpty()).isTrue();
+		assertThat(this.response.getStatus()).isEqualTo(HttpStatus.GATEWAY_TIMEOUT.value());
+		assertThat(this.response.getErrorMessage()).isEqualTo("Gateway Timeout");
+		assertThat(this.response.getContentAsString()).isEqualTo("");
+	}
+
 	@Test
 	void resolveExceptionControllerAdviceHandler() throws Exception {
 		AnnotationConfigApplicationContext ctx = new AnnotationConfigApplicationContext(MyControllerAdviceConfig.class);
@@ -530,6 +558,16 @@ public class ExceptionHandlerExceptionResolverTests {
 		}
 	}
 
+	@RestControllerAdvice
+	@Order(3)
+	static class ResponseStatusTestExceptionResolver {
+
+		@ExceptionHandler(SocketTimeoutException.class)
+		@ResponseStatus(code = HttpStatus.GATEWAY_TIMEOUT, reason = "gateway.timeout")
+		public void handleException(SocketTimeoutException ex) {
+
+		}
+	}
 
 	@Configuration
 	static class MyConfig {
@@ -543,6 +581,11 @@ public class ExceptionHandlerExceptionResolverTests {
 		public AnotherTestExceptionResolver anotherTestExceptionResolver() {
 			return new AnotherTestExceptionResolver();
 		}
+
+		@Bean
+		public ResponseStatusTestExceptionResolver responseStatusTestExceptionResolver() {
+			return new ResponseStatusTestExceptionResolver();
+		}
 	}