Add default web handling of method validation errors

Closes gh-30644

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

@@ -39,7 +39,6 @@ import org.springframework.validation.FieldError;
 import org.springframework.validation.Validator;
 import org.springframework.validation.annotation.Validated;
 import org.springframework.validation.beanvalidation.LocalValidatorFactoryBean;
-import org.springframework.validation.beanvalidation.MethodValidationException;
 import org.springframework.validation.beanvalidation.ParameterValidationResult;
 import org.springframework.validation.beanvalidation.SpringValidatorAdapter;
 import org.springframework.web.bind.MethodArgumentNotValidException;
@@ -164,9 +163,9 @@ public class MethodValidationTests {
 		this.request.addParameter("name", "name=Faustino1234");
 		this.request.addHeader("myHeader", "123");
 
-		MethodValidationException ex = catchThrowableOfType(
+		HandlerMethodValidationException ex = catchThrowableOfType(
 				() -> this.handlerAdapter.handle(this.request, this.response, hm),
-				MethodValidationException.class);
+				HandlerMethodValidationException.class);
 
 		assertThat(this.jakartaValidator.getValidationCount()).isEqualTo(1);
 		assertThat(this.jakartaValidator.getMethodValidationCount()).isEqualTo(1);

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

@@ -43,6 +43,8 @@ import org.springframework.http.converter.HttpMessageNotWritableException;
 import org.springframework.stereotype.Controller;
 import org.springframework.validation.BindException;
 import org.springframework.validation.MapBindingResult;
+import org.springframework.validation.beanvalidation.MethodValidationException;
+import org.springframework.validation.beanvalidation.MethodValidationResult;
 import org.springframework.web.ErrorResponse;
 import org.springframework.web.HttpMediaTypeNotAcceptableException;
 import org.springframework.web.HttpMediaTypeNotSupportedException;
@@ -58,6 +60,7 @@ import org.springframework.web.context.request.ServletWebRequest;
 import org.springframework.web.context.request.WebRequest;
 import org.springframework.web.context.request.async.AsyncRequestTimeoutException;
 import org.springframework.web.context.support.StaticWebApplicationContext;
+import org.springframework.web.method.annotation.HandlerMethodValidationException;
 import org.springframework.web.multipart.support.MissingServletRequestPartException;
 import org.springframework.web.servlet.DispatcherServlet;
 import org.springframework.web.servlet.ModelAndView;
@@ -69,6 +72,7 @@ import org.springframework.web.testfixture.servlet.MockHttpServletResponse;
 import org.springframework.web.testfixture.servlet.MockServletConfig;
 
 import static org.assertj.core.api.Assertions.assertThat;
+import static org.mockito.BDDMockito.mock;
 
 /**
  * Unit tests for {@link ResponseEntityExceptionHandler}.
@@ -245,6 +249,16 @@ public class ResponseEntityExceptionHandlerTests {
 				new MapBindingResult(Collections.emptyMap(), "name")));
 	}
 
+	@Test
+	public void handlerMethodValidationException() {
+		testException(new HandlerMethodValidationException(mock(MethodValidationResult.class)));
+	}
+
+	@Test
+	public void methodValidationException() {
+		testException(new MethodValidationException(mock(MethodValidationResult.class)));
+	}
+
 	@Test
 	public void missingServletRequestPart() {
 		testException(new MissingServletRequestPartException("partName"));
@@ -351,6 +365,7 @@ public class ResponseEntityExceptionHandlerTests {
 	private ResponseEntity<Object> testException(Exception ex) {
 		try {
 			ResponseEntity<Object> entity = this.exceptionHandler.handleException(ex, this.request);
+			assertThat(entity).isNotNull();
 
 			// SPR-9653
 			if (HttpStatus.INTERNAL_SERVER_ERROR.equals(entity.getStatusCode())) {
@@ -383,7 +398,7 @@ public class ResponseEntityExceptionHandlerTests {
 	private static class NestedExceptionThrowingController {
 
 		@RequestMapping("/")
-		public void handleRequest() throws Exception {
+		public void handleRequest() {
 			throw new IllegalStateException(new ServletRequestBindingException("message"));
 		}
 	}