Restore Spring Security integration with HtmlUnitDriver

Prior to this commit, securityDelegateMockMvcHtmlUnitDriverCustomizer
did not have an @Bean annotation and therefore
was not registered as a bean in SecurityMockMvcAutoConfiguration.

See gh-50602

Signed-off-by: Dmytro Nosan <dimanosan@gmail.com>

module/spring-boot-security-test/src/main/java/org/springframework/boot/security/test/autoconfigure/webmvc/SecurityMockMvcAutoConfiguration.java

@@ -60,6 +60,7 @@ public final class SecurityMockMvcAutoConfiguration {
 	@ConditionalOnClass(HtmlUnitDriver.class)
 	static class SecurityMockMvcHtmlUnitDriverConfiguration {
 
+		@Bean
 		MockMvcHtmlUnitDriverCustomizer securityDelegateMockMvcHtmlUnitDriverCustomizer() {
 			return (driver) -> driver
 				.setExecutor(new DelegatingSecurityContextExecutor(Executors.newSingleThreadExecutor()));

module/spring-boot-security-test/src/test/java/org/springframework/boot/security/test/autoconfigure/webmvc/SecurityMockMvcAutoConfigurationTests.java

@@ -0,0 +1,111 @@
+/*
+ * Copyright 2012-present 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.security.test.autoconfigure.webmvc;
+
+import java.util.concurrent.Executor;
+import java.util.function.Function;
+
+import jakarta.servlet.Filter;
+import org.junit.jupiter.api.Test;
+import org.mockito.ArgumentCaptor;
+import org.openqa.selenium.htmlunit.HtmlUnitDriver;
+
+import org.springframework.boot.autoconfigure.AutoConfigurations;
+import org.springframework.boot.security.test.autoconfigure.webmvc.SecurityMockMvcAutoConfiguration.SecurityMockMvcBuilderCustomizer;
+import org.springframework.boot.test.context.FilteredClassLoader;
+import org.springframework.boot.test.context.runner.ApplicationContextRunner;
+import org.springframework.boot.webmvc.test.autoconfigure.MockMvcHtmlUnitDriverCustomizer;
+import org.springframework.security.concurrent.DelegatingSecurityContextExecutor;
+import org.springframework.security.test.web.servlet.request.SecurityMockMvcRequestPostProcessors;
+import org.springframework.security.web.context.AbstractSecurityWebApplicationInitializer;
+import org.springframework.test.web.servlet.MockMvc;
+import org.springframework.test.web.servlet.request.RequestPostProcessor;
+import org.springframework.test.web.servlet.setup.ConfigurableMockMvcBuilder;
+import org.springframework.test.web.servlet.setup.MockMvcConfigurer;
+import org.springframework.web.context.WebApplicationContext;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.mockito.BDDMockito.then;
+import static org.mockito.Mockito.mock;
+
+/**
+ * Tests for {@link SecurityMockMvcAutoConfiguration}.
+ *
+ * @author Dmytro Nosan
+ */
+class SecurityMockMvcAutoConfigurationTests {
+
+	private final ApplicationContextRunner contextRunner = new ApplicationContextRunner()
+		.withConfiguration(AutoConfigurations.of(SecurityMockMvcAutoConfiguration.class));
+
+	@Test
+	void securityMockMvcBuilderCustomizerIsNotRegisteredWhenMockMvcIsNotOnTheClasspath() {
+		this.contextRunner.withClassLoader(new FilteredClassLoader(MockMvc.class))
+			.with(securityFilterChain())
+			.run((context) -> assertThat(context).doesNotHaveBean(MockMvcHtmlUnitDriverCustomizer.class)
+				.doesNotHaveBean(SecurityMockMvcBuilderCustomizer.class));
+	}
+
+	@Test
+	void securityMockMvcBuilderCustomizerIsNotRegisteredWhenSecurityFilterChainIsMissing() {
+		this.contextRunner
+			.run((context) -> assertThat(context).doesNotHaveBean(SecurityMockMvcBuilderCustomizer.class));
+	}
+
+	@Test
+	void htmlUnitDriverCustomizerIsNotRegisteredWhenHtmlUnitIsNotOnTheClasspath() {
+		this.contextRunner.withClassLoader(new FilteredClassLoader(HtmlUnitDriver.class))
+			.run((context) -> assertThat(context).doesNotHaveBean(MockMvcHtmlUnitDriverCustomizer.class));
+	}
+
+	@Test
+	void registersSecurityMockMvcBuilderCustomizerWhenSecurityFilterChainIsPresent() {
+		this.contextRunner.with(securityFilterChain())
+			.run((context) -> assertThat(context).hasSingleBean(SecurityMockMvcBuilderCustomizer.class)
+				.getBean(SecurityMockMvcBuilderCustomizer.class)
+				.satisfies((customizer) -> {
+					ConfigurableMockMvcBuilder<?> builder = mock(ConfigurableMockMvcBuilder.class);
+					customizer.customize(builder);
+					ArgumentCaptor<MockMvcConfigurer> configurerCaptor = ArgumentCaptor
+						.forClass(MockMvcConfigurer.class);
+					then(builder).should().apply(configurerCaptor.capture());
+					RequestPostProcessor postProcessor = configurerCaptor.getValue()
+						.beforeMockMvcCreated(builder, mock(WebApplicationContext.class));
+					assertThat(postProcessor)
+						.hasSameClassAs(SecurityMockMvcRequestPostProcessors.testSecurityContext());
+				}));
+	}
+
+	@Test
+	void registersSecurityMockMvcHtmlUnitDriverCustomizerWhenHtmlUnitIsPresent() {
+		this.contextRunner.run((context) -> assertThat(context).hasSingleBean(MockMvcHtmlUnitDriverCustomizer.class)
+			.getBean(MockMvcHtmlUnitDriverCustomizer.class)
+			.satisfies((customizer) -> {
+				HtmlUnitDriver htmlUnitDriver = mock(HtmlUnitDriver.class);
+				customizer.customize(htmlUnitDriver);
+				ArgumentCaptor<Executor> executorCaptor = ArgumentCaptor.forClass(Executor.class);
+				then(htmlUnitDriver).should().setExecutor(executorCaptor.capture());
+				assertThat(executorCaptor.getValue()).isInstanceOf(DelegatingSecurityContextExecutor.class);
+			}));
+	}
+
+	private Function<ApplicationContextRunner, ApplicationContextRunner> securityFilterChain() {
+		return (contextRunner) -> contextRunner.withBean(AbstractSecurityWebApplicationInitializer.DEFAULT_FILTER_NAME,
+				Filter.class, () -> mock(Filter.class));
+	}
+
+}