WebMvcAutoConfigurationTests.java

/*
 * Copyright 2012-2021 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.springframework.boot.autoconfigure.web.servlet;

import java.time.LocalDateTime;
import java.time.LocalTime;
import java.time.ZoneId;
import java.time.ZonedDateTime;
import java.time.format.DateTimeFormatter;
import java.time.format.FormatStyle;
import java.util.Collections;
import java.util.Date;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Locale;
import java.util.Map;
import java.util.Map.Entry;
import java.util.concurrent.Executor;
import java.util.concurrent.TimeUnit;
import java.util.function.Consumer;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.validation.ValidatorFactory;

import org.junit.jupiter.api.Test;

import org.springframework.boot.autoconfigure.AutoConfigurations;
import org.springframework.boot.autoconfigure.context.PropertyPlaceholderAutoConfiguration;
import org.springframework.boot.autoconfigure.http.HttpMessageConverters;
import org.springframework.boot.autoconfigure.http.HttpMessageConvertersAutoConfiguration;
import org.springframework.boot.autoconfigure.task.TaskExecutionAutoConfiguration;
import org.springframework.boot.autoconfigure.validation.ValidationAutoConfiguration;
import org.springframework.boot.autoconfigure.validation.ValidatorAdapter;
import org.springframework.boot.autoconfigure.web.servlet.WebMvcAutoConfiguration.WebMvcAutoConfigurationAdapter;
import org.springframework.boot.test.context.assertj.AssertableWebApplicationContext;
import org.springframework.boot.test.context.runner.ContextConsumer;
import org.springframework.boot.test.context.runner.WebApplicationContextRunner;
import org.springframework.boot.web.server.WebServerFactoryCustomizerBeanPostProcessor;
import org.springframework.boot.web.servlet.FilterRegistrationBean;
import org.springframework.boot.web.servlet.ServletRegistrationBean;
import org.springframework.boot.web.servlet.filter.OrderedFormContentFilter;
import org.springframework.boot.web.servlet.server.ServletWebServerFactory;
import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Import;
import org.springframework.core.convert.ConversionService;
import org.springframework.core.io.ClassPathResource;
import org.springframework.core.io.Resource;
import org.springframework.core.task.AsyncTaskExecutor;
import org.springframework.format.Parser;
import org.springframework.format.Printer;
import org.springframework.format.support.FormattingConversionService;
import org.springframework.http.CacheControl;
import org.springframework.http.HttpHeaders;
import org.springframework.http.MediaType;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.mock.web.MockHttpServletRequest;
import org.springframework.test.util.ReflectionTestUtils;
import org.springframework.util.StringUtils;
import org.springframework.validation.Validator;
import org.springframework.validation.beanvalidation.LocalValidatorFactoryBean;
import org.springframework.web.accept.ContentNegotiationManager;
import org.springframework.web.accept.ContentNegotiationStrategy;
import org.springframework.web.accept.ParameterContentNegotiationStrategy;
import org.springframework.web.accept.PathExtensionContentNegotiationStrategy;
import org.springframework.web.bind.support.ConfigurableWebBindingInitializer;
import org.springframework.web.context.request.ServletWebRequest;
import org.springframework.web.cors.UrlBasedCorsConfigurationSource;
import org.springframework.web.filter.FormContentFilter;
import org.springframework.web.filter.HiddenHttpMethodFilter;
import org.springframework.web.filter.RequestContextFilter;
import org.springframework.web.servlet.DispatcherServlet;
import org.springframework.web.servlet.HandlerAdapter;
import org.springframework.web.servlet.HandlerExceptionResolver;
import org.springframework.web.servlet.HandlerMapping;
import org.springframework.web.servlet.LocaleResolver;
import org.springframework.web.servlet.View;
import org.springframework.web.servlet.ViewResolver;
import org.springframework.web.servlet.config.annotation.AsyncSupportConfigurer;
import org.springframework.web.servlet.config.annotation.ContentNegotiationConfigurer;
import org.springframework.web.servlet.config.annotation.CorsRegistry;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
import org.springframework.web.servlet.handler.AbstractHandlerExceptionResolver;
import org.springframework.web.servlet.handler.HandlerExceptionResolverComposite;
import org.springframework.web.servlet.handler.SimpleUrlHandlerMapping;
import org.springframework.web.servlet.i18n.AcceptHeaderLocaleResolver;
import org.springframework.web.servlet.i18n.FixedLocaleResolver;
import org.springframework.web.servlet.mvc.method.annotation.ExceptionHandlerExceptionResolver;
import org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter;
import org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping;
import org.springframework.web.servlet.mvc.support.DefaultHandlerExceptionResolver;
import org.springframework.web.servlet.resource.AppCacheManifestTransformer;
import org.springframework.web.servlet.resource.CachingResourceResolver;
import org.springframework.web.servlet.resource.CachingResourceTransformer;
import org.springframework.web.servlet.resource.ContentVersionStrategy;
import org.springframework.web.servlet.resource.CssLinkResourceTransformer;
import org.springframework.web.servlet.resource.EncodedResourceResolver;
import org.springframework.web.servlet.resource.FixedVersionStrategy;
import org.springframework.web.servlet.resource.PathResourceResolver;
import org.springframework.web.servlet.resource.ResourceHttpRequestHandler;
import org.springframework.web.servlet.resource.ResourceResolver;
import org.springframework.web.servlet.resource.ResourceTransformer;
import org.springframework.web.servlet.resource.VersionResourceResolver;
import org.springframework.web.servlet.resource.VersionStrategy;
import org.springframework.web.servlet.view.AbstractView;
import org.springframework.web.servlet.view.ContentNegotiatingViewResolver;
import org.springframework.web.util.UrlPathHelper;

import static org.assertj.core.api.Assertions.assertThat;
import static org.mockito.Mockito.mock;

/**
 * Tests for {@link WebMvcAutoConfiguration}.
 *
 * @author Phillip Webb
 * @author Dave Syer
 * @author Andy Wilkinson
 * @author Stephane Nicoll
 * @author Brian Clozel
 * @author Eddú Meléndez
 * @author Kristine Jetzke
 * @author Artsiom Yudovin
 */
class WebMvcAutoConfigurationTests {

	private static final MockServletWebServerFactory webServerFactory = new MockServletWebServerFactory();

	private final WebApplicationContextRunner contextRunner = new WebApplicationContextRunner()
			.withConfiguration(
					AutoConfigurations.of(WebMvcAutoConfiguration.class, DispatcherServletAutoConfiguration.class,
							HttpMessageConvertersAutoConfiguration.class, PropertyPlaceholderAutoConfiguration.class))
			.withUserConfiguration(Config.class);

	@Test
	void handlerAdaptersCreated() {
		this.contextRunner.run((context) -> {
			assertThat(context).getBeans(HandlerAdapter.class).hasSize(4);
			assertThat(context.getBean(RequestMappingHandlerAdapter.class).getMessageConverters()).isNotEmpty()
					.isEqualTo(context.getBean(HttpMessageConverters.class).getConverters());
		});
	}

	@Test
	void handlerMappingsCreated() {
		this.contextRunner.run((context) -> assertThat(context).getBeans(HandlerMapping.class).hasSize(5));
	}

	@Test
	void resourceHandlerMapping() {
		this.contextRunner.run((context) -> {
			Map<String, List<Resource>> locations = getResourceMappingLocations(context);
			assertThat(locations.get("/**")).hasSize(5);
			assertThat(locations.get("/webjars/**")).hasSize(1);
			assertThat(locations.get("/webjars/**").get(0))
					.isEqualTo(new ClassPathResource("/META-INF/resources/webjars/"));
			assertThat(getResourceResolvers(context, "/webjars/**")).hasSize(1);
			assertThat(getResourceTransformers(context, "/webjars/**")).hasSize(0);
			assertThat(getResourceResolvers(context, "/**")).hasSize(1);
			assertThat(getResourceTransformers(context, "/**")).hasSize(0);
		});
	}

	@Test
	void customResourceHandlerMapping() {
		this.contextRunner.withPropertyValues("spring.mvc.static-path-pattern:/static/**").run((context) -> {
			Map<String, List<Resource>> locations = getResourceMappingLocations(context);
			assertThat(locations.get("/static/**")).hasSize(5);
			assertThat(getResourceResolvers(context, "/static/**")).hasSize(1);
		});
	}

	@Test
	void resourceHandlerMappingOverrideWebjars() {
		this.contextRunner.withUserConfiguration(WebJars.class).run((context) -> {
			Map<String, List<Resource>> locations = getResourceMappingLocations(context);
			assertThat(locations.get("/webjars/**")).hasSize(1);
			assertThat(locations.get("/webjars/**").get(0)).isEqualTo(new ClassPathResource("/foo/"));
		});
	}

	@Test
	void resourceHandlerMappingOverrideAll() {
		this.contextRunner.withUserConfiguration(AllResources.class).run((context) -> {
			Map<String, List<Resource>> locations = getResourceMappingLocations(context);
			assertThat(locations.get("/**")).hasSize(1);
			assertThat(locations.get("/**").get(0)).isEqualTo(new ClassPathResource("/foo/"));
		});
	}

	@Test
	void resourceHandlerMappingDisabled() {
		this.contextRunner.withPropertyValues("spring.resources.add-mappings:false")
				.run((context) -> assertThat(getResourceMappingLocations(context)).hasSize(0));
	}

	@Test
	void resourceHandlerChainEnabled() {
		this.contextRunner.withPropertyValues("spring.resources.chain.enabled:true").run((context) -> {
			assertThat(getResourceResolvers(context, "/webjars/**")).hasSize(2);
			assertThat(getResourceTransformers(context, "/webjars/**")).hasSize(1);
			assertThat(getResourceResolvers(context, "/**")).extractingResultOf("getClass")
					.containsOnly(CachingResourceResolver.class, PathResourceResolver.class);
			assertThat(getResourceTransformers(context, "/**")).extractingResultOf("getClass")
					.containsOnly(CachingResourceTransformer.class);
		});
	}

	@Test
	void resourceHandlerFixedStrategyEnabled() {
		this.contextRunner.withPropertyValues("spring.resources.chain.strategy.fixed.enabled:true",
				"spring.resources.chain.strategy.fixed.version:test",
				"spring.resources.chain.strategy.fixed.paths:/**/*.js").run((context) -> {
					assertThat(getResourceResolvers(context, "/webjars/**")).hasSize(3);
					assertThat(getResourceTransformers(context, "/webjars/**")).hasSize(2);
					assertThat(getResourceResolvers(context, "/**")).extractingResultOf("getClass").containsOnly(
							CachingResourceResolver.class, VersionResourceResolver.class, PathResourceResolver.class);
					assertThat(getResourceTransformers(context, "/**")).extractingResultOf("getClass")
							.containsOnly(CachingResourceTransformer.class, CssLinkResourceTransformer.class);
					VersionResourceResolver resolver = (VersionResourceResolver) getResourceResolvers(context, "/**")
							.get(1);
					assertThat(resolver.getStrategyMap().get("/**/*.js")).isInstanceOf(FixedVersionStrategy.class);
				});
	}

	@Test
	void resourceHandlerContentStrategyEnabled() {
		this.contextRunner.withPropertyValues("spring.resources.chain.strategy.content.enabled:true",
				"spring.resources.chain.strategy.content.paths:/**,/*.png").run((context) -> {
					assertThat(getResourceResolvers(context, "/webjars/**")).hasSize(3);
					assertThat(getResourceTransformers(context, "/webjars/**")).hasSize(2);
					assertThat(getResourceResolvers(context, "/**")).extractingResultOf("getClass").containsOnly(
							CachingResourceResolver.class, VersionResourceResolver.class, PathResourceResolver.class);
					assertThat(getResourceTransformers(context, "/**")).extractingResultOf("getClass")
							.containsOnly(CachingResourceTransformer.class, CssLinkResourceTransformer.class);
					VersionResourceResolver resolver = (VersionResourceResolver) getResourceResolvers(context, "/**")
							.get(1);
					assertThat(resolver.getStrategyMap().get("/*.png")).isInstanceOf(ContentVersionStrategy.class);
				});
	}

	@Test
	void resourceHandlerChainCustomized() {
		this.contextRunner
				.withPropertyValues("spring.resources.chain.enabled:true", "spring.resources.chain.cache:false",
						"spring.resources.chain.strategy.content.enabled:true",
						"spring.resources.chain.strategy.content.paths:/**,/*.png",
						"spring.resources.chain.strategy.fixed.enabled:true",
						"spring.resources.chain.strategy.fixed.version:test",
						"spring.resources.chain.strategy.fixed.paths:/**/*.js",
						"spring.resources.chain.html-application-cache:true", "spring.resources.chain.compressed:true")
				.run((context) -> {
					assertThat(getResourceResolvers(context, "/webjars/**")).hasSize(3);
					assertThat(getResourceTransformers(context, "/webjars/**")).hasSize(2);
					assertThat(getResourceResolvers(context, "/**")).extractingResultOf("getClass").containsOnly(
							EncodedResourceResolver.class, VersionResourceResolver.class, PathResourceResolver.class);
					assertThat(getResourceTransformers(context, "/**")).extractingResultOf("getClass")
							.containsOnly(CssLinkResourceTransformer.class, AppCacheManifestTransformer.class);
					VersionResourceResolver resolver = (VersionResourceResolver) getResourceResolvers(context, "/**")
							.get(1);
					Map<String, VersionStrategy> strategyMap = resolver.getStrategyMap();
					assertThat(strategyMap.get("/*.png")).isInstanceOf(ContentVersionStrategy.class);
					assertThat(strategyMap.get("/**/*.js")).isInstanceOf(FixedVersionStrategy.class);
				});
	}

	@Test
	void noLocaleResolver() {
		this.contextRunner.run((context) -> assertThat(context).doesNotHaveBean(LocaleResolver.class));
	}

	@Test
	void overrideLocale() {
		this.contextRunner.withPropertyValues("spring.mvc.locale:en_UK", "spring.mvc.locale-resolver=fixed")
				.run((loader) -> {
					// mock request and set user preferred locale
					MockHttpServletRequest request = new MockHttpServletRequest();
					request.addPreferredLocale(StringUtils.parseLocaleString("nl_NL"));
					request.addHeader(HttpHeaders.ACCEPT_LANGUAGE, "nl_NL");
					LocaleResolver localeResolver = loader.getBean(LocaleResolver.class);
					assertThat(localeResolver).isInstanceOf(FixedLocaleResolver.class);
					Locale locale = localeResolver.resolveLocale(request);
					// test locale resolver uses fixed locale and not user preferred
					// locale
					assertThat(locale.toString()).isEqualTo("en_UK");
				});
	}

	@Test
	void useAcceptHeaderLocale() {
		this.contextRunner.withPropertyValues("spring.mvc.locale:en_UK").run((loader) -> {
			// mock request and set user preferred locale
			MockHttpServletRequest request = new MockHttpServletRequest();
			request.addPreferredLocale(StringUtils.parseLocaleString("nl_NL"));
			request.addHeader(HttpHeaders.ACCEPT_LANGUAGE, "nl_NL");
			LocaleResolver localeResolver = loader.getBean(LocaleResolver.class);
			assertThat(localeResolver).isInstanceOf(AcceptHeaderLocaleResolver.class);
			Locale locale = localeResolver.resolveLocale(request);
			// test locale resolver uses user preferred locale
			assertThat(locale.toString()).isEqualTo("nl_NL");
		});
	}

	@Test
	void useDefaultLocaleIfAcceptHeaderNoSet() {
		this.contextRunner.withPropertyValues("spring.mvc.locale:en_UK").run((context) -> {
			// mock request and set user preferred locale
			MockHttpServletRequest request = new MockHttpServletRequest();
			LocaleResolver localeResolver = context.getBean(LocaleResolver.class);
			assertThat(localeResolver).isInstanceOf(AcceptHeaderLocaleResolver.class);
			Locale locale = localeResolver.resolveLocale(request);
			// test locale resolver uses default locale if no header is set
			assertThat(locale.toString()).isEqualTo("en_UK");
		});
	}

	@Test
	void defaultDateFormat() {
		this.contextRunner.run((context) -> {
			FormattingConversionService conversionService = context.getBean(FormattingConversionService.class);
			Date date = Date.from(ZonedDateTime.of(1988, 6, 25, 20, 30, 0, 0, ZoneId.systemDefault()).toInstant());
			// formatting conversion service should use simple toString()
			assertThat(conversionService.convert(date, String.class)).isEqualTo(date.toString());
		});
	}

	@Test
	void customDateFormat() {
		this.contextRunner.withPropertyValues("spring.mvc.format.date:dd*MM*yyyy").run((context) -> {
			FormattingConversionService conversionService = context.getBean(FormattingConversionService.class);
			Date date = Date.from(ZonedDateTime.of(1988, 6, 25, 20, 30, 0, 0, ZoneId.systemDefault()).toInstant());
			assertThat(conversionService.convert(date, String.class)).isEqualTo("25*06*1988");
		});
	}

	@Test
	void customDateFormatWithDeprecatedProperty() {
		this.contextRunner.withPropertyValues("spring.mvc.date-format:dd*MM*yyyy").run((context) -> {
			FormattingConversionService conversionService = context.getBean(FormattingConversionService.class);
			Date date = Date.from(ZonedDateTime.of(1988, 6, 25, 20, 30, 0, 0, ZoneId.systemDefault()).toInstant());
			assertThat(conversionService.convert(date, String.class)).isEqualTo("25*06*1988");
		});
	}

	@Test
	void defaultTimeFormat() {
		this.contextRunner.run((context) -> {
			FormattingConversionService conversionService = context.getBean(FormattingConversionService.class);
			LocalTime time = LocalTime.of(11, 43, 10);
			assertThat(conversionService.convert(time, String.class))
					.isEqualTo(DateTimeFormatter.ofLocalizedTime(FormatStyle.SHORT).format(time));
		});
	}

	@Test
	void customTimeFormat() {
		this.contextRunner.withPropertyValues("spring.mvc.format.time=HH:mm:ss").run((context) -> {
			FormattingConversionService conversionService = context.getBean(FormattingConversionService.class);
			LocalTime time = LocalTime.of(11, 43, 10);
			assertThat(conversionService.convert(time, String.class)).isEqualTo("11:43:10");
		});
	}

	@Test
	void defaultDateTimeFormat() {
		this.contextRunner.run((context) -> {
			FormattingConversionService conversionService = context.getBean(FormattingConversionService.class);
			LocalDateTime dateTime = LocalDateTime.of(2020, 4, 28, 11, 43, 10);
			assertThat(conversionService.convert(dateTime, String.class))
					.isEqualTo(DateTimeFormatter.ofLocalizedDateTime(FormatStyle.SHORT).format(dateTime));
		});
	}

	@Test
	void customDateTimeTimeFormat() {
		this.contextRunner.withPropertyValues("spring.mvc.format.date-time=yyyy-MM-dd HH:mm:ss").run((context) -> {
			FormattingConversionService conversionService = context.getBean(FormattingConversionService.class);
			LocalDateTime dateTime = LocalDateTime.of(2020, 4, 28, 11, 43, 10);
			assertThat(conversionService.convert(dateTime, String.class)).isEqualTo("2020-04-28 11:43:10");
		});
	}

	@Test
	void noMessageCodesResolver() {
		this.contextRunner.run(
				(context) -> assertThat(context.getBean(WebMvcAutoConfigurationAdapter.class).getMessageCodesResolver())
						.isNull());
	}

	@Test
	void overrideMessageCodesFormat() {
		this.contextRunner.withPropertyValues("spring.mvc.messageCodesResolverFormat:POSTFIX_ERROR_CODE").run(
				(context) -> assertThat(context.getBean(WebMvcAutoConfigurationAdapter.class).getMessageCodesResolver())
						.isNotNull());
	}

	@Test
	void ignoreDefaultModelOnRedirectIsTrue() {
		this.contextRunner.run((context) -> assertThat(context.getBean(RequestMappingHandlerAdapter.class))
				.extracting("ignoreDefaultModelOnRedirect").isEqualTo(true));
	}

	@Test
	void overrideIgnoreDefaultModelOnRedirect() {
		this.contextRunner.withPropertyValues("spring.mvc.ignore-default-model-on-redirect:false")
				.run((context) -> assertThat(context.getBean(RequestMappingHandlerAdapter.class))
						.extracting("ignoreDefaultModelOnRedirect").isEqualTo(false));
	}

	@Test
	void customViewResolver() {
		this.contextRunner.withUserConfiguration(CustomViewResolver.class)
				.run((context) -> assertThat(context.getBean("viewResolver")).isInstanceOf(MyViewResolver.class));
	}

	@Test
	void customContentNegotiatingViewResolver() {
		this.contextRunner.withUserConfiguration(CustomContentNegotiatingViewResolver.class)
				.run((context) -> assertThat(context).getBeanNames(ContentNegotiatingViewResolver.class)
						.containsOnly("myViewResolver"));
	}

	@Test
	void defaultAsyncRequestTimeout() {
		this.contextRunner.run((context) -> assertThat(context.getBean(RequestMappingHandlerAdapter.class))
				.extracting("asyncRequestTimeout").isNull());
	}

	@Test
	void customAsyncRequestTimeout() {
		this.contextRunner.withPropertyValues("spring.mvc.async.request-timeout:12345")
				.run((context) -> assertThat(context.getBean(RequestMappingHandlerAdapter.class))
						.extracting("asyncRequestTimeout").isEqualTo(12345L));
	}

	@Test
	void asyncTaskExecutorWithApplicationTaskExecutor() {
		this.contextRunner.withConfiguration(AutoConfigurations.of(TaskExecutionAutoConfiguration.class))
				.run((context) -> {
					assertThat(context).hasSingleBean(AsyncTaskExecutor.class);
					assertThat(context.getBean(RequestMappingHandlerAdapter.class)).extracting("taskExecutor")
							.isSameAs(context.getBean("applicationTaskExecutor"));
				});
	}

	@Test
	void asyncTaskExecutorWithNonMatchApplicationTaskExecutorBean() {
		this.contextRunner.withUserConfiguration(CustomApplicationTaskExecutorConfig.class)
				.withConfiguration(AutoConfigurations.of(TaskExecutionAutoConfiguration.class)).run((context) -> {
					assertThat(context).doesNotHaveBean(AsyncTaskExecutor.class);
					assertThat(context.getBean(RequestMappingHandlerAdapter.class)).extracting("taskExecutor")
							.isNotSameAs(context.getBean("applicationTaskExecutor"));
				});
	}

	@Test
	void asyncTaskExecutorWithMvcConfigurerCanOverrideExecutor() {
		this.contextRunner.withUserConfiguration(CustomAsyncTaskExecutorConfigurer.class)
				.withConfiguration(AutoConfigurations.of(TaskExecutionAutoConfiguration.class))
				.run((context) -> assertThat(context.getBean(RequestMappingHandlerAdapter.class))
						.extracting("taskExecutor")
						.isSameAs(context.getBean(CustomAsyncTaskExecutorConfigurer.class).taskExecutor));
	}

	@Test
	void asyncTaskExecutorWithCustomNonApplicationTaskExecutor() {
		this.contextRunner.withUserConfiguration(CustomAsyncTaskExecutorConfig.class)
				.withConfiguration(AutoConfigurations.of(TaskExecutionAutoConfiguration.class)).run((context) -> {
					assertThat(context).hasSingleBean(AsyncTaskExecutor.class);
					assertThat(context.getBean(RequestMappingHandlerAdapter.class)).extracting("taskExecutor")
							.isNotSameAs(context.getBean("customTaskExecutor"));
				});
	}

	@Test
	@Deprecated
	void customMediaTypes() {
		this.contextRunner.withPropertyValues("spring.mvc.contentnegotiation.media-types.yaml:text/yaml",
				"spring.mvc.contentnegotiation.favor-path-extension:true").run((context) -> {
					RequestMappingHandlerAdapter adapter = context.getBean(RequestMappingHandlerAdapter.class);
					ContentNegotiationManager contentNegotiationManager = (ContentNegotiationManager) ReflectionTestUtils
							.getField(adapter, "contentNegotiationManager");
					assertThat(contentNegotiationManager.getAllFileExtensions()).contains("yaml");
				});
	}

	@Test
	void formContentFilterIsAutoConfigured() {
		this.contextRunner.run((context) -> assertThat(context).hasSingleBean(OrderedFormContentFilter.class));
	}

	@Test
	void formContentFilterCanBeOverridden() {
		this.contextRunner.withUserConfiguration(CustomFormContentFilter.class).run((context) -> {
			assertThat(context).doesNotHaveBean(OrderedFormContentFilter.class);
			assertThat(context).hasSingleBean(FormContentFilter.class);
		});
	}

	@Test
	void formContentFilterCanBeDisabled() {
		this.contextRunner.withPropertyValues("spring.mvc.formcontent.filter.enabled=false")
				.run((context) -> assertThat(context).doesNotHaveBean(FormContentFilter.class));
	}

	@Test
	void hiddenHttpMethodFilterCanBeEnabled() {
		this.contextRunner.withPropertyValues("spring.mvc.hiddenmethod.filter.enabled=true")
				.run((context) -> assertThat(context).hasSingleBean(HiddenHttpMethodFilter.class));
	}

	@Test
	void hiddenHttpMethodFilterDisabledByDefault() {
		this.contextRunner.run((context) -> assertThat(context).doesNotHaveBean(HiddenHttpMethodFilter.class));
	}

	@Test
	void customConfigurableWebBindingInitializer() {
		this.contextRunner.withUserConfiguration(CustomConfigurableWebBindingInitializer.class).run(
				(context) -> assertThat(context.getBean(RequestMappingHandlerAdapter.class).getWebBindingInitializer())
						.isInstanceOf(CustomWebBindingInitializer.class));
	}

	@Test
	void customRequestMappingHandlerMapping() {
		this.contextRunner.withUserConfiguration(CustomRequestMappingHandlerMapping.class).run((context) -> {
			assertThat(context).getBean(RequestMappingHandlerMapping.class)
					.isInstanceOf(MyRequestMappingHandlerMapping.class);
			assertThat(context.getBean(CustomRequestMappingHandlerMapping.class).handlerMappings).isEqualTo(1);
		});
	}

	@Test
	void customRequestMappingHandlerAdapter() {
		this.contextRunner.withUserConfiguration(CustomRequestMappingHandlerAdapter.class).run((context) -> {
			assertThat(context).getBean(RequestMappingHandlerAdapter.class)
					.isInstanceOf(MyRequestMappingHandlerAdapter.class);
			assertThat(context.getBean(CustomRequestMappingHandlerAdapter.class).handlerAdapters).isEqualTo(1);
		});
	}

	@Test
	void customExceptionHandlerExceptionResolver() {
		this.contextRunner.withUserConfiguration(CustomExceptionHandlerExceptionResolver.class)
				.run((context) -> assertThat(
						context.getBean(CustomExceptionHandlerExceptionResolver.class).exceptionResolvers)
								.isEqualTo(1));
	}

	@Test
	void multipleWebMvcRegistrations() {
		this.contextRunner.withUserConfiguration(MultipleWebMvcRegistrations.class).run((context) -> {
			assertThat(context.getBean(RequestMappingHandlerMapping.class))
					.isNotInstanceOf(MyRequestMappingHandlerMapping.class);
			assertThat(context.getBean(RequestMappingHandlerAdapter.class))
					.isNotInstanceOf(MyRequestMappingHandlerAdapter.class);
		});
	}

	@Test
	void defaultLogResolvedException() {
		this.contextRunner.run(assertExceptionResolverWarnLoggers((logger) -> assertThat(logger).isNull()));
	}

	@Test
	void customLogResolvedException() {
		this.contextRunner.withPropertyValues("spring.mvc.log-resolved-exception:true")
				.run(assertExceptionResolverWarnLoggers((logger) -> assertThat(logger).isNotNull()));
	}

	private ContextConsumer<AssertableWebApplicationContext> assertExceptionResolverWarnLoggers(
			Consumer<Object> consumer) {
		return (context) -> {
			HandlerExceptionResolver resolver = context.getBean(HandlerExceptionResolver.class);
			assertThat(resolver).isInstanceOf(HandlerExceptionResolverComposite.class);
			List<HandlerExceptionResolver> delegates = ((HandlerExceptionResolverComposite) resolver)
					.getExceptionResolvers();
			for (HandlerExceptionResolver delegate : delegates) {
				if (delegate instanceof AbstractHandlerExceptionResolver
						&& !(delegate instanceof DefaultHandlerExceptionResolver)) {
					consumer.accept(ReflectionTestUtils.getField(delegate, "warnLogger"));
				}
			}
		};
	}

	@Test
	void welcomePageHandlerMappingIsAutoConfigured() {
		this.contextRunner.withPropertyValues("spring.resources.static-locations:classpath:/welcome-page/")
				.run((context) -> {
					assertThat(context).hasSingleBean(WelcomePageHandlerMapping.class);
					WelcomePageHandlerMapping bean = context.getBean(WelcomePageHandlerMapping.class);
					assertThat(bean.getRootHandler()).isNotNull();
				});
	}

	@Test
	void welcomePageHandlerIncludesCorsConfiguration() {
		this.contextRunner.withPropertyValues("spring.resources.static-locations:classpath:/welcome-page/")
				.withUserConfiguration(CorsConfigurer.class).run((context) -> {
					WelcomePageHandlerMapping bean = context.getBean(WelcomePageHandlerMapping.class);
					UrlBasedCorsConfigurationSource source = (UrlBasedCorsConfigurationSource) ReflectionTestUtils
							.getField(bean, "corsConfigurationSource");
					assertThat(source.getCorsConfigurations()).containsKey("/**");
				});
	}

	@Test
	void validatorWhenNoValidatorShouldUseDefault() {
		this.contextRunner.run((context) -> {
			assertThat(context).doesNotHaveBean(ValidatorFactory.class);
			assertThat(context).doesNotHaveBean(javax.validation.Validator.class);
			assertThat(context).getBeanNames(Validator.class).containsOnly("mvcValidator");
		});
	}

	@Test
	void validatorWhenNoCustomizationShouldUseAutoConfigured() {
		this.contextRunner.withConfiguration(AutoConfigurations.of(ValidationAutoConfiguration.class))
				.run((context) -> {
					assertThat(context).getBeanNames(javax.validation.Validator.class).containsOnly("defaultValidator");
					assertThat(context).getBeanNames(Validator.class).containsOnly("defaultValidator", "mvcValidator");
					Validator validator = context.getBean("mvcValidator", Validator.class);
					assertThat(validator).isInstanceOf(ValidatorAdapter.class);
					Object defaultValidator = context.getBean("defaultValidator");
					assertThat(((ValidatorAdapter) validator).getTarget()).isSameAs(defaultValidator);
					// Primary Spring validator is the one used by MVC behind the scenes
					assertThat(context.getBean(Validator.class)).isEqualTo(defaultValidator);
				});
	}

	@Test
	void validatorWithConfigurerAloneShouldUseSpringValidator() {
		this.contextRunner.withUserConfiguration(MvcValidator.class).run((context) -> {
			assertThat(context).doesNotHaveBean(ValidatorFactory.class);
			assertThat(context).doesNotHaveBean(javax.validation.Validator.class);
			assertThat(context).getBeanNames(Validator.class).containsOnly("mvcValidator");
			Validator expectedValidator = context.getBean(MvcValidator.class).validator;
			assertThat(context.getBean("mvcValidator")).isSameAs(expectedValidator);
			assertThat(context.getBean(RequestMappingHandlerAdapter.class).getWebBindingInitializer())
					.hasFieldOrPropertyWithValue("validator", expectedValidator);
		});
	}

	@Test
	void validatorWithConfigurerShouldUseSpringValidator() {
		this.contextRunner.withConfiguration(AutoConfigurations.of(ValidationAutoConfiguration.class))
				.withUserConfiguration(MvcValidator.class).run((context) -> {
					assertThat(context).getBeanNames(javax.validation.Validator.class).containsOnly("defaultValidator");
					assertThat(context).getBeanNames(Validator.class).containsOnly("defaultValidator", "mvcValidator");
					Validator expectedValidator = context.getBean(MvcValidator.class).validator;
					assertThat(context.getBean("mvcValidator")).isSameAs(expectedValidator);
					assertThat(context.getBean(RequestMappingHandlerAdapter.class).getWebBindingInitializer())
							.hasFieldOrPropertyWithValue("validator", expectedValidator);
				});
	}

	@Test
	void validatorWithConfigurerDoesNotExposeJsr303() {
		this.contextRunner.withUserConfiguration(MvcJsr303Validator.class).run((context) -> {
			assertThat(context).doesNotHaveBean(ValidatorFactory.class);
			assertThat(context).doesNotHaveBean(javax.validation.Validator.class);
			assertThat(context).getBeanNames(Validator.class).containsOnly("mvcValidator");
			Validator validator = context.getBean("mvcValidator", Validator.class);
			assertThat(validator).isInstanceOf(ValidatorAdapter.class);
			assertThat(((ValidatorAdapter) validator).getTarget())
					.isSameAs(context.getBean(MvcJsr303Validator.class).validator);
		});
	}

	@Test
	void validatorWithConfigurerTakesPrecedence() {
		this.contextRunner.withConfiguration(AutoConfigurations.of(ValidationAutoConfiguration.class))
				.withUserConfiguration(MvcValidator.class).run((context) -> {
					assertThat(context).hasSingleBean(ValidatorFactory.class);
					assertThat(context).hasSingleBean(javax.validation.Validator.class);
					assertThat(context).getBeanNames(Validator.class).containsOnly("defaultValidator", "mvcValidator");
					assertThat(context.getBean("mvcValidator")).isSameAs(context.getBean(MvcValidator.class).validator);
					// Primary Spring validator is the auto-configured one as the MVC one
					// has been customized via a WebMvcConfigurer
					assertThat(context.getBean(Validator.class)).isEqualTo(context.getBean("defaultValidator"));
				});
	}

	@Test
	void validatorWithCustomSpringValidatorIgnored() {
		this.contextRunner.withConfiguration(AutoConfigurations.of(ValidationAutoConfiguration.class))
				.withUserConfiguration(CustomSpringValidator.class).run((context) -> {
					assertThat(context).getBeanNames(javax.validation.Validator.class).containsOnly("defaultValidator");
					assertThat(context).getBeanNames(Validator.class).containsOnly("customSpringValidator",
							"defaultValidator", "mvcValidator");
					Validator validator = context.getBean("mvcValidator", Validator.class);
					assertThat(validator).isInstanceOf(ValidatorAdapter.class);
					Object defaultValidator = context.getBean("defaultValidator");
					assertThat(((ValidatorAdapter) validator).getTarget()).isSameAs(defaultValidator);
					// Primary Spring validator is the one used by MVC behind the scenes
					assertThat(context.getBean(Validator.class)).isEqualTo(defaultValidator);
				});
	}

	@Test
	void validatorWithCustomJsr303ValidatorExposedAsSpringValidator() {
		this.contextRunner.withConfiguration(AutoConfigurations.of(ValidationAutoConfiguration.class))
				.withUserConfiguration(CustomJsr303Validator.class).run((context) -> {
					assertThat(context).doesNotHaveBean(ValidatorFactory.class);
					assertThat(context).getBeanNames(javax.validation.Validator.class)
							.containsOnly("customJsr303Validator");
					assertThat(context).getBeanNames(Validator.class).containsOnly("mvcValidator");
					Validator validator = context.getBean(Validator.class);
					assertThat(validator).isInstanceOf(ValidatorAdapter.class);
					Validator target = ((ValidatorAdapter) validator).getTarget();
					assertThat(target).extracting("targetValidator").isSameAs(context.getBean("customJsr303Validator"));
				});
	}

	@Test
	void httpMessageConverterThatUsesConversionServiceDoesNotCreateACycle() {
		this.contextRunner.withUserConfiguration(CustomHttpMessageConverter.class)
				.run((context) -> assertThat(context).hasNotFailed());
	}

	@Test
	void cachePeriod() {
		this.contextRunner.withPropertyValues("spring.resources.cache.period:5").run(this::assertCachePeriod);
	}

	private void assertCachePeriod(AssertableWebApplicationContext context) {
		Map<String, Object> handlerMap = getHandlerMap(context.getBean("resourceHandlerMapping", HandlerMapping.class));
		assertThat(handlerMap).hasSize(2);
		for (Entry<String, Object> entry : handlerMap.entrySet()) {
			Object handler = entry.getValue();
			if (handler instanceof ResourceHttpRequestHandler) {
				assertThat(((ResourceHttpRequestHandler) handler).getCacheSeconds()).isEqualTo(5);
				assertThat(((ResourceHttpRequestHandler) handler).getCacheControl()).isNull();
			}
		}
	}

	@Test
	void cacheControl() {
		this.contextRunner.withPropertyValues("spring.resources.cache.cachecontrol.max-age:5",
				"spring.resources.cache.cachecontrol.proxy-revalidate:true").run(this::assertCacheControl);
	}

	@Test
	void defaultPathMatching() {
		this.contextRunner.run((context) -> {
			RequestMappingHandlerMapping handlerMapping = context.getBean(RequestMappingHandlerMapping.class);
			assertThat(handlerMapping.useSuffixPatternMatch()).isFalse();
			assertThat(handlerMapping.useRegisteredSuffixPatternMatch()).isFalse();
		});
	}

	@Test
	@Deprecated
	void useSuffixPatternMatch() {
		this.contextRunner.withPropertyValues("spring.mvc.pathmatch.use-suffix-pattern:true",
				"spring.mvc.pathmatch.use-registered-suffix-pattern:true").run((context) -> {
					RequestMappingHandlerMapping handlerMapping = context.getBean(RequestMappingHandlerMapping.class);
					assertThat(handlerMapping.useSuffixPatternMatch()).isTrue();
					assertThat(handlerMapping.useRegisteredSuffixPatternMatch()).isTrue();
				});
	}

	@Test
	void defaultContentNegotiation() {
		this.contextRunner.run((context) -> {
			RequestMappingHandlerMapping handlerMapping = context.getBean(RequestMappingHandlerMapping.class);
			ContentNegotiationManager contentNegotiationManager = handlerMapping.getContentNegotiationManager();
			assertThat(contentNegotiationManager.getStrategies()).doesNotHaveAnyElementsOfTypes(
					WebMvcAutoConfiguration.OptionalPathExtensionContentNegotiationStrategy.class);
		});
	}

	@Test
	@Deprecated
	void pathExtensionContentNegotiation() {
		this.contextRunner.withPropertyValues("spring.mvc.contentnegotiation.favor-path-extension:true")
				.run((context) -> {
					RequestMappingHandlerMapping handlerMapping = context.getBean(RequestMappingHandlerMapping.class);
					ContentNegotiationManager contentNegotiationManager = handlerMapping.getContentNegotiationManager();
					assertThat(contentNegotiationManager.getStrategies()).hasAtLeastOneElementOfType(
							WebMvcAutoConfiguration.OptionalPathExtensionContentNegotiationStrategy.class);
				});
	}

	@Test
	@Deprecated
	void queryParameterContentNegotiation() {
		this.contextRunner.withPropertyValues("spring.mvc.contentnegotiation.favor-parameter:true").run((context) -> {
			RequestMappingHandlerMapping handlerMapping = context.getBean(RequestMappingHandlerMapping.class);
			ContentNegotiationManager contentNegotiationManager = handlerMapping.getContentNegotiationManager();
			assertThat(contentNegotiationManager.getStrategies())
					.hasAtLeastOneElementOfType(ParameterContentNegotiationStrategy.class);
		});
	}

	@Test
	void customConfigurerAppliedAfterAutoConfig() {
		this.contextRunner.withUserConfiguration(CustomConfigurer.class).run((context) -> {
			ContentNegotiationManager manager = context.getBean(ContentNegotiationManager.class);
			assertThat(manager.getStrategies()).anyMatch(
					(strategy) -> WebMvcAutoConfiguration.OptionalPathExtensionContentNegotiationStrategy.class
							.isAssignableFrom(strategy.getClass()));
		});
	}

	@Test
	void contentNegotiationStrategySkipsPathExtension() throws Exception {
		ContentNegotiationStrategy delegate = mock(ContentNegotiationStrategy.class);
		ContentNegotiationStrategy strategy = new WebMvcAutoConfiguration.OptionalPathExtensionContentNegotiationStrategy(
				delegate);
		MockHttpServletRequest request = new MockHttpServletRequest();
		request.setAttribute(PathExtensionContentNegotiationStrategy.class.getName() + ".SKIP", Boolean.TRUE);
		ServletWebRequest webRequest = new ServletWebRequest(request);
		List<MediaType> mediaTypes = strategy.resolveMediaTypes(webRequest);
		assertThat(mediaTypes).containsOnly(MediaType.ALL);
	}

	@Test
	void requestContextFilterIsAutoConfigured() {
		this.contextRunner.run((context) -> assertThat(context).hasSingleBean(RequestContextFilter.class));
	}

	@Test
	void whenUserDefinesARequestContextFilterTheAutoConfiguredRegistrationBacksOff() {
		this.contextRunner.withUserConfiguration(RequestContextFilterConfiguration.class).run((context) -> {
			assertThat(context).hasSingleBean(RequestContextFilter.class);
			assertThat(context).hasBean("customRequestContextFilter");
		});
	}

	@Test
	void whenUserDefinesARequestContextFilterRegistrationTheAutoConfiguredFilterBacksOff() {
		this.contextRunner.withUserConfiguration(RequestContextFilterRegistrationConfiguration.class).run((context) -> {
			assertThat(context).hasSingleBean(FilterRegistrationBean.class);
			assertThat(context).hasBean("customRequestContextFilterRegistration");
			assertThat(context).doesNotHaveBean(RequestContextFilter.class);
		});
	}

	@Test
	void customPrinterAndParserShouldBeRegisteredAsConverters() {
		this.contextRunner.withUserConfiguration(ParserConfiguration.class, PrinterConfiguration.class)
				.run((context) -> {
					ConversionService service = context.getBean(ConversionService.class);
					assertThat(service.convert(new Example("spring", new Date()), String.class)).isEqualTo("spring");
					assertThat(service.convert("boot", Example.class)).extracting(Example::getName).isEqualTo("boot");
				});
	}

	@Test
	void urlPathHelperUsesFullPathByDefault() {
		this.contextRunner.run((context) -> {
			UrlPathHelper urlPathHelper = context.getBean(UrlPathHelper.class);
			assertThat(urlPathHelper).extracting("alwaysUseFullPath").isEqualTo(true);
		});
	}

	@Test
	void urlPathHelperDoesNotUseFullPathWithServletMapping() {
		this.contextRunner.withPropertyValues("spring.mvc.servlet.path=/test/").run((context) -> {
			UrlPathHelper urlPathHelper = context.getBean(UrlPathHelper.class);
			assertThat(urlPathHelper).extracting("alwaysUseFullPath").isEqualTo(false);
		});
	}

	@Test
	void urlPathHelperDoesNotUseFullPathWithAdditionalDispatcherServlet() {
		this.contextRunner.withUserConfiguration(AdditionalDispatcherServletConfiguration.class).run((context) -> {
			UrlPathHelper urlPathHelper = context.getBean(UrlPathHelper.class);
			assertThat(urlPathHelper).extracting("alwaysUseFullPath").isEqualTo(false);
		});
	}

	@Test
	void urlPathHelperDoesNotUseFullPathWithAdditionalUntypedDispatcherServlet() {
		this.contextRunner.withUserConfiguration(AdditionalUntypedDispatcherServletConfiguration.class)
				.run((context) -> {
					UrlPathHelper urlPathHelper = context.getBean(UrlPathHelper.class);
					assertThat(urlPathHelper).extracting("alwaysUseFullPath").isEqualTo(false);
				});
	}

	private void assertCacheControl(AssertableWebApplicationContext context) {
		Map<String, Object> handlerMap = getHandlerMap(context.getBean("resourceHandlerMapping", HandlerMapping.class));
		assertThat(handlerMap).hasSize(2);
		for (Object handler : handlerMap.keySet()) {
			if (handler instanceof ResourceHttpRequestHandler) {
				assertThat(((ResourceHttpRequestHandler) handler).getCacheSeconds()).isEqualTo(-1);
				assertThat(((ResourceHttpRequestHandler) handler).getCacheControl())
						.isEqualToComparingFieldByField(CacheControl.maxAge(5, TimeUnit.SECONDS).proxyRevalidate());
			}
		}
	}

	protected Map<String, List<Resource>> getResourceMappingLocations(ApplicationContext context) {
		Object bean = context.getBean("resourceHandlerMapping");
		if (bean instanceof HandlerMapping) {
			return getMappingLocations((HandlerMapping) bean);
		}
		assertThat(bean.toString()).isEqualTo("null");
		return Collections.emptyMap();
	}

	protected List<ResourceResolver> getResourceResolvers(ApplicationContext context, String mapping) {
		ResourceHttpRequestHandler resourceHandler = (ResourceHttpRequestHandler) context
				.getBean("resourceHandlerMapping", SimpleUrlHandlerMapping.class).getHandlerMap().get(mapping);
		return resourceHandler.getResourceResolvers();
	}

	protected List<ResourceTransformer> getResourceTransformers(ApplicationContext context, String mapping) {
		SimpleUrlHandlerMapping handler = context.getBean("resourceHandlerMapping", SimpleUrlHandlerMapping.class);
		ResourceHttpRequestHandler resourceHandler = (ResourceHttpRequestHandler) handler.getHandlerMap().get(mapping);
		return resourceHandler.getResourceTransformers();
	}

	@SuppressWarnings("unchecked")
	protected Map<String, List<Resource>> getMappingLocations(HandlerMapping mapping) {
		Map<String, List<Resource>> mappingLocations = new LinkedHashMap<>();
		getHandlerMap(mapping).forEach((key, value) -> {
			Object locations = ReflectionTestUtils.getField(value, "locations");
			mappingLocations.put(key, (List<Resource>) locations);
		});
		return mappingLocations;
	}

	protected Map<String, Object> getHandlerMap(HandlerMapping mapping) {
		if (mapping instanceof SimpleUrlHandlerMapping) {
			return ((SimpleUrlHandlerMapping) mapping).getHandlerMap();
		}
		return Collections.emptyMap();
	}

	@Configuration(proxyBeanMethods = false)
	static class ViewConfig {

		@Bean
		View jsonView() {
			return new AbstractView() {

				@Override
				protected void renderMergedOutputModel(Map<String, Object> model, HttpServletRequest request,
						HttpServletResponse response) throws Exception {
					response.getOutputStream().write("Hello World".getBytes());
				}

			};
		}

	}

	@Configuration(proxyBeanMethods = false)
	static class WebJars implements WebMvcConfigurer {

		@Override
		public void addResourceHandlers(ResourceHandlerRegistry registry) {
			registry.addResourceHandler("/webjars/**").addResourceLocations("classpath:/foo/");
		}

	}

	@Configuration(proxyBeanMethods = false)
	static class AllResources implements WebMvcConfigurer {

		@Override
		public void addResourceHandlers(ResourceHandlerRegistry registry) {
			registry.addResourceHandler("/**").addResourceLocations("classpath:/foo/");
		}

	}

	@Configuration(proxyBeanMethods = false)
	static class Config {

		@Bean
		ServletWebServerFactory webServerFactory() {
			return webServerFactory;
		}

		@Bean
		WebServerFactoryCustomizerBeanPostProcessor ServletWebServerCustomizerBeanPostProcessor() {
			return new WebServerFactoryCustomizerBeanPostProcessor();
		}

	}

	@Configuration(proxyBeanMethods = false)
	static class CustomViewResolver {

		@Bean
		ViewResolver viewResolver() {
			return new MyViewResolver();
		}

	}

	@Configuration(proxyBeanMethods = false)
	static class CustomContentNegotiatingViewResolver {

		@Bean
		ContentNegotiatingViewResolver myViewResolver() {
			return new ContentNegotiatingViewResolver();
		}

	}

	static class MyViewResolver implements ViewResolver {

		@Override
		public View resolveViewName(String viewName, Locale locale) {
			return null;
		}

	}

	@Configuration(proxyBeanMethods = false)
	static class CustomConfigurableWebBindingInitializer {

		@Bean
		ConfigurableWebBindingInitializer customConfigurableWebBindingInitializer() {
			return new CustomWebBindingInitializer();
		}

	}

	static class CustomWebBindingInitializer extends ConfigurableWebBindingInitializer {

	}

	@Configuration(proxyBeanMethods = false)
	static class CustomFormContentFilter {

		@Bean
		FormContentFilter customFormContentFilter() {
			return new FormContentFilter();
		}

	}

	@Configuration(proxyBeanMethods = false)
	static class CustomRequestMappingHandlerMapping {

		private int handlerMappings;

		@Bean
		WebMvcRegistrations webMvcRegistrationsHandlerMapping() {
			return new WebMvcRegistrations() {

				@Override
				public RequestMappingHandlerMapping getRequestMappingHandlerMapping() {
					CustomRequestMappingHandlerMapping.this.handlerMappings++;
					return new MyRequestMappingHandlerMapping();
				}

			};
		}

	}

	static class MyRequestMappingHandlerMapping extends RequestMappingHandlerMapping {

	}

	@Configuration(proxyBeanMethods = false)
	static class CustomRequestMappingHandlerAdapter {

		private int handlerAdapters = 0;

		@Bean
		WebMvcRegistrations webMvcRegistrationsHandlerAdapter() {
			return new WebMvcRegistrations() {

				@Override
				public RequestMappingHandlerAdapter getRequestMappingHandlerAdapter() {
					CustomRequestMappingHandlerAdapter.this.handlerAdapters++;
					return new MyRequestMappingHandlerAdapter();
				}

			};
		}

	}

	static class MyRequestMappingHandlerAdapter extends RequestMappingHandlerAdapter {

	}

	@Configuration(proxyBeanMethods = false)
	static class CustomExceptionHandlerExceptionResolver {

		private int exceptionResolvers = 0;

		@Bean
		WebMvcRegistrations webMvcRegistrationsExceptionResolver() {
			return new WebMvcRegistrations() {

				@Override
				public ExceptionHandlerExceptionResolver getExceptionHandlerExceptionResolver() {
					CustomExceptionHandlerExceptionResolver.this.exceptionResolvers++;
					return new MyExceptionHandlerExceptionResolver();
				}

			};
		}

	}

	static class MyExceptionHandlerExceptionResolver extends ExceptionHandlerExceptionResolver {

	}

	@Configuration(proxyBeanMethods = false)
	@Import({ CustomRequestMappingHandlerMapping.class, CustomRequestMappingHandlerAdapter.class })
	static class MultipleWebMvcRegistrations {

	}

	@Configuration(proxyBeanMethods = false)
	static class MvcValidator implements WebMvcConfigurer {

		private final Validator validator = mock(Validator.class);

		@Override
		public Validator getValidator() {
			return this.validator;
		}

	}

	@Configuration(proxyBeanMethods = false)
	static class MvcJsr303Validator implements WebMvcConfigurer {

		private final LocalValidatorFactoryBean validator = new LocalValidatorFactoryBean();

		@Override
		public Validator getValidator() {
			return this.validator;
		}

	}

	@Configuration(proxyBeanMethods = false)
	static class CustomJsr303Validator {

		@Bean
		javax.validation.Validator customJsr303Validator() {
			return mock(javax.validation.Validator.class);
		}

	}

	@Configuration(proxyBeanMethods = false)
	static class CustomSpringValidator {

		@Bean
		Validator customSpringValidator() {
			return mock(Validator.class);
		}

	}

	@Configuration(proxyBeanMethods = false)
	static class CustomHttpMessageConverter {

		@Bean
		HttpMessageConverter<?> customHttpMessageConverter(ConversionService conversionService) {
			return mock(HttpMessageConverter.class);
		}

	}

	@Configuration(proxyBeanMethods = false)
	static class CustomConfigurer implements WebMvcConfigurer {

		@Override
		public void configureContentNegotiation(ContentNegotiationConfigurer configurer) {
			configurer.favorPathExtension(true);
		}

	}

	@Configuration(proxyBeanMethods = false)
	static class CustomApplicationTaskExecutorConfig {

		@Bean
		Executor applicationTaskExecutor() {
			return mock(Executor.class);
		}

	}

	@Configuration(proxyBeanMethods = false)
	static class CustomAsyncTaskExecutorConfig {

		@Bean
		AsyncTaskExecutor customTaskExecutor() {
			return mock(AsyncTaskExecutor.class);
		}

	}

	@Configuration(proxyBeanMethods = false)
	static class CustomAsyncTaskExecutorConfigurer implements WebMvcConfigurer {

		private final AsyncTaskExecutor taskExecutor = mock(AsyncTaskExecutor.class);

		@Override
		public void configureAsyncSupport(AsyncSupportConfigurer configurer) {
			configurer.setTaskExecutor(this.taskExecutor);
		}

	}

	@Configuration(proxyBeanMethods = false)
	static class RequestContextFilterConfiguration {

		@Bean
		RequestContextFilter customRequestContextFilter() {
			return new RequestContextFilter();
		}

	}

	@Configuration(proxyBeanMethods = false)
	static class RequestContextFilterRegistrationConfiguration {

		@Bean
		FilterRegistrationBean<RequestContextFilter> customRequestContextFilterRegistration() {
			return new FilterRegistrationBean<>(new RequestContextFilter());
		}

	}

	@Configuration(proxyBeanMethods = false)
	static class PrinterConfiguration {

		@Bean
		Printer<Example> examplePrinter() {
			return new ExamplePrinter();
		}

	}

	@Configuration(proxyBeanMethods = false)
	static class ParserConfiguration {

		@Bean
		Parser<Example> exampleParser() {
			return new ExampleParser();
		}

	}

	static final class Example {

		private final String name;

		private Example(String name, Date date) {
			this.name = name;
		}

		String getName() {
			return this.name;
		}

	}

	static class ExamplePrinter implements Printer<Example> {

		@Override
		public String print(Example example, Locale locale) {
			return example.getName();
		}

	}

	static class ExampleParser implements Parser<Example> {

		@Override
		public Example parse(String source, Locale locale) {
			return new Example(source, new Date());
		}

	}

	@Configuration
	static class CorsConfigurer implements WebMvcConfigurer {

		@Override
		public void addCorsMappings(CorsRegistry registry) {
			registry.addMapping("/**").allowedMethods("GET");
		}

	}

	@Configuration(proxyBeanMethods = false)
	static class AdditionalDispatcherServletConfiguration {

		@Bean
		ServletRegistrationBean<DispatcherServlet> additionalDispatcherServlet() {
			return new ServletRegistrationBean<>(new DispatcherServlet());
		}

	}

	@Configuration(proxyBeanMethods = false)
	static class AdditionalUntypedDispatcherServletConfiguration {

		@Bean
		ServletRegistrationBean<?> additionalDispatcherServlet() {
			return new ServletRegistrationBean<>(new DispatcherServlet());
		}

	}

}